compute node: neutron-ovn-metadata-agent: ovn-sb SSL certificates are not configured

[Max Khon]

SSL certificates are not configured for neutron-ovn-metadata-agent (ovn-sb).
As a result ovn-sb can not connect to ovn-ovsdb-server:

On control node:

# journalctl -u snap.microstack.ovn-ovsdb-server-sb -l --no-page

5 31 07:03:22 eq-os1 ovsdb-server[35642]: ovs|00299|stream_ssl|WARN|SSL_accept: system error (Success)
5 31 07:03:22 eq-os1 ovsdb-server[35642]: ovs|00300|jsonrpc|WARN|Dropped 2 log messages in last 64 seconds (most recently, 64 seconds ago) due to excessive rate
5 31 07:03:22 eq-os1 ovsdb-server[35642]: ovs|00301|jsonrpc|WARN|ssl:10.30.0.13:58894: receive error: Protocol error
5 31 07:03:22 eq-os1 ovsdb-server[35642]: ovs|00302|reconnect|WARN|ssl:10.30.0.13:58894: connection dropped (Protocol error)
5 31 07:03:22 eq-os1 ovsdb-server[35642]: ovs|00303|stream_ssl|WARN|SSL_accept: system error (Success)
5 31 07:03:22 eq-os1 ovsdb-server[35642]: ovs|00304|jsonrpc|WARN|ssl:10.30.0.13:58896: receive error: Protocol error
5 31 07:03:22 eq-os1 ovsdb-server[35642]: ovs|00305|reconnect|WARN|ssl:10.30.0.13:58896: connection dropped (Protocol error)
5 31 07:03:22 eq-os1 ovsdb-server[35642]: ovs|00306|stream_ssl|WARN|SSL_accept: system error (Success)
5 31 07:03:22 eq-os1 ovsdb-server[35642]: ovs|00307|jsonrpc|WARN|ssl:10.30.0.13:58898: receive error: Protocol error

Workaround:

On compute node: append the following configuration keys to [ovn] section of /var/snap/microstack/common/etc/neutron/neutron_ovn_metadata_agent.ini:

---
ovn_sb_private_key = /var/snap/microstack/common/etc/ssl/private/compute-key.pem
ovn_sb_certificate = /var/snap/microstack/common/etc/ssl/certs/compute-cert.pem
ovn_sb_ca_cert = /var/snap/microstack/common/etc/ssl/certs/cacert.pem
---

And restart snap.microstack.neutron-ovn-metadata-agent service:

# systemctl restart snap.microstack.neutron-ovn-metadata-agent