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[#5] Update the writer functions too

This commit is contained in:
Joshua Boniface 2018-06-26 22:52:55 -04:00
parent 4737556c2c
commit 276b618137
4 changed files with 21 additions and 28 deletions
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7
pvcd.py
View File

@ -34,6 +34,7 @@ import configparser
import apscheduler.schedulers.background
import pvcd.ansiiprint as ansiiprint
import pvcd.zkhandler as zkhandler
import pvcd.VMInstance as VMInstance
import pvcd.NodeInstance as NodeInstance
@ -145,7 +146,7 @@ zk_conn.add_listener(zk_listener)
def cleanup(signum, frame):
ansiiprint.echo('Terminating daemon', '', 'e')
# Set stop state in Zookeeper
zk_conn.set('/nodes/{}/daemonstate'.format(myhostname), 'stop'.encode('ascii'))
zkhandler.writedata(zk_conn, '/nodes/{}/daemonstate'.format(myhostname), [ 'stop' ])
# Close the Zookeeper connection
zk_conn.close()
# Stop keepalive thread
@ -179,7 +180,7 @@ print(' {0}Kernel:{1} {2}'.format(ansiiprint.bold(), ansiiprint.end(), staticda
if zk_conn.exists('/nodes/{}'.format(myhostname)):
print("Node is " + ansiiprint.green() + "present" + ansiiprint.end() + " in Zookeeper")
# Update static data just in case it's changed
zk_conn.set('/nodes/{}/staticdata'.format(myhostname), ' '.join(staticdata).encode('ascii'))
zkhandler.writedata(zk_conn, '/nodes/{}/staticdata'.format(myhostname), [ ' '.join(staticdata) ])
else:
print("Node is " + ansiiprint.red() + "absent" + ansiiprint.end() + " in Zookeeper; adding new node")
keepalive_time = int(time.time())
@ -201,7 +202,7 @@ else:
transaction.create('/nodes/{}/ipmipassword'.format(myhostname), config['ipmi_password'].encode('ascii'))
transaction.commit()
zk_conn.set('/nodes/{}/daemonstate'.format(myhostname), 'init'.encode('ascii'))
zkhandler.writedata(zk_conn, '/nodes/{}/daemonstate'.format(myhostname), [ 'init' ])
t_node = dict()
s_domain = dict()

14
pvcd/NodeInstance.py
View File

@ -162,14 +162,14 @@ class NodeInstance():
transaction.set_data('/domains/{}/lasthypervisor'.format(dom_uuid), current_hypervisor.encode('ascii'))
transaction.commit()
self.zk_conn.set('/nodes/{}/runningdomains'.format(self.name), ''.encode('ascii'))
self.zk_conn.set('/nodes/{}/domainstate'.format(self.name), 'flushed'.encode('ascii'))
zkhandler.writedata(self.zk_conn, '/nodes/{}/runningdomains'.format(self.name), [ '' ])
zkhandler.writedata(self.zk_conn, '/nodes/{}/domainstate'.format(self.name), [ 'flushed' ])
self.inflush = False
def unflush(self):
self.inflush = True
ansiiprint.echo('Restoring node {} to active service.'.format(self.name), '', 'i')
self.zk_conn.set('/nodes/{}/domainstate'.format(self.name), 'ready'.encode('ascii'))
zkhandler.writedata(self.zk_conn, '/nodes/{}/domainstate'.format(self.name), [ 'ready' ])
for dom_uuid in self.s_domain:
last_hypervisor = zkhandler.readdata(self.zk_conn, '/domains/{}/lasthypervisor'.format(dom_uuid))
if last_hypervisor != self.name:
@ -196,7 +196,7 @@ class NodeInstance():
past_state = zkhandler.readdata(self.zk_conn, '/nodes/{}/daemonstate'.format(self.name))
if past_state != 'run':
self.daemon_state = 'run'
self.zk_conn.set('/nodes/{}/daemonstate'.format(self.name), 'run'.encode('ascii'))
zkhandler.writedata(self.zk_conn, '/nodes/{}/daemonstate'.format(self.name), [ 'run' ])
else:
self.daemon_state = 'run'
@ -210,7 +210,7 @@ class NodeInstance():
raise
except Exception as e:
# Toggle a state "change"
self.zk_conn.set('/domains/{}/state'.format(domain), instance.getstate().encode('ascii'))
zkhandler.writedata(self.zk_conn, '/domains/{}/state'.format(domain), [ instance.getstate() ])
# Set our information in zookeeper
self.name = lv_conn.getHostname()
@ -256,7 +256,7 @@ class NodeInstance():
if node_keepalive < node_deadtime and node_daemon_state == 'run':
# CHECK VERSIONING HERE
ansiiprint.echo('Node {} seems dead - starting monitor for fencing'.format(node_name), '', 'w')
self.zk_conn.set('/nodes/{}/daemonstate'.format(node_name), 'dead'.encode('ascii'))
zkhandler.writedata(self.zk_conn, '/nodes/{}/daemonstate'.format(node_name), [ 'dead' ])
fence_thread = threading.Thread(target=fenceNode, args=(node_name, self.zk_conn), kwargs={})
fence_thread.start()
@ -351,7 +351,7 @@ def fenceNode(node_name, zk_conn):
transaction.commit()
# Set node in flushed state for easy remigrating when it comes back
zk_conn.set('/nodes/{}/domainstate'.format(node_name), 'flushed'.encode('ascii'))
zkhandler.writedata(self.zk_conn, '/nodes/{}/domainstate'.format(node_name), [ 'flushed' ])
#
# Perform an IPMI fence

18
pvcd/VMInstance.py
View File

@ -72,7 +72,7 @@ class VMInstance:
# Add the domain to the domain_list array
self.thishypervisor.domain_list.append(self.domuuid)
# Push the change up to Zookeeper
self.zk_conn.set('/nodes/{}/runningdomains'.format(self.thishypervisor.name), ' '.join(self.thishypervisor.domain_list).encode('ascii'))
zkhandler.writedata(self.zk_conn, '/nodes/{}/runningdomains'.format(self.thishypervisor.name), [ ' '.join(self.thishypervisor.domain_list) ])
except Exception as e:
ansiiprint.echo('Error adding domain to list: {}'.format(e), '', 'c')
@ -82,7 +82,7 @@ class VMInstance:
# Remove the domain from the domain_list array
self.thishypervisor.domain_list.remove(self.domuuid)
# Push the change up to Zookeeper
self.zk_conn.set('/nodes/{}/runningdomains'.format(self.thishypervisor.name), ' '.join(self.thishypervisor.domain_list).encode('ascii'))
zkhandler.writedata(self.zk_conn, '/nodes/{}/runningdomains'.format(self.thishypervisor.name), [ ' '.join(self.thishypervisor.domain_list) ])
except Exception as e:
ansiiprint.echo('Error removing domain from list: {}'.format(e), '', 'c')
@ -108,7 +108,7 @@ class VMInstance:
self.dom = dom
except libvirt.libvirtError as e:
ansiiprint.echo('Failed to create VM', '{}:'.format(self.domuuid), 'e')
self.zk_conn.set('/domains/{}/state'.format(self.domuuid), 'failed'.encode('ascii'))
zkhandler.writedata(self.zk_conn, '/domains/{}/state'.format(self.domuuid), [ 'failed' ])
self.dom = None
lv_conn.close()
@ -135,7 +135,7 @@ class VMInstance:
except libvirt.libvirtError as e:
ansiiprint.echo('Failed to restart VM', '{}:'.format(self.domuuid), 'e')
self.zk_conn.set('/domains/{}/state'.format(self.domuuid), 'start'.encode('ascii'))
zkhandler.writedata(self.zk_conn, '/domains/{}/state'.format(self.domuuid), [ 'start' ])
lv_conn.close()
self.inrestart = False
@ -163,7 +163,7 @@ class VMInstance:
self.removeDomainFromList()
if self.inrestart == False:
self.zk_conn.set('/domains/{}/state'.format(self.domuuid), 'stop'.encode('ascii'))
zkhandler.writedata(self.zk_conn, '/domains/{}/state'.format(self.domuuid), [ 'stop' ])
ansiiprint.echo('Successfully stopped VM', '{}:'.format(self.domuuid), 'o')
self.dom = None
@ -191,7 +191,7 @@ class VMInstance:
self.removeDomainFromList()
if self.inrestart == False:
self.zk_conn.set('/domains/{}/state'.format(self.domuuid), 'stop'.encode('ascii'))
zkhandler.writedata(self.zk_conn, '/domains/{}/state'.format(self.domuuid), [ 'stop' ])
ansiiprint.echo('Successfully shutdown VM', '{}:'.format(self.domuuid), 'o')
self.dom = None
@ -237,7 +237,7 @@ class VMInstance:
self.removeDomainFromList()
time.sleep(1)
self.zk_conn.set('/domains/{}/state'.format(self.domuuid), 'start'.encode('ascii'))
zkhandler.writedata(self.zk_conn, '/domains/{}/state'.format(self.domuuid), [ 'start' ])
self.inmigrate = False
# Receive the migration from another host (wait until VM is running)
@ -322,7 +322,7 @@ class VMInstance:
self.addDomainToList()
# VM is already running and should be but stuck in migrate state
elif self.state == "migrate":
self.zk_conn.set('/domains/{}/state'.format(self.domuuid), 'start'.encode('ascii'))
zkhandler.writedata(self.zk_conn, '/domains/{}/state'.format(self.domuuid), [ 'start' ])
self.addDomainToList()
# VM should be restarted
elif self.state == "restart":
@ -342,7 +342,7 @@ class VMInstance:
self.receive_migrate()
# VM should be restarted (i.e. started since it isn't running)
if self.state == "restart":
self.zk_conn.set('/domains/{}/state'.format(self.domuuid), 'start'.encode('ascii'))
zkhandler.writedata(self.zk_conn, '/domains/{}/state'.format(self.domuuid), [ 'start' ])
# VM should be shut down; ensure it's gone from this node's domain_list
elif self.state == "shutdown":
self.removeDomainFromList()

10
pvcd/zkhandler.py
View File

@ -46,8 +46,7 @@ def writedata(zk_conn, key, data):
version = meta.version
new_version = version + 1
zk_transaction = zk_conn.transaction()
for line in data:
zk_transaction.set_data(key, line.encode('ascii'))
zk_transaction.set_data(key, data.encode('ascii'))
try:
zk_transaction.check(key, new_version)
except TypeError:
@ -56,10 +55,3 @@ def writedata(zk_conn, key, data):
zk_transaction.commit()
return 0
# Key create function
def createkey(zk_conn, key, data):
zk_transaction = zk_conn.transaction()
for line in data:
zk_transaction.create(key, line.encode('ascii'))
zk_transaction.commit()