ovs .pid file?

[bjolo]

when executing ovs commands in the containers, they complain they cant find the pid file. File does not exist

[root@eselda04u25 openvswitch]# docker exec openvswitch_db ovs-appctl list-commands
2020-02-21T22:49:01Z|00001|daemon_unix|WARN|/var/run/openvswitch/ovs-vswitchd.pid: open: No such file or directory
ovs-appctl: cannot read pidfile "/var/run/openvswitch/ovs-vswitchd.pid" (No such file or directory)
[root@eselda04u25 openvswitch]# docker exec openvswitch_vswitchd ovs-appctl list-commands
2020-02-21T22:49:10Z|00001|daemon_unix|WARN|/var/run/openvswitch/ovs-vswitchd.pid: open: No such file or directory
ovs-appctl: cannot read pidfile "/var/run/openvswitch/ovs-vswitchd.pid" (No such file or directory)
[root@eselda04u25 openvswitch]# ll /var/run/openvswitch/
total 0
srwxr-x---. 1 root root 0 Feb 17 20:12 br-ex.mgmt
srwxr-x---. 1 root root 0 Feb 17 20:12 br-ex.snoop
srwxr-x---. 1 root root 0 Feb 17 20:12 br-int.mgmt
srwxr-x---. 1 root root 0 Feb 17 20:12 br-int.snoop
srwxr-x---. 1 root root 0 Feb 17 20:12 br-tun.mgmt
srwxr-x---. 1 root root 0 Feb 17 20:12 br-tun.snoop
srwxr-x---. 1 root root 0 Feb 17 20:12 br-vlan4022.mgmt
srwxr-x---. 1 root root 0 Feb 17 20:12 br-vlan4022.snoop
srwxr-x---. 1 root root 0 Feb 17 20:12 br-vlan4023.mgmt
srwxr-x---. 1 root root 0 Feb 17 20:12 br-vlan4023.snoop
srwxr-x---. 1 root root 0 Feb 17 20:12 br-vlan4024.mgmt
srwxr-x---. 1 root root 0 Feb 17 20:12 br-vlan4024.snoop
srwxr-x---. 1 root root 0 Feb 17 20:12 br-vlan4025.mgmt
srwxr-x---. 1 root root 0 Feb 17 20:12 br-vlan4025.snoop
srwxr-x---. 1 root root 0 Feb 17 20:12 db.sock
srwxr-x---. 1 root root 0 Feb 17 20:06 ovsdb-server.14.ctl
srwxr-x---. 1 root root 0 Feb 17 20:12 ovsdb-server.15.ctl
srwxr-x---. 1 root root 0 Feb 17 20:12 ovs-vswitchd.14.ctl

Expection:
commands should work and return output

Env:
version: rocky centos7 source built december
kernel 5.4.15
Host OS: centos 7
docker 17.05

[bjolo (bjorn-lofdahl)]

The solution is to add the --pidfile flag to the start-ovs
See man ovs-vswitchd

# cat /etc/kolla/openvswitch-vswitchd/start-ovs
#!/usr/bin/env bash
/usr/sbin/ovs-vswitchd unix:/run/openvswitch/db.sock --pidfile -vconsole:emer -vsyslog:err -vfile:info --mlockall --log-file=/var/log/kolla/openvswitch/ovs-vswitchd.log