Commit Graph

642 Commits

Author SHA1 Message Date
Joshua Boniface fad27a7f4d Lint: E131 continuation line unaligned for hanging indent 2020-11-06 22:29:49 -05:00
Joshua Boniface 2eef6a1c21 Lint: E265 block comment should start with '# ' 2020-11-06 21:32:17 -05:00
Joshua Boniface 4b47a2424c Lint: E303 too many blank lines (2) 2020-11-06 21:16:52 -05:00
Joshua Boniface cb2defbde9 Lint: W391 blank line at end of file 2020-11-06 21:14:19 -05:00
Joshua Boniface 5da314902f Lint: F841 local variable '<variable>' is assigned to but never used 2020-11-06 21:13:13 -05:00
Joshua Boniface 98a573bbc7 Lint: E402 module level import not at top of file 2020-11-06 20:40:32 -05:00
Joshua Boniface aecb845d6a Lint: E713 test for membership should be 'not in' 2020-11-06 20:37:52 -05:00
Joshua Boniface fde8ea2fea Lint: W291 trailing whitespace 2020-11-06 19:44:14 -05:00
Joshua Boniface 57c51d3234 Lint: E711 comparison to None should be 'if cond is not None:' 2020-11-06 19:37:13 -05:00
Joshua Boniface ce01b41d81 Lint: E711 comparison to None should be 'if cond is None:' 2020-11-06 19:36:36 -05:00
Joshua Boniface 4d6f36aca0 Lint: E712 comparison to False should be 'if cond is False:' or 'if not cond:' 2020-11-06 19:35:51 -05:00
Joshua Boniface fb4aafcea9 Lint: E111 indentation is not a multiple of four 2020-11-06 19:26:22 -05:00
Joshua Boniface d9e7b7ec15 Lint: F401 <library> imported but unused 2020-11-06 19:22:49 -05:00
Joshua Boniface ebf254f62d Lint: W293 blank line contains whitespace 2020-11-06 19:11:07 -05:00
Joshua Boniface 63f4f9aed7 Lint: E722 do not use bare 'except' 2020-11-06 18:55:10 -05:00
Joshua Boniface 56ba7b1457 Bump version to 0.9.1 2020-10-29 12:16:38 -04:00
Joshua Boniface ec0b8acf90 Support per-VM migration type selectors
Allow a VM to specify its migration type as a default choice. The valid
options are "default" (i.e. behave as now), "live" which forces a live
migration only, and "shutdown" which forces a shutdown migration only.
The new option is treated as a VM meta option and is set to default if
not found.
2020-10-29 12:01:29 -04:00
Joshua Boniface 5d08ad9573 Fix incorrect keepalive interval setting 2020-10-26 11:44:45 -04:00
Joshua Boniface 0f299777f1 Modify version to 3-digit numbering
I expect 0.9 will be fairly long-lived, so add another decimal place so
I may continue adding tweaks to it.

THIS IS NOT SEMVER.
2020-10-26 02:13:11 -04:00
Joshua Boniface 890023cbfc Make sender wait dynamic based on receiver 2020-10-21 14:43:54 -04:00
Joshua Boniface 28abb018e3 Improve some timeouts and conditionals 2020-10-21 12:00:10 -04:00
Joshua Boniface 017953c2e6 Move lock release to phase D 2020-10-21 11:07:01 -04:00
Joshua Boniface 82b4d3ed1b Add missing prefix statements to loggers 2020-10-21 10:52:53 -04:00
Joshua Boniface bae366a316 Add waits and only receive check on send 2020-10-21 10:43:42 -04:00
Joshua Boniface 351076c15e Check if node changed during final check
Avoids situations where two migrates, to different nodes, happen in
rapid succession. Aborts the migration if the current target node no
longer matches what was set at the start of the execution.
2020-10-21 02:52:36 -04:00
Joshua Boniface 42514b9a50 Improve messages further 2020-10-21 02:41:42 -04:00
Joshua Boniface 611e47f338 Add messages to migration aborts
Results in some information duplication, but ensures logging of the
reason a migration was aborted separate from the error(s) this may
generate.
2020-10-21 02:38:42 -04:00
Joshua Boniface 1523959074 Move where setting last_ vars happens 2020-10-21 02:24:00 -04:00
Joshua Boniface ef762359f4 Adjust timing to avoid migrating to self quickly
Add another separate state lock, release it earlier, and ensure timings
are good to avoid double-migrating one VM.
2020-10-21 02:17:55 -04:00
Joshua Boniface 398d33778f Avoid stopping duplicates, just lock our own key 2020-10-20 16:10:39 -04:00
Joshua Boniface a6d492ed9f Remove spurious writes and adjust sleep 2020-10-20 16:04:26 -04:00
Joshua Boniface 11fa3b0df3 Remove additional wait and add last_node entries
These allow for aborting a migration to retain the previous settings and
override what the client set.
2020-10-20 15:58:55 -04:00
Joshua Boniface 442aa4e420 Tweak timers further 2020-10-20 15:43:59 -04:00
Joshua Boniface 3910843660 Add missing break 2020-10-20 15:39:29 -04:00
Joshua Boniface 70f3fdbfb9 Tweak the delays slightly on receive 2020-10-20 15:38:07 -04:00
Joshua Boniface 7cb0241a12 Attempt live migrates 3 times before proceeding 2020-10-20 15:33:41 -04:00
Joshua Boniface 9fb33ed7a7 Increase peer lock acquiring timers 2020-10-20 15:26:59 -04:00
Joshua Boniface abfe0108ab Better handle aborting migrations 2020-10-20 15:22:16 -04:00
Joshua Boniface 567fe8f36b Wait for existing migrations before proceeding 2020-10-20 15:12:32 -04:00
Joshua Boniface ec7b78b9b8 Add additional short sleep in receive 2020-10-20 13:29:17 -04:00
Joshua Boniface 224c8082ef Alter text of synchronization messages 2020-10-20 13:08:18 -04:00
Joshua Boniface f9e7e9884f Improve handling of VM migrations
The VM migration code was very old, very spaghettified, and prone to
strange failures.

Improve this by taking cues from the node primary migration. Use
synchronization between the nodes to ensure lockstep completion of the
migration in discrete steps.

A proper queue can be built later to integrate with this code more
cleanly.

References #108
2020-10-20 13:01:55 -04:00
Joshua Boniface 726501f4d4 Add additional logging to flush selector
Adds additional debug logging to the flush selector to determine how any
why any given node is selected. Useful for troubleshooting strange
choices.
2020-10-20 12:34:18 -04:00
Joshua Boniface 7cc33451b9 Improve Munin check with extinfo 2020-10-19 11:01:00 -04:00
Joshua Boniface c6e34c7dc6 Bump base version to 0.9 2020-10-18 14:31:19 -04:00
Joshua Boniface f749633f7c Use provisioned memory for mem migration selector
Use the new "provisioned" memory field, instead of the "allocated"
memory field, to determine the optimal node when using the "mem"
migration selector. This will take into account non-running VMs in the
calculation as well as running VMs.
2020-10-18 14:17:15 -04:00
Joshua Boniface a4b80be5ed Add provisioned memory to node info
Adds a separate field to the node memory, "provisioned", which totals
the amount of memory provisioned to all VMs on the node, regardless of
state, and in contrast to "allocated" which only counts running VMs.

Allows for the detection of potential overprovisioned states when
factoring in non-running VMs.

Includes the supporting code to get this data, since the original
implementation of VM memory selection was dependent on the VM being
running and getting this from libvirt. Now, if the VM is not active, it
gets this from the domain XML instead.
2020-10-18 14:17:15 -04:00
Joshua Boniface aa5f8c93fd Entirely disable IPv6 on bridged interfaces
Prevents any potential leakage due to autoconfigured IPv6 on bridged
interfaces. These are exclusively VM-side bridges, and the PVC host
should not have any IPv6 configuration on them, ever.
2020-10-15 11:00:59 -04:00
Joshua Boniface 9366977fe6 Copy d_domain before iterating
Prevents a bug where the thread can crash due to a change in the
d_domain object while running the for loop. By copying and iterating
over the copy, this becomes safer.
2020-09-16 15:12:37 -04:00
Joshua Boniface 65b44f2955 Avoid breaking keepalive during incoming migration
The keepalive was getting stuck gathering memoryStats from the
non-running VM, since it was in a paused state. Avoid this by just
skipping past the rest of the stats gathering if the VM isn't running.
2020-08-28 01:47:36 -04:00
Joshua Boniface 78dec77987 Bump version to 0.8 2020-08-26 10:24:44 -04:00
Joshua Boniface 1dcc1f6d55 Rename sample database for API
From pvcprov to pvcapi to facilitate the changing nature of this
database and its expansion to benchmark results.
2020-08-25 01:59:35 -04:00
Joshua Boniface 921e57ca78 Fix syntax error 2020-08-20 23:05:56 -04:00
Joshua Boniface 3cc7df63f2 Add configurable VM shutdown timeout
Closes #102
2020-08-20 21:26:12 -04:00
Joshua Boniface 7e2114b536 Add initial monitoring configurations to daemon
Initial work to support multiple monitoring agents including Munin,
Check_MK, and NRPE at the least.
2020-08-17 17:05:55 -04:00
Joshua Boniface e8e65934e3 Use logger prefix for thread debug logs 2020-08-17 14:30:21 -04:00
Joshua Boniface 24fda8a73f Use new debug logger for DNS Aggregator 2020-08-17 14:26:43 -04:00
Joshua Boniface 9b3ef6d610 Add connect timeout to Ceph
This doesn't seem to actually do anything (like most of these
timeouts...) but add it just for posterity.
2020-08-17 13:58:14 -04:00
Joshua Boniface b451c0e8e3 Add additional start/finish debug messages 2020-08-17 13:11:03 -04:00
Joshua Boniface f9b126a106 Make zkhandler accept failures more robustly
Most of these would silently fail if there was e.g. an issue with the ZK
connection. Instead, encase things in try blocks and handle the
exceptions in a more graceful way, returning None or False if
applicable. Except for locks, which should retry 5 times before
aborting.
2020-08-17 13:03:36 -04:00
Joshua Boniface 553f96e7ef Use logger for debug output
Using simple print statements was annoying (lack of timing info and
formatting), so move to using the debug logger for these instead with a
custom state ('d') with white text to differentiate them. Also indicate
which subthread of the keepalive each task is being executed in for
easier tracing of issues.
2020-08-17 12:46:52 -04:00
Joshua Boniface 65add58c9a Properly properly handle issue 2020-08-16 11:38:39 -04:00
Joshua Boniface 0a01d84290 Tie fence timers to keepalive_interval
Also wait 2 full keepalive intervals after fencing before doing anything
else, to give the Ceph cluster a chance to recover.
2020-08-15 12:38:03 -04:00
Joshua Boniface 4afb288429 Properly handle missing domain_name fail 2020-08-15 12:07:23 -04:00
Joshua Boniface 985ad5edc0 Warn if fencing will fail
Verify our IPMI state on startup, and then warn if fencing will fail.
For now, this is sufficient, but in future (requires refactoring) we
might want to adjust how fencing occurs based on this information.
2020-08-13 14:42:18 -04:00
Joshua Boniface 0587bcbd67 Go back to manual command for OSD stats
Using the Ceph library was a disaster here; it had no timeout or way to
force it to continue, so keepalives would become stuck and trigger fence
storms. Go back to the manual osd dump command with a 2s timeout which
is far more reliable and can be adequately terminated if it runs long.
2020-08-12 22:31:25 -04:00
Joshua Boniface 09c1bb6a46 Increase start delay of flush service 2020-08-11 14:17:35 -04:00
Joshua Boniface e0cb4a58c3 Ensure zk_listener is readded after reconnect 2020-08-11 12:46:15 -04:00
Joshua Boniface 099c58ead8 Fix missing char in log message 2020-08-11 12:40:35 -04:00
Joshua Boniface 0e5c681ada Clean up imports
Make several imports more specific to reduce redundant code imports and
improve memory utilization.
2020-08-11 12:09:10 -04:00
Joshua Boniface 46ffe352e3 Better handle subthread timeouts in keepalive
Prevent the main keepalive thread from getting stuck due to a subthread
taking an enormous time. If this happens, the rest of the main keepalive
will continue onward, thus ensuring that the main keepalive does not
fail for a significant number of cycles, which would cause a fence.
2020-08-11 11:37:26 -04:00
Joshua Boniface ccee124c8b Adjust fence failcount limit to 6 (30s)
The previous saving throw limit (3/15s) seems to have been too low. I
was observing bizarre failures where a node would be fenced while it was
still starting up. Some of this may have been related to Zookeeper
connections taking too long, but this was inconsistent.

Increase this to 6 saving throws (30s). This provides significantly more
time for a node to properly check in on startup before another node
fences it. In the real world, 15s vs 30s isn't that big of a downtime
change, but prevents false-positive fences.
2020-08-05 22:40:07 -04:00
Joshua Boniface 02343079c0 Improve fencing migrate layout
Open the option to do this in parallel with some threads
2020-08-05 22:26:01 -04:00
Joshua Boniface 37b83aad6a Add logging and use better conditional 2020-08-05 21:57:36 -04:00
Joshua Boniface 876f2424e0 Ensure dead state isn't written erroneously 2020-08-05 21:57:11 -04:00
Joshua Boniface 5871380e1b Avoid crashing VM stats thread if domain migrated 2020-06-10 17:10:46 -04:00
Joshua Boniface 654a3cb7fa Improve debug output and use ceph df util data 2020-06-06 22:52:49 -04:00
Joshua Boniface 9b65d3271a Improve handling of Ceph status gathering
Use the Rados library instead of random OS commands, which massively
improves the performance of these tasks.

Closes #97
2020-06-06 22:30:25 -04:00
Joshua Boniface 598b2025e8 Use Rados and add Ceph entries to pvcnoded.yaml 2020-06-06 21:12:51 -04:00
Joshua Boniface 70b787d1fd Move all VM functions into thread 2020-06-06 15:44:05 -04:00
Joshua Boniface e1310a05f2 Implement recording of VM stats during keepalive 2020-06-06 15:34:03 -04:00
Joshua Boniface 2ad6860dfe Move Ceph statistics gathering into thread 2020-06-06 13:25:02 -04:00
Joshua Boniface cebb4bbc1a Comment cleanup 2020-06-06 13:20:40 -04:00
Joshua Boniface a672e06dd2 Move fencing to end of keepalive function 2020-06-06 13:19:11 -04:00
Joshua Boniface 1db73bb892 Move libvirt closure into previous section 2020-06-06 13:18:37 -04:00
Joshua Boniface c1956072f0 Rename update_zookeeper function to node_keepalive 2020-06-06 12:49:50 -04:00
Joshua Boniface ce60836c34 Allow enforcement of live migration
Provides a CLI and API argument to force live migration, which triggers
a new VM state "migrate-live". The node daemon VMInstance during migrate
will read this flag from the state and, if enforced, will not trigger a
shutdown migration.

Closes #95
2020-06-06 12:00:44 -04:00
Joshua Boniface b5434ba744 Fix typo in variable name 2020-06-06 11:29:48 -04:00
Joshua Boniface b9e5b14f94 Update lastnode too if a self-migrate is aborted
References #92
2020-06-04 10:28:04 -04:00
Joshua Boniface 5d2031d99e Prevent a VM migrating to the same node
Prevents a rare edge case where a node can end up "migrating" to itself.
Quick hack to fix this, though like most of the VM management should
probably be rethought/rewritten later.

Fixes #92
2020-06-04 10:26:47 -04:00
Joshua Boniface 5f9836f96d Add error message to OSD parse fail 2020-05-12 11:04:38 -04:00
Joshua Boniface 95c59ba629 Improve flush handling slightly 2020-05-12 11:04:38 -04:00
Joshua Boniface 72a38fd437 Correct changed dhcp_reservations key name 2020-05-09 10:00:53 -04:00
Joshua Boniface b580760537 Add missing fmt_cyan variable 2020-05-08 18:15:02 -04:00
Joshua Boniface 331027d124 Add further tweaks to takeover state checks
Just ensure that everything is proper state before proceeding
2020-04-22 11:16:19 -04:00
Joshua Boniface ae4f36b881 Hook flush into more services
Trying to ensure that pvc-flush completes before anything tries to shut
down.
2020-04-14 19:58:53 -04:00
Joshua Boniface 611e0edd80 Reorder last keepalive during cleanup
Make sure the stopping of the keepalive timer and final keepalive update
are done as the last step before complete shutdown. The previous setup
could conceivably result in a node being fenced should the cleanup
operations take longer than ~45 seconds, for instance if primary node
switchover took too long or blocked, or log watchers failed to stop
quickly enough. Ensures that keepalives will continue to be run during
the shutdown process until the last possible moment.
2020-04-12 03:49:29 -04:00
Joshua Boniface b413e042a6 Improve handling of primary contention
Previously, contention could occasionally cause a flap/dual primary
contention state due to the lack of checking within this function. This
could cause a state where a node transitions to primary than is almost
immediately shifted away, which could cause undefined behaviour in the
cluster.

The solution includes several elements:
    * Implement an exclusive lock operation in zkhandler
    * Switch the become_primary function to use this exclusive lock
    * Implement exclusive locking during the contention process
    * As a failsafe, check stat versions before setting the node as the
      primary node, in case another node already has
    * Delay the start of takeover/relinquish operations by slightly
      longer than the lock timeout
    * Make the current router_state conditions more explicit (positive
      conditionals rather than negative conditionals)

The new scenario ensures that during contention, only one secondary will
ever succeed at acquiring the lock. Ideally, the other would then grab
the lock and pass, but in testing this does not seem to be the case -
the lock always times out, so the failsafe check is technically not
needed but has been left as an added safety mechanism. With this setup,
the node that fails the contention will never block the switchover nor
will it try to force itself onto the cluster after another node has
successfully won contention.

Timeouts may need to be adjusted in the future, but the base timeout of
0.4 seconds (and transition delay of 0.5 seconds) seems to work reliably
during preliminary tests.
2020-04-12 03:40:17 -04:00
Joshua Boniface e672d799a6 Set flush after pvcapid.service
This may or may not help, but should in theory prevent the flush from
trying to run after a (locally-running) API daemon is terminated, which
could cause an API failure and a failure to flush.
2020-04-12 01:48:50 -04:00
Joshua Boniface a130f19a19 Depend pvcnoded on Zookeeper (harder) and libvirtd 2020-04-09 09:57:53 -04:00
Joshua Boniface a671d9d457 Use consistent tense in messages 2020-04-08 22:00:51 -04:00
Joshua Boniface fee1c7dd6c Reorder cleanup and gracefully wait for flushes 2020-04-08 22:00:08 -04:00
Joshua Boniface 5d58bee34f Add some time around noded startup/shutdown
Otherwise, systemd kills networking before the node daemon fully stops
and it goes into "dead" status, which is super annoying.
2020-04-01 23:59:14 -04:00
Joshua Boniface f668412941 Don't use Requires as the dep is too hard
Requires seems to flush on every service restart which is NOT what we
want. Use Wants instead.
2020-04-01 15:15:37 -04:00
Joshua Boniface a0ebc0d3a7 Add more robust requirements to pvc-flush service 2020-04-01 15:09:44 -04:00
Joshua Boniface 98a7005c1b Add significant TimeoutSec to pvc-flush service
This will stop systemd from killing the service in the middle of a flush
or unflush operation, which completely defeats the purpose. 30 minutes
was chosen as this is a very large but still somewhat manageable value,
which should cover even a very large very loaded cluster with room to
spare.
2020-04-01 01:24:09 -04:00
Joshua Boniface 0a367898a0 Don't trigger aggregator fail if fine 2020-03-12 13:22:12 -04:00
Joshua Boniface c02bc0b46a Correct issues with VM lock freeing
Code was bad and using a depricated feature.
2020-03-02 12:45:12 -05:00
Joshua Boniface 1e4350ca6f Properly handle takeover state in VXNetworks
Most of these actions/conditionals were looking for primary state, but
were failing during node takeover. Update the conditionals to look for
both router states instead.

Also add a wait to lock flushing until a takeover is completed.
2020-03-02 10:41:00 -05:00
Joshua Boniface 57768f2583 Remove an obsolete script 2020-02-19 21:40:23 -05:00
Joshua Boniface e4e4e336b4 Handle invalid cursor setup cleanly
This seems to happen only during termination, so catch it and continue
so the loop terminates.
2020-02-19 16:29:59 -05:00
Joshua Boniface d2a5fe59c0 Use transitional takeover states for migration
Use a pair of transitional states, "takeover" and "relinquish", when
transitioning between primary and secondary coordinator states. This
provides a clsuter-wide record that the nodes are still working during
their synchronous transition states, and should allow clients to
determine when the node(s) have fully switched over. Also add an
additional 2 seconds of wait at the end of the transition jobs to ensure
everything has had a chance to start before proceeding.

References #72
2020-02-19 14:06:54 -05:00
Joshua Boniface 9c7041f12c Update package version to 0.7 2020-02-15 23:25:47 -05:00
Joshua Boniface 7ace5b5056 Remove /ceph/cmd pipe for (most) Ceph commands
Addresses #80
2020-02-08 23:40:02 -05:00
Joshua Boniface 37310e5455 Correct name of systemd target 2020-02-08 20:39:07 -05:00
Joshua Boniface ce985234c3 Use consistent naming of components
Rename "pvcd" to "pvcnoded", and "pvc-api" to "pvcapid" so names for the
daemons are fully consistent. Update the names of the configuration
files as well to match this new formatting.

References #79
2020-02-08 19:34:07 -05:00
Joshua Boniface 4505b239eb Rename API and common Debian packages
Closes #79
2020-02-08 18:50:38 -05:00
Joshua Boniface 74228eb063 Bump version to 0.6 2020-02-08 18:27:39 -05:00
Joshua Boniface 90e42683c6 Reduce sleep time during VM migrations 2020-02-04 17:52:37 -05:00
Joshua Boniface 20c8466296 Handle invalid search fields better 2020-02-04 17:35:24 -05:00
Joshua Boniface ab28bf40d1 Change ordering of services during primary switch
Fixes #77
2020-01-30 09:18:56 -05:00
Joshua Boniface 5d73974e95 Fix several bugs around load-based migrations 2020-01-29 17:35:10 -05:00
Joshua Boniface 0b31bab797 Add more helpful config parse error message 2020-01-22 12:09:31 -05:00
Joshua Boniface 4c1b78d7a4 Use dictionary get() to prevent crashes
Use the get() function throughout to prevent crashes in various
scenarios if the profile data isn't present or consistent.
2020-01-13 09:21:57 -05:00
Joshua Boniface 4ad29f669d Update default configuration samples 2020-01-12 21:33:15 -05:00
Joshua Boniface 0d2e22a111 Normalize all static networks with bridges
Modifies the storage and upstream networks to mirror the cluster
network, with a bridge on top of the underlying specified dev, and all
IPs bound to the bridge.

Allows creating VMs in the storage or upstream networks, as well as the
cluster network, should the administrator choose to do so (manually).
2020-01-12 19:04:31 -05:00
Joshua Boniface 1671a87dd4 Fix the flush service 2020-01-11 17:04:12 -05:00
Joshua Boniface b6474198a4 Implement cluster maintenance mode
Implements a "maintenance mode" for PVC clusters. For now, the only
thing this mode does is disable node fencing while the state is true.
This allows the administrator to tell PVC that network connectivity,
etc. might be interrupted and to avoid fencing nodes.

Closes #70
2020-01-09 10:53:27 -05:00
Joshua Boniface 4e5bce4975 Update copyright header year to 2020 2020-01-08 19:38:02 -05:00
Joshua Boniface c515d63340 Add provision state for VMs 2020-01-08 17:40:02 -05:00
Joshua Boniface 21d87f5e51 Add v6 configurations to dnsmasq
These options were only applied with v4 networks; now, use the v6
address in a dual-stack or v6-only network.
2020-01-06 23:48:04 -05:00
Joshua Boniface f326fd99e2 Properly fix IPv4 no-DHCP networking 2020-01-06 22:31:37 -05:00
Joshua Boniface 38dae8b32f Change name of cluster in patronictl command 2020-01-06 16:37:17 -05:00
Joshua Boniface 2d2bdb879e Use get() instead of direct dict reference 2020-01-06 16:34:39 -05:00
Joshua Boniface 30d4470c8f Only print AXFR errors in debug mode 2020-01-06 16:04:37 -05:00
Joshua Boniface bbfadac5e1 Fix dnsmasq options for DHCP-disabled networks 2020-01-06 16:04:26 -05:00
Joshua Boniface 7b3e267f7a Implement bridge_device for bridged VNIs
Required due to #64. Bridged networks were being created on top of a
vLAN if the Cluster network was a vLAN device, rather than being created
on the underlying device. This came from a previous revision of the
cluster architecture guidelines where Cluster was supposed to be a raw
device rather than a vLAN. This fixed the problem by implementing a
configuration field for a "bridge_device", a NIC device that can then
have the bridged vLANs created on top of it.

Fixes #64
2020-01-06 14:44:56 -05:00
Joshua Boniface 094ac8c3a8 Ensure stdout is used 2020-01-06 12:34:35 -05:00
Joshua Boniface 13548b791d Add additional debugging and fix pool_idx loop var 2020-01-06 11:31:22 -05:00
Joshua Boniface e7bc4f7328 Handle empty None-type hostname 2020-01-05 22:46:56 -05:00
Joshua Boniface be20ba02a7 Handle VM states in flush more accurately
We don't want to block forever on a failure, so limit valid waiting
states to just those we know it should be in during a migration.
2020-01-05 15:21:16 -05:00
Joshua Boniface 7311fa561b Fix bad join with new table name 2020-01-04 15:17:27 -05:00
Joshua Boniface bf89050e8b Update userdata table name 2020-01-04 15:10:37 -05:00
Joshua Boniface 20ae2186f9 Run VM state actions in a thread
Prevents blocking the main thread(s) while a VM is changing state. In
particular, this caused some issues with nodes not responding to
cancellation/reversal of a flush/ready state until the previous
migration was finished, which could cause issues. This entire subset of
actions is now threaded and so can run on its own in the background.
2019-12-26 11:08:16 -05:00
Joshua Boniface b3483fa810 Add explicit returns from flush/ready threads 2019-12-26 11:08:00 -05:00
Joshua Boniface 47cf0a8006 Ensure migration out occurs 2019-12-25 21:11:02 -05:00
Joshua Boniface 77db36a891 Ensure migration out occurs 2019-12-25 21:02:46 -05:00
Joshua Boniface 9a39d739e8 Ensure we empty of flush_thread 2019-12-25 20:29:17 -05:00
Joshua Boniface a66b834ae4 Fix several small bugs 2019-12-19 18:58:53 -05:00
Joshua Boniface b17b7bf22b Add black magic to minimize ping losses
This particular arping interval/count, along with forcing it to run in
the foreground, seems to minimize the packet loss when the primary
coordinator transitions. Through extensive testing, this value results
in the, consistently, least amount of loss: 1-2 pings, at an 0.025s ping
interval, return "TTL exceeded", with no other loss, and only when the
node the test VM is on is the one switching to secondary state. No other
combination of values here, nor tweaks to other parts of the code, seem
able to reduce this further, therefore this is likely the best
configuration possible.
2019-12-19 18:57:32 -05:00
Joshua Boniface 8c252aeecc Implemented coordinated locked node transitions
The previous method was a "throw it in the sea"-type migration with some
(very arbitrary) sleep statements thrown in for good measure.
Reimplement this with some hard locking. During each phase of the
transition, the nodes acquire read/write shared locks to a Zookeeper key
so that they can tightly coordinate the actions of transferring each
part of the primary state between them. This is done in a subthread to
prevent strange blocking issues that were encountered, likely due to
business in the existing main thread.
2019-12-19 10:56:34 -05:00
Joshua Boniface 0841ddf8b0 Handle integrity errors in DNS aggregator 2019-12-19 10:45:06 -05:00
Joshua Boniface 98764f1edd Clean up some aspects of node switchover 2019-12-18 21:39:40 -05:00
Joshua Boniface 23188199cb Handle failing Patroni events more gracefully 2019-12-18 21:12:22 -05:00
Joshua Boniface 2b1b78622e Fix invalid arping option
It made little difference and didn't error, but was incorrect.
2019-12-18 12:06:40 -05:00
Joshua Boniface 364ab10673 Add slight delay when stopping the metadata API 2019-12-18 11:56:04 -05:00
Joshua Boniface 39c9f911cc Increase arping interval to 0.2s 2019-12-15 14:55:34 -05:00
Joshua Boniface 686af31c08 Reduce arping interval to 0.1s 2019-12-15 12:30:45 -05:00
Joshua Boniface 0a94fac407 Fix bugs around passing master
Was not passing properly and getting stuck sometimes, so modify the
checking and route creation a bit to prevent it. Seems to work.
2019-12-15 00:08:18 -05:00
Joshua Boniface b3e21a5bf8 Integrate metadata API into node daemon 2019-12-14 16:41:01 -05:00
Joshua Boniface 8c36e7618a Modify node daemon to follow API 2019-12-14 14:13:26 -05:00
Joshua Boniface 78f053d81f Recreate network in aggregator if DNS changes 2019-12-13 00:03:47 -05:00
Joshua Boniface 0a8dd30a48 Restart dnsmasq when network details change 2019-12-12 23:51:22 -05:00
Joshua Boniface 6fa828e721 Don't stop the provisioner worker
It should probably just be running on all nodes all the time already,
but is started when a node first becomes primary.
2019-12-12 23:08:02 -05:00
Joshua Boniface c1b6ce0ff7 Reorder starting clients 2019-12-12 23:03:34 -05:00
Joshua Boniface b854d53fab Add API management to node daemon 2019-12-12 22:59:07 -05:00
Joshua Boniface 88a181b20d Allow metadata API in nft rules 2019-12-11 17:04:29 -05:00
Joshua Boniface 1fb560e996 Add DNS nameservers to networks 2019-12-08 23:55:45 -05:00
Joshua Boniface 9cb5561e77 Move default NS record to upstream_domain 2019-12-08 23:05:32 -05:00
Joshua Boniface 3471f4e57a Remove obsolete pvc-nsX and add pvc-ns name
Should point towards the floating IP.
2019-12-08 20:20:20 -05:00
Joshua Boniface 356c12db2e Add ceph df output to pool data
Allows additional information visible in the `ceph df` command,
including pool free space and used percentage.
2019-12-06 00:47:27 -05:00
Joshua Boniface 531578fd28 Use consistent tense for VM states
Replace "failed" with "fail" and "disabled" with "disable" for
consistency with the remaining states.
2019-10-23 23:57:59 -04:00
Joshua Boniface 040ca33683 Clean up handling of OSD dump command 2019-10-22 12:51:29 -04:00
Joshua Boniface 190623bdd9 Use empty string for node limit 2019-10-22 12:32:14 -04:00
Joshua Boniface f0e0a38a20 Fix bug in config element retrieval 2019-10-22 12:30:23 -04:00
Joshua Boniface 237a37015d Set upstream IP in key if changed 2019-10-21 16:50:41 -04:00
Joshua Boniface 10ae260b92 Properly handle empty node limit 2019-10-17 13:34:11 -04:00
Joshua Boniface 03447d3374 Update copyright string year to include 2019 2019-10-13 12:09:51 -04:00
Joshua Boniface 116013695f Fix bugs with bad strings 2019-10-12 18:43:29 -04:00
Joshua Boniface 18fc49fc6c Use node instead of hypervisor consistently 2019-10-12 01:59:08 -04:00
Joshua Boniface 8dc0c8f0ac Fix minor bugs 2019-10-12 01:36:50 -04:00
Joshua Boniface 5995353597 Implement VM metadata and use it
Implements the storing of three VM metadata attributes:
1. Node limits - allows specifying a list of hosts on which the VM must
run. This limit influences the migration behaviour of VMs.
2. Per-VM node selectors - allows each VM to have its migration
autoselection method specified, to automatically allow different methods
per VM based on the administrator's preferences.
3. VM autorestart - allows a VM to be automatically restarted from a
stopped state, presumably due to a failure to find a target node (either
due to limits or otherwise) during a flush/fence recovery, on the next
node unflush/ready state of its home hypervisor. Useful mostly in
conjunction with limits to ensure that VMs which were shut down due to
there being no valid migration targets are started back up when their
node becomes ready again.

Includes the full client interaction with these metadata options,
including printing, as well as defining a new function to modify this
metadata. For the CLI it is set/modified either on `vm define` or via the
`vm meta` command. For the API it is set/modified either on a POST to
the `/vm` endpoint (during VM definition) or on POST to the `/vm/<vm>`
endpoint. For the API this replaces the previous reserved word for VM
creation from scratch as this will no longer be implemented in-daemon
(see #22).

Closes #52
2019-10-12 01:17:39 -04:00
Joshua Boniface 76e6b42389 Add clone_volume backend command 2019-10-10 14:09:07 -04:00
Joshua Boniface 983daceaed Fix shutdown abort during restart
Restart state, being different from shutdown, would trigger an abort of
the shutdown. Fix this by including restart in the valid states to
continue.
2019-09-07 12:08:31 -04:00
Joshua Boniface 7c4d18691a Implement configurable replcfg (node-side)
Implements administrator-selectable replication configurations for new
pools in PVC clusters, overriding the default of copies=3,mincopies=2.
2019-08-23 21:58:54 -04:00
Joshua Boniface 267a3d16e5 Bump version to 0.5 2019-08-08 20:56:27 -04:00
Joshua Boniface 2880a761c0 Move Ceph command pipe to new location
Matching the new /cmd/domain pipe, move Ceph pipe to /cmd/ceph.
2019-08-07 14:47:27 -04:00
Joshua Boniface b7546e3711 Fix bugs in command pipeline for VMs 2019-08-07 14:13:01 -04:00
Joshua Boniface 0ff2d7d537 Use shlex for command splitting
This will preserve quoted strings, required for the rbd lock commands.
2019-08-07 14:02:57 -04:00
Joshua Boniface a2a630f6a0 Add pipeline for VM lock flush cmd 2019-08-07 13:49:33 -04:00
Joshua Boniface 496216321e Move lock flushing to VMInstance
Prepares for reuse of this function via client commands.
2019-08-07 13:36:56 -04:00
Joshua Boniface 0446b2db02 Catch exceptions if Patroni is not up 2019-08-07 11:46:58 -04:00
Joshua Boniface 7e77752ce5 Add limit to Patroni switchover attempts 2019-08-07 11:46:42 -04:00
Joshua Boniface 33a963c2af Improve fence output on failure and increase delay 2019-08-07 11:35:49 -04:00
Joshua Boniface e92a57606d Use better forceful arping command
Send ARP responses with the source IP in it to force update even if the
old primary did not cleanly terminate (during fencing for instance).
2019-08-07 11:29:38 -04:00
Joshua Boniface ef3b6b3723 Arping 3 times instead of 2
During fence 2 is not always enough for the network to recognize the
change in primary coordinator.
2019-08-07 11:15:36 -04:00
Joshua Boniface 3b27a88128 Allow abort of shutdown state
Adds some logic to allow an active shutdown state to be aborted by
changing the VM to another state. Useful mostly if a VM is doing funky
things and not responding to the shutdown, but the administrator either
doesn't want to wait for the timer to expire (forcing an immediate
termination) or wishes to abort the shutdown attempt.

Fixes #49
2019-08-07 10:58:18 -04:00
Joshua Boniface e2ae58b62c Add the missing newline to the string compare 2019-08-04 17:00:33 -04:00
Joshua Boniface d0d5ab4425 Fix bug if the switchover target is the same 2019-08-04 16:51:11 -04:00
Joshua Boniface a329376d33 Lock primary_node key during primary switchover
Also implements a looping to switch over the Patroni leader to ensure
this always follows the primary and clean up the code around here a bit.
2019-08-04 16:42:06 -04:00
Joshua Boniface 710d2cf9c2 Fix record duplication bug and general cleanup
Fixes #47
2019-08-01 13:11:45 -04:00
Joshua Boniface 8bdec03cf1 Properly support debug logging via config 2019-08-01 11:22:27 -04:00
Joshua Boniface c6e58796ba Clean up redundant return section 2019-07-31 23:57:31 -04:00
Joshua Boniface 7380f45b1b Improve dnsmasq interface handling
listen-address is enough; adding interface too causes weird issues where
dnsmasq is listening on an IPv6 global wildcard too which conflicts with
the PowerDNS instance.
2019-07-31 10:03:56 -04:00
Joshua Boniface 324990739e Make DNS aggregator listen on port 53
Using the non-standard port was a pain. Now that all the DNSMasq stuff
works, move back to the default port.
2019-07-30 09:20:01 -04:00
Joshua Boniface 717d00cfcf Implement snapshot rename in node daemon
[4/2] Implements #44
2019-07-28 23:06:12 -04:00
Joshua Boniface 83b806d0b5 Move intervals config one level up
Makes for a slightly-better-organized configuration and explanation.
2019-07-28 19:33:23 -04:00
Joshua Boniface 68ca493b3b Fix bad error code 2019-07-26 20:53:01 -04:00
Joshua Boniface 837666a15e Revamp renamekey function
The function had numerous bugs and didn't work. Fix them up.
2019-07-26 16:38:05 -04:00
Joshua Boniface 35363671a0 Implement Ceph volume resize and rename
Includes a simple implementation of a zookeeper "rename" facility,
allowing a key and all data to be replaced by a new key with a different
name but containing all the same child elements and data.

[2/2] Implements #44
2019-07-26 15:13:21 -04:00
Joshua Boniface 50367c9190 Improve OSD create messages 2019-07-26 11:41:51 -04:00
Joshua Boniface 96bc181877 Set the routerstate on daemon startup
Allows switching from coordinator to not coordinator with a service
restart.
2019-07-12 09:51:56 -04:00
Joshua Boniface 2a220cd16e Nicer colour output for coordinator state client 2019-07-12 09:31:42 -04:00
Joshua Boniface 439c5f18c3 Add router_state to output of keepalives 2019-07-11 20:11:05 -04:00
Joshua Boniface f30be555c1 Improve message output for logging
Improve some formatting of the messages being printed to make it nicer
for long-term logging.
2019-07-10 22:38:32 -04:00
Joshua Boniface ac36870a86 Implement hup for log rotation
This function was long-existent, but never used; implement it.
2019-07-10 22:22:02 -04:00
Joshua Boniface 58f4222ee7 Support disabling log colours and dates
For usecases such as a pure-syslog, allow disabling of dates or colours
in the log messages (separately).
2019-07-10 22:17:23 -04:00
Joshua Boniface 32a6369de2 Add nicer message when live migrate fails 2019-07-10 17:42:24 -04:00
Joshua Boniface 8a28738bff Use consistent terminology in fence message 2019-07-10 11:54:56 -04:00
Joshua Boniface 8f160abf90 Handle cancelling flushes when new ones run
Store the flush_thread of a node as a class object. Before starting a
new flush thread (either flush or unflush), stop the existing one if it
exists to prevent further migrations, then start the new thread. Set the
object to None on init and again once the task actually finishes. Remove
the inflush flag as this is not required when using these threads and
functionally does nothing any longer, but add the flush_stopper flag to
trigger cancellation of the current job.
2019-07-10 11:54:34 -04:00
Joshua Boniface c7c8c8bcbb Fix bug with flush 2019-07-10 00:43:55 -04:00
Joshua Boniface 7a8aee9fe7 Remove flush locking functionality
This just seemed like more trouble that it was worth. Flush locks were
originally intended as a way to counteract the weird issues around
flushing that were mostly fixed by the code refactoring, so this will
help test if those issues are truly gone. If not, will look into a
cleaner solution that doesn't result in unchangeable states.
2019-07-09 23:59:17 -04:00
Joshua Boniface ad284b13bc Fix bugs with fencing 2019-07-09 19:17:53 -04:00
Joshua Boniface 7df200ac44 Improve ZK connection loss handling 2019-07-09 19:17:32 -04:00
Joshua Boniface 47f86475f8 Handle failures of Ceph commands gradefully
If these commands fail, catch the error, print a message, and set up
empty lists. Also handle later data parsing in this case.
2019-07-09 16:43:38 -04:00
Joshua Boniface 1a8e7509f7 Support run_os_command timeout; use timeouts 2019-07-09 15:09:13 -04:00
Joshua Boniface 83a4140703 Allow enabling debug mode in config
Makes debugging easier without modifying code.
2019-07-09 14:59:00 -04:00
Joshua Boniface 8eeba9bc9b Make Ceph commands time out if needed 2019-07-09 14:35:53 -04:00
Joshua Boniface 19701c66e4 Move fencing to after keepalive output
Just makes the messages a little easier to read when triggered.
2019-07-09 14:24:31 -04:00
Joshua Boniface 17dfaf43c5 Move hypervisor selection out to common 2019-07-09 14:20:58 -04:00
Joshua Boniface b551b54642 Rename message when contending 2019-07-09 14:03:48 -04:00
Joshua Boniface 4249d5d982 Always load and store IPMI on daemon start
Without this, the IPMI information set during initial node creation can
never be changed, which can cause issues later. Instead, always set it
fresh on each node boot.
2019-07-09 14:00:31 -04:00
Joshua Boniface 7f828a27a5 Free RBD locks when fencing node 2019-07-09 10:59:31 -04:00
Joshua Boniface bc54ea2449 Log message when starting or stopping API client 2019-07-08 19:29:49 -04:00
Joshua Boniface cda690e94f Set RADOS df information in ZK 2019-07-08 10:19:56 -04:00
Joshua Boniface d9ebd04264 Fix missing dom_uuid values in data reads 2019-07-07 15:30:28 -04:00
Joshua Boniface b82ccaa84d Improve flush handling
Similar to recent client changes, don't replace the previous node record
of an already-migrated VM. Wait for shutdown if required. Use a
continue statement instead of a needless else block.
2019-07-07 15:27:37 -04:00
Joshua Boniface 0d398f663b Rename "Domain" to "VM" in various class names
The name "Domain", though technically correct from a Libvirt
perspective, was unnecessarily confusing. Call the class instances what
they are, VMs.
2019-07-07 15:20:37 -04:00
Joshua Boniface 8216125b02 Enable autostart of API client on Primary
Adds a config flag that turns on the API client following the Primary
coordinator. The retcode of the start/stop commands is ignore so this
can fail gracefully if e.g. the client isn't installed.
2019-07-06 02:42:56 -04:00
Joshua Boniface e6012965f1 Add YAML header to sample config files 2019-07-06 02:24:35 -04:00
Joshua Boniface 3e591bd09e Remove extra whitespaces on blank lines 2019-06-25 22:33:23 -04:00
Joshua Boniface 08cb16bfbc Revamp VM migration handling
This was very old code that was hard to follow and quite fragile, with
failures and infinite loops occurring fairly frequently. These changes
make the code more robust, including the addition of timeouts, some code
cleanup, and some improvements to the logical flow.

Also forces the libvirt migration to occur on the cluster network, which
couples to changes in the libvirtd listen (via pvc-ansible) and in
Daemon.py via the previous commit.
2019-06-25 22:23:48 -04:00
Joshua Boniface d336fce253 Connect to actual IP not localhost for Libvirt 2019-06-25 22:09:32 -04:00
Joshua Boniface 75d0e7f989 Revert "Only perform fencing duties on primary"
This reverts commit 464c69aac6.

Actually, yea, this made sense - if the primary fails, it can't
fence itself.
2019-06-25 12:36:48 -04:00
Joshua Boniface 85a5a8a0c9 Disable tx offloading on bridge interfaces
Reference: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=717215#68

Without this, DHCP fails when traversing only the local bridge, for
Debian Jessie or earlier (and possibly other OSes as well), due to the
missing UDP checksums. This disables the offload and hence reenables
the checksums even on the software-only bridge.

Also rearranged the steps and added comments arround this section to
better clarify what each command is doing.
2019-06-25 12:36:37 -04:00
Joshua Boniface 464c69aac6 Only perform fencing duties on primary
There was really no need for this to be shared among all the
coordinators, which seemed more fragile. This way only the primary will
try to fence dead nodes.
2019-06-24 20:17:51 -04:00
Joshua Boniface 249611b161 Remove duplicate import 2019-06-24 20:14:43 -04:00
Joshua Boniface ef272b0b7d Add removal confirmations and zap disk before add 2019-06-21 15:52:28 -04:00
Joshua Boniface 867ad1fc1b Support human-readable biconversion and in volumes 2019-06-21 09:23:52 -04:00
Joshua Boniface ddedb1a992 Set image features to supported values 2019-06-19 15:19:36 -04:00
Joshua Boniface 0f15e7cda5 Set shutdown state after final keepalive 2019-06-19 14:52:47 -04:00
Joshua Boniface 0060c0313b Put daemonstate to shutdown when stopping
This way it isn't "run" all the way until it shuts down.
2019-06-19 14:23:07 -04:00
Joshua Boniface 9a0554fdbe Remove all volumes from pool on removal
Technically not needed, but otherwise random errors may be thrown,
so best to be explicit.
2019-06-19 12:49:03 -04:00
Joshua Boniface 87907d4ce8 Remove size field from volume objects
This data is just in the stats anyways.
2019-06-19 10:45:14 -04:00
Joshua Boniface 09562fdc06 Output in json format instead 2019-06-19 10:32:01 -04:00
Joshua Boniface a940d03959 Fix some bugs and add RBD volume stats 2019-06-19 10:25:22 -04:00
Joshua Boniface db0b382b3d Don't bother with snapshot management by Daemon
This is *definitely* not needed in the end, and just uses RAM for
no conceivable purpose. Snapshots are fully client-managed.
2019-06-19 09:43:04 -04:00
Joshua Boniface 1c9f606480 Implement volume and snapshot handling by daemon
This seems like a super-gross way to do this, but at the moment
I don't have a better way. Maybe just remove this component since
none of the volume/snapshot stuff is dynamic; will see as this
progresses.
2019-06-19 09:40:32 -04:00
Joshua Boniface 784b428ed0 Add creation of volume and snapshot lists 2019-06-19 09:29:36 -04:00
Joshua Boniface 064e6455bc Correct some more bugs 2019-06-19 00:29:21 -04:00
Joshua Boniface a4ab3075ab Correct some bugs around new code 2019-06-19 00:23:25 -04:00
Joshua Boniface 01959cb9e3 Implementation of RBD volumes and snapshots
Adds the ability to manage RBD volumes (add/remove) and RBD
snapshots (add/remove). (Working) list functions to come.
2019-06-19 00:12:44 -04:00
Joshua Boniface 2bbbda3da5 Only trigger pool updates on primary 2019-06-18 21:26:05 -04:00
Joshua Boniface 612f5ab52c Strip pv_block from stdout 2019-06-18 20:34:25 -04:00
Joshua Boniface 1622226c32 Add more logging during OSD creation/deletion 2019-06-18 20:31:04 -04:00
Joshua Boniface 3adeef6fdd Use the fsid to activate new OSDs 2019-06-18 20:22:28 -04:00
Joshua Boniface 443108f53d Add support for enable/disable keepalive detail 2019-06-18 19:54:42 -04:00
Joshua Boniface 79f284a0a9 Pass logger into run_command 2019-06-18 13:45:59 -04:00
Joshua Boniface 080ca3201c Correct actual problem with this_node 2019-06-18 13:43:54 -04:00
Joshua Boniface d076f9f4eb Use self.this_node everywhere 2019-06-18 13:25:16 -04:00
Joshua Boniface aee078f3eb Support disabling keepalive logging 2019-06-18 12:44:07 -04:00
Joshua Boniface b0411e8e1a Remove "error" message from Ceph commands
This triggeres at every node start and isn't useful.
2019-06-18 12:41:38 -04:00
Joshua Boniface 8d9007f697 Remove OSD stat collection if count is zero
Otherwise, ceph osd df will hang indefinitely trying to get data
for the zero OSDs.
2019-06-18 12:36:53 -04:00
Joshua Boniface 5a327dc41a Clean up Ceph pipeline and add more debug logs 2019-06-18 11:19:03 -04:00
Joshua Boniface 46a416bc78 Use a proper variable for vni_mtu 2019-06-18 00:01:12 -04:00
Joshua Boniface 1f92b90a3e Don't encode initial data as we're using zkhander 2019-06-17 23:53:16 -04:00
Joshua Boniface d4ebe63d9b Rename network device field
It seems much nicer and more consistent as "device" rather than as
"name".
2019-06-17 23:44:41 -04:00
Joshua Boniface 1d3f868206 Unify network devices and addresses in config
The old way of doing this was a little cumbersome, with an upper YAML
tree split between "devices" (name and MTU) and addresses. This commit
unifies these under the root "networking" section to make this section
clearer.
2019-06-17 23:41:07 -04:00
Joshua Boniface e70255dbd6 Support configurable interface MTUs
MTUs were hardcoded at 9000, which breaks if the underlying interface
or network switch does not support jumbo frames, a possible deployment
limitation. This has non-obvious consequences due to MTU mismatches
for certain services (Ceph, Zookeeper, etc.).

This commit adds support for configurable MTUs for each interface,
set in pvcd.yaml. The example has been updated to reflect this, with
a default of 1500 (the Ethernet standard).

This commit also adds autoconfiguration of the VNI device MTU based
on the `vni_mtu` value, the same for bridge networks and minus 50
(rather than 200 from the hardcoded value, based on the following
resource [1]) for VXLAN networks.

[1] http://ipengineer.net/2014/06/vxlan-mtu-vs-ip-mtu-consideration/
2019-06-17 23:34:48 -04:00
Joshua Boniface c583ee1709 Revert "Wait a little longer"
This reverts commit bd7a55e9e1.

This is not really needed, but do keep the 5s wait
2019-06-17 21:56:06 -04:00
Joshua Boniface bd7a55e9e1 Wait a little longer 2019-06-17 12:14:13 -04:00
Joshua Boniface 23994f8a11 Increase wait time for daemons and log message 2019-06-17 10:30:46 -04:00
Joshua Boniface fe654aa5a2 Correct typo in daemon 2019-06-16 19:27:20 -04:00
Joshua Boniface 14e9ba892c Wait on both sides for 30s
Still finding issues with the flush
2019-05-24 01:23:18 -04:00
Joshua Boniface ae37afcf75 Wait 10 seconds when starting pvc-flush
Without waiting the unflush will trigger too soon, before the
daemon is fully ready and such it fails in odd ways.
2019-05-23 23:35:01 -04:00
Joshua Boniface e8b666708c Add one final keepalive update before exiting 2019-05-23 23:23:03 -04:00
Joshua Boniface 4c5ce9b995 Perform additional tweaks to units
Use RemainAfterExit to avoid pvc-flush from auto-stopping immediately.

Use PartOf to tie services to the target itself.

Use --wait on flush to avoid daemon stopping before flush is complete.
2019-05-23 23:18:28 -04:00
Joshua Boniface e46aa22989 Remove invalid Restart in pvc-flush.service 2019-05-23 22:51:36 -04:00
Joshua Boniface 7c6132f7dd Add node autoflush service and target
Add a systemd service to manage node flush/unflush, useful during
system startup and shutdown to avoid requiring administrator
intervention for this to occur. This is optional and the service is
not enabled by default, and the postinst script informs the
administrator of this.

Also adds a systemd target to collect the two service units together
and provide an easy way to flush+shutdown or startup+unflush the
entire PVC system.

Closes #28
2019-05-23 22:42:51 -04:00
Joshua Boniface 8ef21cf9f2 Sleep longer before removing gateways
1 second was just slightly too little time to wait and packets would
occasionally be lost on primary switchover. Increase this to 2
seconds to provide more time for arping to run on the new primary.
2019-05-23 22:20:38 -04:00
Joshua Boniface 8881b97e8b Correct a missing capitalization 2019-05-21 23:19:19 -04:00
Joshua Boniface 3893666507 Improve performance by removing spurious actions
1. Remove a number of time.sleep commands which don't really seem
necessary any longer and which significantly increased the startup
time while parsing the VM list.
2. Handle some variable sets during initialization of the object,
rather than waiting for a management command, enabling...
3. Know when a state change, and the corresponding Libvirt lookup,
is unnecessary due to the target node not matching the current node.
This also removes a number of unremovable errors from Libvirt on the
console which were annoying.

This reduces the total time taken by the VM startup segment (lines
760-762 of Daemon.py) from 17.117s down to 0.976s for 82 VMs.
2019-05-21 22:56:40 -04:00
Joshua Boniface 595cf1782c Switch DNS aggregator to PostgreSQL
MariaDB+Galera was terribly unstable, with the cluster failing to
start or dying randomly, and generally seemed incredibly unsuitable
for an HA solution. This commit switches the DNS aggregator SQL
backend to PostgreSQL, implemented via Patroni HA.

It also manages the Patroni state, forcing the primary instance to
follow the PVC coordinator, such that the active DNS Aggregator
instance is always able to communicate read+write with the local
system.

This required some logic changes to how the DNS Aggregator worked,
specifically ensuring that database changes aren't attempted while
the instance isn't actively running - to be honest this was a bug
anyways that had just never been noticed.

Closes #34
2019-05-21 01:07:41 -04:00
Joshua Boniface 9e806d30f9 Only stop log parser if it's actually running 2019-05-11 12:09:42 -04:00
Joshua Boniface 3cf573baf6 Update domainstate after unflush is complete 2019-05-11 00:55:15 -04:00
Joshua Boniface 18a122c772 Remove redundant try block 2019-05-11 00:47:50 -04:00
Joshua Boniface 516ea1b57c Handle unflushes like flushes squentially
Makes an unflush a controlled event like flushing, rather than a
free-for-all. This does slow down unflushing somewhat (disallowing
parallelism from multiple hosts to the current host), but allows
the locking to actually be effective.
2019-05-11 00:30:47 -04:00
Joshua Boniface 62a71af46e Implement locking for unflush as well
References #32
2019-05-11 00:13:03 -04:00
Joshua Boniface 9d8c886811 Correct typo in flush_lock write 2019-05-11 00:08:07 -04:00
Joshua Boniface c19902d952 Implement flush locking for nodes
Implements a locking mechanism to prevent clobbering of node
flushes. When a flush begins, a global cluster lock is placed
which is freed once the flush completes. While the lock is in place,
other flush events queue waiting for the lock to free before
proceeding.

Modifies the CLI output flow when the `--wait` option is specified.
First, if a lock exists when running the command, the message is
tweaked to indicate this, and the client will wait first for the
lock to free, and then for the flush as normal. Second, the wait
depends on the active lock rather than the domain_status for
consistency purposes.

Closes #32
2019-05-10 23:52:24 -04:00