Connection to proxy on a different host fails at Hearbeat

[kridgo]

I cannot connect to the docker-socket-proxy when it is running on another host. I am using this docker-compose setup to run the proxy on the remote host:

version: "3"
services:
  nextcloud-appapi-dsp:
    environment:
      - NC_HAPROXY_PASSWORD=some_secure_password
      - BIND_ADDRESS=192.168.178.5
      - EX_APPS_NET=ipv4@192.168.178.5
    volumes:
      - /var/run/docker.sock:/var/run/docker.sock
    container_name: nextcloud-appapi-dsp
    hostname: nextcloud-appapi-dsp
    restart: unless-stopped
    privileged: true
    image: ghcr.io/cloud-py-api/nextcloud-appapi-dsp:release
    network_mode: host

It does start as expected when running sudo docker-compose up and I can register it as a deploy daemon in my Nextcloud server. However, when I run the Test deploy for the daemon it fails at stage Heartbeat. It does install the test deploy container on the remote host and is able to start it:

CONTAINER ID   IMAGE                                               COMMAND                CREATED          STATUS                    PORTS     NAMES
299ce125b19f   ghcr.io/cloud-py-api/test-deploy-cpu:release        "python3 main.py"      10 minutes ago   Up 10 minutes (healthy)             nc_app_test-deploy
1464ca39de38   ghcr.io/cloud-py-api/nextcloud-appapi-dsp:release   "/bin/bash start.sh"   6 days ago       Up 11 minutes (healthy)             nextcloud-appapi-dsp

Still, Nextcloud server cannot connect to it. If I check the open ports on the remote host running the proxy with sudo netstat -tulpn | grep LISTEN, I get this:

tcp        0      0 127.0.0.1:631           0.0.0.0:*               LISTEN      1779/cupsd
tcp        0      0 127.0.0.1:46689         0.0.0.0:*               LISTEN      697/containerd
tcp        0      0 0.0.0.0:22              0.0.0.0:*               LISTEN      716/sshd: /usr/sbin
tcp        0      0 127.0.0.1:23000         0.0.0.0:*               LISTEN      3165/python3
tcp        0      0 192.168.178.5:2375      0.0.0.0:*               LISTEN      2452/haproxy
tcp6       0      0 :::22                   :::*                    LISTEN      716/sshd: /usr/sbin
tcp6       0      0 ::1:631                 :::*                    LISTEN      1779/cupsd

I guess the open port in the fourth line should be 192.168.178.23000 for the Heartbeat to work properly?

The Nextcloud server and the remote host are on the same network 192.168.178.0/24 and there is no firewall that could prevent any traffic. The remote host is a Raspberry Pi3 running Raspbian (it is setup for testing purpose only, I realize it is not a suitable platform to run the ExApps in a productive manner). It also does not help if I change the env variable for the sub containers according to the readme: - EX_APPS_NET="ipv4@127.0.0.1"

If the failing Heartbeat is not an issue of the docker-socket-proxy but my setup is messed up, any hint will be highly appreciated.

[bigcat88]

Sorry for the delay.

EX_APPS_NET should be "ipv4@127.0.0.1" for the remote installs.

HaProxy should listen on 2375 AND ON "BIND_ADDRESS":23000 port in case of remote installations.

Can I see output of cat haproxy_ex_apps.cfg ?

There should be some such line:

frontend ex_apps
    mode http
    bind 192.168.178.5:23000-23030 v4v6 ssl crt /certs/cert.pem

[alonsobasauri]

Hello, I have this:

nextcloud-appapi-dsp:/# cat haproxy_ex_apps.cfg
frontend ex_apps
mode http
BIND_ADDRESS_PLACEHOLDER

My docker command:

sudo docker run -e NC_HAPROXY_PASSWORD="some_secure_password" -e BIND_ADDRESS=192.168.1.97 -e EX_APPS_NET=ipv4@127.0.0.1 -v /var/run/docker.sock:/var/run/docker.sock -v pwd/certs/cert.pem:/certs/cert.pem --name nextcloud-appapi-dsp -h nextcloud-appapi-dsp --net host --restart unless-stopped --privileged -d ghcr.io/cloud-py-api/nextcloud-appapi-dsp:release

Hope you can help us, I'm like 50 hours into this :/

[andrey18106]

Hello, I have this:

nextcloud-appapi-dsp:/# cat haproxy_ex_apps.cfg frontend ex_apps mode http BIND_ADDRESS_PLACEHOLDER

My docker command:

sudo docker run -e NC_HAPROXY_PASSWORD="some_secure_password" -e BIND_ADDRESS=192.168.1.97 -e EX_APPS_NET=ipv4@127.0.0.1 -v /var/run/docker.sock:/var/run/docker.sock -v pwd/certs/cert.pem:/certs/cert.pem --name nextcloud-appapi-dsp -h nextcloud-appapi-dsp --net host --restart unless-stopped --privileged -d ghcr.io/cloud-py-api/nextcloud-appapi-dsp:release

Hope you can help us, I'm like 50 hours into this :/

Hello, this might be related and useful for you: nextcloud/app_api#413, https://nextcloud.github.io/app_api/CreationOfDeployDaemon.html#additional-options