Commit Graph

24 Commits

Author SHA1 Message Date
Joshua Boniface 4e5bce4975 Update copyright header year to 2020 2020-01-08 19:38:02 -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 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 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 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 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 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 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 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 1a8e7509f7 Support run_os_command timeout; use timeouts 2019-07-09 15:09:13 -04:00
Joshua Boniface 17dfaf43c5 Move hypervisor selection out to common 2019-07-09 14:20:58 -04:00
Joshua Boniface bfbe9188ce Finish setup of Ceph OSD addition and basic management 2018-10-29 17:51:25 -04:00
Joshua Boniface d8796fd6d6 Move IP creation/removal to common function 2018-10-27 16:31:31 -04:00
Joshua Boniface 187a572c13 Make a whole bunch of things work 2018-10-17 20:05:22 -04:00
Joshua Boniface 87d1c7513e Add floating IPs and better termination of daemons 2018-10-17 00:23:43 -04:00
Joshua Boniface a2a7a1d790 Support logging of daemon directly to a file 2018-10-15 21:07:00 -04:00
Joshua Boniface 2e2459c63c Some cleanups and fix bridge interface bug 2018-10-14 18:35:57 -04:00
Joshua Boniface f198f62563 Massive rejigger into single daemon
Completely restructure the daemon code to move the 4 discrete daemons
into a single daemon that can be run on every hypervisor. Introduce the
idea of a static list of "coordinator" nodes which are configured at
install time to run Zookeeper and FRR in router mode, and which are
allowed to take on client network management duties (gateway, DHCP, DNS,
etc.) while also allowing them to run VMs (i.e. no dedicated "router"
nodes required).
2018-10-14 02:40:54 -04:00