Missing binary package for octavia prometheus-proxy

[Frode Nordahl]

Yoga introduced a new daemon for use in the Octavia HAProxy Amphorae instances [0].

The Ubuntu Jammy package does not appear to have a binary package for this new daemon.

0: https://github.com/openstack/octavia/commit/0d9674bd87fd1e3d45c529a90cc5e35c23a38250

[Pedro Victor Lourenço Fragola (pedrovlf)]

I tested the diskimage-create[0] and was possible to have the prometheus-proxy using Jammy... so I guess this is configured during the building of the image in this case I filed an LP#2027585[1]

ubuntu@amphora-ca520687-d2b9-4d96-beda-9d787ac2fb78:~$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 22.04.3 LTS
Release: 22.04
Codename: jammy

root 615 1 0 13:10 ? 00:00:00 /opt/amphora-agent-venv/bin/python3 /usr/local/bin/prometheus-proxy

 sudo systemctl status prometheus-proxy.service
sudo: unable to resolve host amphora-ca520687-d2b9-4d96-beda-9d787ac2fb78: Name or service not known
● prometheus-proxy.service - OpenStack Octavia Prometheus Proxy
     Loaded: loaded (/lib/systemd/system/prometheus-proxy.service; enabled; vendor preset: enabled)
     Active: active (running) since Tue 2023-08-15 15:13:10 UTC; 28min ago
   Main PID: 614 (prometheus-prox)
      Tasks: 2 (limit: 1112)
     Memory: 13.6M
        CPU: 860ms
     CGroup: /system.slice/prometheus-proxy.service
             └─614 /opt/amphora-agent-venv/bin/python3 /usr/local/bin/prometheus-proxy

[0] https://github.com/openstack/octavia/blob/master/diskimage-create/diskimage-create.sh
[1] https://bugs.launchpad.net/snap-octavia-diskimage-retrofit/+bug/2027585

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Felipe Alencastro (falencastro)]

I believe this is not a RFE/Wishlist, but rather a deb packaging issue, the package python3-octavia already ships the prometheus-proxy binary, but fails to include it's systemd unit[1].

By just creating the unit everything works as expected.

-----------------------------------------------------------------------------------------------------------

root@amphora-90334dfd-e3fa-4977-bf74-a6a9ab69ea01:~# lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 20.04.6 LTS
Release: 20.04
Codename: focal

root@amphora-90334dfd-e3fa-4977-bf74-a6a9ab69ea01:~# dpkg -S /usr/bin/prometheus-proxy
python3-octavia: /usr/bin/prometheus-proxy

root@amphora-90334dfd-e3fa-4977-bf74-a6a9ab69ea01:~# dpkg -S /usr/lib/systemd/system/prometheus-proxy.service
dpkg-query: no path found matching pattern /usr/lib/systemd/system/prometheus-proxy.service

root@amphora-90334dfd-e3fa-4977-bf74-a6a9ab69ea01:~# ls -l /usr/lib/systemd/system/prometheus-proxy.service
ls: cannot access '/usr/lib/systemd/system/prometheus-proxy.service': No such file or directory

root@amphora-90334dfd-e3fa-4977-bf74-a6a9ab69ea01:~# cat > /usr/lib/systemd/system/prometheus-proxy.service <<EOF
[Unit]
Description=OpenStack Octavia Prometheus Proxy
After=network.target syslog.service amphora-agent.service
Wants=amphora-agent.service

[Service]
ExecStart=/usr/bin/prometheus-proxy
KillMode=mixed
Restart=always
ExecStartPost=/bin/sh -c "echo \$MAINPID > /var/run/prometheus-proxy.pid"
PIDFile=/var/run/prometheus-proxy.pid

[Install]
WantedBy=multi-user.target
EOF

root@amphora-90334dfd-e3fa-4977-bf74-a6a9ab69ea01:~# systemctl daemon-reload
root@amphora-90334dfd-e3fa-4977-bf74-a6a9ab69ea01:~# systemctl start prometheus-proxy
root@amphora-90334dfd-e3fa-4977-bf74-a6a9ab69ea01:~# systemctl status prometheus-proxy
● prometheus-proxy.service - OpenStack Octavia Prometheus Proxy
     Loaded: loaded (/lib/systemd/system/prometheus-proxy.service; enabled; vendor preset: enabled)
     Active: active (running) since Wed 2024-07-03 15:48:42 UTC; 3s ago
    Process: 57115 ExecStartPost=/bin/sh -c echo $MAINPID > /var/run/prometheus-proxy.pid (code=exited, status=0/SUCCESS)
   Main PID: 57114 (prometheus-prox)
      Tasks: 2 (limit: 2324)
     Memory: 14.8M
     CGroup: /system.slice/prometheus-proxy.service
             └─57114 /usr/bin/python3 /usr/bin/prometheus-proxy

Jul 03 15:48:42 amphora-90334dfd-e3fa-4977-bf74-a6a9ab69ea01 systemd[1]: Starting OpenStack Octavia Prometheus Proxy...
Jul 03 15:48:42 amphora-90334dfd-e3fa-4977-bf74-a6a9ab69ea01 systemd[1]: Started OpenStack Octavia Prometheus Proxy.

root@amphora-90334dfd-e3fa-4977-bf74-a6a9ab69ea01:~# ip netns exec amphora-haproxy bash

root@amphora-90334dfd-e3fa-4977-bf74-a6a9ab69ea01:~# curl -s http://127.0.0.1:9102|tail -n 5
# HELP octavia_member_idle_connections_limit Limit on the number of available idle connections
# TYPE octavia_member_idle_connections_limit gauge
octavia_member_idle_connections_limit{pool="de7983a9-f1fd-40e1-afe0-fd7830d462d7:734b3ed3-738d-4a79-8189-5e025d19491d",member="3a4e01ff-8e99-490c-9f12-bc7e9eaa4b65"} 0
octavia_member_idle_connections_limit{pool="de7983a9-f1fd-40e1-afe0-fd7830d462d7:734b3ed3-7...

[Andre Ruiz (andre-ruiz)]

I have taken a look at this with the customer and indeed it seems a matter of adding a file to the deb package (file which is already in the sources, just being missed while packaging). Half of the functionality is there (the proxy itself) but the systemd-unit that starts the proxy is missing. Adding that file manually to the file-system fixes the issue.