The script varnish-frontend-restart currently fails as follows in Beta:
root@deployment-cache-text06:~# varnish-frontend-restart ERROR:etcd.client:Could not discover the etcd hosts from conftool.deployment-prep.eqiad.wmflabs: None of DNS query names exist: _etcd._tcp.conftool.deployment-prep.eqiad.wmflabs., _etcd._tcp.conftool.deployment-prep.eqiad.wmflabs.deployment-prep.eqiad.wmflabs., _etcd._tcp.conftool.deployment-prep.eqiad.wmflabs.deployment-prep.eqiad1.wikimedia.cloud., _etcd._tcp.conftool.deployment-prep.eqiad.wmflabs.eqiad.wmflabs. /usr/lib/python3/dist-packages/urllib3/connection.py:362: SubjectAltNameWarning: Certificate for deployment-etcd02.deployment-prep.eqiad1.wikimedia.cloud has no `subjectAltName`, falling back to check for a `commonName` for now. This feature is being removed by major browsers and deprecated by RFC 2818. (See https://github.com/shazow/urllib3/issues/497 for details.) SubjectAltNameWarning Traceback (most recent call last): File "/usr/lib/python3/dist-packages/conftool/drivers/etcd.py", line 114, in _ls res = self.client.read(key, recursive=recursive) File "/usr/lib/python3/dist-packages/etcd/client.py", line 597, in read timeout=timeout) File "/usr/lib/python3/dist-packages/etcd/client.py", line 907, in wrapper return self._handle_server_response(response) File "/usr/lib/python3/dist-packages/etcd/client.py", line 987, in _handle_server_response etcd.EtcdError.handle(r) File "/usr/lib/python3/dist-packages/etcd/__init__.py", line 306, in handle raise exc(msg, payload) etcd.EtcdKeyNotFound: Key not found : /conftool/v1/pools
Although actually depooling the service makes little sense in Beta (the node is not behind LVS), it would be good if the script could Just Work and effectively fall back to systemctl restart varnish-frontend to ensure uniformity of procedure when upgrading Varnish in Beta and in Prod.