openvswitch bridges are not created

[Vance Morris]

Even though the proxy charm unit is in an active idle, and ready state, the openvswitch bridges are not created.

On the KVM host:
[root@zs93k24 nova]# ovs-vsctl show
1f0b19e7-b780-4166-9b07-edb6078595f4
    ovs_version: "2.5.0"

I observed the following messages in the juju debug-log:

unit-nova-compute-proxy-11: 12:09:45 INFO unit.nova-compute-proxy/11.config-changed [10.20.95.79] Executing task 'add_bridge'
unit-nova-compute-proxy-11: 12:09:45 INFO unit.nova-compute-proxy/11.config-changed [10.20.95.79] sudo: ovs-vsctl -- --may-exist add-br br-int
unit-nova-compute-proxy-11: 12:09:45 INFO unit.nova-compute-proxy/11.config-changed [10.20.95.79] out: ovs-vsctl: unix:/var/run/openvswitch/db.sock: database connection failed (No such file or directory)
unit-nova-compute-proxy-11: 12:09:45 INFO unit.nova-compute-proxy/11.config-changed [10.20.95.79] out:
unit-nova-compute-proxy-11: 12:09:45 INFO unit.nova-compute-proxy/11.config-changed
unit-nova-compute-proxy-11: 12:09:45 INFO unit.nova-compute-proxy/11.config-changed Warning: sudo() received nonzero return code 1 while executing 'ovs-vsctl -- --may-exist add-br br-int'!
unit-nova-compute-proxy-11: 12:09:45 INFO unit.nova-compute-proxy/11.config-changed
unit-nova-compute-proxy-11: 12:09:45 INFO unit.nova-compute-proxy/11.config-changed
unit-nova-compute-proxy-11: 12:09:45 INFO unit.nova-compute-proxy/11.config-changed [10.20.95.79] Executing task 'add_bridge'
unit-nova-compute-proxy-11: 12:09:45 INFO unit.nova-compute-proxy/11.config-changed [10.20.95.79] sudo: ovs-vsctl -- --may-exist add-br br-data
unit-nova-compute-proxy-11: 12:09:45 INFO unit.nova-compute-proxy/11.config-changed [10.20.95.79] out: ovs-vsctl: unix:/var/run/openvswitch/db.sock: database connection failed (No such file or directory)
unit-nova-compute-proxy-11: 12:09:45 INFO unit.nova-compute-proxy/11.config-changed [10.20.95.79] out:
unit-nova-compute-proxy-11: 12:09:45 INFO unit.nova-compute-proxy/11.config-changed
unit-nova-compute-proxy-11: 12:09:45 INFO unit.nova-compute-proxy/11.config-changed Warning: sudo() received nonzero return code 1 while executing 'ovs-vsctl -- --may-exist add-br br-data'!

And the following observed in the journalctl output:

Nov 04 12:09:45 zs93k24 sshd[63344]: pam_unix(sshd:session): session opened for user root by (uid=0)
Nov 04 12:09:45 zs93k24 sudo[63348]: root : TTY=pts/0 ; PWD=/root ; USER=root ; COMMAND=/bin/bash -l -c ovs-vsctl -- --may-exist add-br br-int
Nov 04 12:09:45 zs93k24 ovs-vsctl[63360]: ovs|00001|vsctl|INFO|Called as ovs-vsctl -- --may-exist add-br br-int
Nov 04 12:09:45 zs93k24 ovs-vsctl[63360]: ovs|00002|db_ctl_base|ERR|unix:/var/run/openvswitch/db.sock: database connection failed (No such file or directory)
Nov 04 12:09:45 zs93k24 sudo[63374]: root : TTY=pts/0 ; PWD=/root ; USER=root ; COMMAND=/bin/bash -l -c ovs-vsctl -- --may-exist add-br br-data
Nov 04 12:09:45 zs93k24 ovs-vsctl[63386]: ovs|00001|vsctl|INFO|Called as ovs-vsctl -- --may-exist add-br br-data
Nov 04 12:09:45 zs93k24 ovs-vsctl[63386]: ovs|00002|db_ctl_base|ERR|unix:/var/run/openvswitch/db.sock: database connection failed (No such file or directory)

[Vance Morris (vmorris)]

Manually adding these bridges once the unit is ready works:

[root@zs93k24 nova]# ovs-vsctl show
1f0b19e7-b780-4166-9b07-edb6078595f4
    ovs_version: "2.5.0"
[root@zs93k24 nova]# ovs-vsctl -- --may-exist add-br br-int
[root@zs93k24 nova]# ovs-vsctl -- --may-exist add-br br-data
[root@zs93k24 nova]# ovs-vsctl show
1f0b19e7-b780-4166-9b07-edb6078595f4
    Bridge br-int
        Port br-int
            Interface br-int
                type: internal
    Bridge br-data
        Port br-data
            Interface br-data
                type: internal
    ovs_version: "2.5.0"

[Vance Morris (vmorris)]

This issue is not showing up with the charm code in https://review.openstack.org/#/c/394922/