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Socket-proxy Socket-proxy

Docker

This container needs special attention. Please check https://hub.docker.com/r/linuxserver/socket-proxy for details.

Image details

Pulls: 1.1M
Architectures: amd64, arm64, riscv64
Image size: 7 MB
Latest: 3.4.2
User: linuxserverci
Created: Apr 08, 2024
Updated: 15 days ago
Status: active

Configuration

Type
Container
Platform
linux
Image
linuxserver/socket-proxy:latest
Ports
80:80/tcp
Volumes
/config : /srv/lsio/socket-proxy/config
Env vars
PUID=1000PGID=1000TZ=Etc/UTC
Restart
unless-stopped

Template by technorabilia

Notes

Portainer App Templates by Technorabilia, based on data provided by LinuxServer.io.

Ensure to create the following volume directories on the host file system, or modify the paths in the volume mapping section under the advanced options below, as needed.

mkdir -p /srv/lsio/socket-proxy/config

Installation

  1. Ensure both Docker and Portainer are installed, and up-to-date
  2. Log into your Portainer web UI
  3. Under Settings → App Templates, paste the below URL
  4. Head to Home → App Templates, and the list of apps will show up
  5. Select the app you wish to deploy, fill in any config options, and hit Deploy

Template Import URL

https://raw.githubusercontent.com/Lissy93/portainer-templates/main/templates.json
Show Me demo

docker run -d --name Socket-proxy \
  -p 80:80/tcp \
  -e 'PUID=1000' \
  -e 'PGID=1000' \
  -e 'TZ=Etc/UTC' \
  -v /srv/lsio/socket-proxy/config:/config \
  --restart=unless-stopped \
  linuxserver/socket-proxy:latest

Save this file as compose.yaml and run docker compose up -d
Use this only as a guide.

services:
  socket-proxy:
    image: linuxserver/socket-proxy:latest
    ports:
      - 80:80/tcp
    volumes:
      - /srv/lsio/socket-proxy/config:/config
    environment:
      PUID: '1000'
      PGID: '1000'
      TZ: Etc/UTC
    restart: unless-stopped

Save this file as socket-proxy-stack.yml, then from a manager node, run docker stack deploy -c socket-proxy-stack.yml socket-proxy

version: '3.8'
services:
  socket-proxy:
    image: linuxserver/socket-proxy:latest
    ports:
      - 80:80/tcp
    volumes:
      - /srv/lsio/socket-proxy/config:/config
    environment:
      PUID: '1000'
      PGID: '1000'
      TZ: Etc/UTC
    deploy:
      restart_policy:
        condition: any

Save each file below into a folder, then run kubectl apply -f .
Written for k3s, but works on any cluster: bind mounts use hostPath, named volumes get a persistent volume claim, and ports are exposed via a LoadBalancer service.

socket-proxy-deployment.yaml

apiVersion: apps/v1
kind: Deployment
metadata:
  name: socket-proxy
  labels:
    app: socket-proxy
spec:
  replicas: 1
  selector:
    matchLabels:
      app: socket-proxy
  template:
    metadata:
      labels:
        app: socket-proxy
    spec:
      containers:
        - name: socket-proxy
          image: linuxserver/socket-proxy:latest
          env:
            - name: PUID
              value: '1000'
            - name: PGID
              value: '1000'
            - name: TZ
              value: Etc/UTC
          ports:
            - containerPort: 80
              protocol: TCP
          volumeMounts:
            - name: socket-proxy-data-0
              mountPath: /config
      volumes:
        - name: socket-proxy-data-0
          hostPath:
            path: /srv/lsio/socket-proxy/config

socket-proxy-service.yaml

apiVersion: v1
kind: Service
metadata:
  name: socket-proxy
spec:
  type: LoadBalancer
  selector:
    app: socket-proxy
  ports:
    - name: 80-tcp
      port: 80
      targetPort: 80
      protocol: TCP

Save this file as ~/.config/containers/systemd/socket-proxy.container

[Unit]
Description=Socket-proxy

[Container]
Image=linuxserver/socket-proxy:latest
ContainerName=socket-proxy
PublishPort=80:80/tcp
Environment=PUID=1000
Environment=PGID=1000
Environment=TZ=Etc/UTC
Volume=/srv/lsio/socket-proxy/config:/config

[Service]
Restart=always

[Install]
WantedBy=default.target

Then reload systemd and start the service:

systemctl --user daemon-reload
systemctl --user start socket-proxy

For a system-wide service, use /etc/containers/systemd/ and drop --user.

For more installation options, see the Documentation in our GitHub repo

linuxserver.io
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linuxserver/socket-proxy

Scarf.io pulls GitHub Stars GitHub Release GitHub Package Repository GitLab Container Registry Quay.io Docker Pulls Docker Stars Jenkins Build
The Socket Proxy is a security-enhanced proxy which allows you to apply access rules to the Docker socket, limiting the attack surface for containers such as watchtower or Traefik that need to use it.
socket-proxy

Supported Architectures

We utilise the docker manifest for multi-platform awareness. More information is available from docker here and our announcement here.
Simply pulling lscr.io/linuxserver/socket-proxy:latest should retrieve the correct image for your arch, but you can also pull specific arch images via tags.
The architectures supported by this image are:
| Architecture | Available | Tag | | :----: | :----: | ---- | | x86-64 | ✅ | amd64-\ | | riscv64 | ✅ | riscv64-\ | | arm64 | ✅ | arm64v8-\ | | armhf | ❌ | |

Application Setup

This container is conceptually based on https://github.com/Tecnativa/docker-socket-proxy and as such does not follow our usual container conventions. It does not support mods or custom scripts/services, or running as a user other than root (or the docker user in a rootless environment). It is designed to act as a drop-in replacement for the Tecnativa container.
The container should be run on the same docker network as the service(s) using it. Most containers that would normally connect to a mounted docker.sock can have their endpoint overridden using the DOCKER_HOST environment variable if they do not offer the option in their configuration; it should typically be pointed to tcp://socket-proxy:2375.
  • Never expose this container's port to a public network. It should be treated the same way you would treat the docker socket or TCP endpoint.
  • Revoke access to any API section that you consider your service should not need.
  • To see the versions of the API your Docker daemon and client support, use docker version and check the API version.
  • Read the docs for the API version you are using for an explanation of all the available endpoints.

Podman / libpod API

Podman exposes two API groups on the same socket: the Docker-compatible API (controlled by the existing env vars above) and the libpod-native API prefixed with /libpod/. The LIBPOD_* environment variables control access to the libpod endpoints independently of their Docker-compat equivalents.
For example, to use prometheus-podman-exporter, enable:
- LIBPOD_CONTAINERS=1
- LIBPOD_INFO=1
- LIBPOD_NETWORKS=1
- LIBPOD_PODS=1
- LIBPOD_VOLUMES=1
- LIBPOD_IMAGES=1
- LIBPOD_EVENTS=1

Point the exporter at tcp://socket-proxy:2375 using CONTAINER_HOST. LIBPOD_PING and LIBPOD_VERSION are enabled by default (like their Docker-compat counterparts PING and VERSION).

Read-Only Operation

This image can be run with a read-only container filesystem. For details please read the docs.

Usage

To help you get started creating a container from this image you can either use docker compose or the docker cli.
>!NOTE >Unless a parameter is flaged as 'optional', it is mandatory and a value must be provided.

docker compose (recommended, click here for more info)

---
services:
  socket-proxy:
    image: lscr.io/linuxserver/socket-proxy:latest
    container_name: socket-proxy
    environment:
      - ALLOW_START=0 #optional
      - ALLOW_STOP=0 #optional
      - ALLOW_RESTARTS=0 #optional
      - ALLOW_PAUSE=0 #optional
      - ALLOW_UNPAUSE=0 #optional
      - AUTH=0 #optional
      - BUILD=0 #optional
      - COMMIT=0 #optional
      - CONFIGS=0 #optional
      - CONTAINERS=0 #optional
      - DISABLE_IPV6=0 #optional
      - DISTRIBUTION=0 #optional
      - EVENTS=1 #optional
      - EXEC=0 #optional
      - IMAGES=0 #optional
      - INFO=0 #optional
      - LOG_LEVEL=info #optional
      - NETWORKS=0 #optional
      - NODES=0 #optional
      - PING=1 #optional
      - PLUGINS=0 #optional
      - POST=0 #optional
      - SECRETS=0 #optional
      - SERVICES=0 #optional
      - SESSION=0 #optional
      - SWARM=0 #optional
      - SYSTEM=0 #optional
      - TASKS=0 #optional
      - TZ=Etc/UTC #optional
      - VERSION=1 #optional
      - VOLUMES=0 #optional
      - LIBPOD_ALLOW_PAUSE=0 #optional
      - LIBPOD_ALLOW_POD_PAUSE=0 #optional
      - LIBPOD_ALLOW_POD_RESTARTS=0 #optional
      - LIBPOD_ALLOW_POD_START=0 #optional
      - LIBPOD_ALLOW_POD_STOP=0 #optional
      - LIBPOD_ALLOW_POD_UNPAUSE=0 #optional
      - LIBPOD_ALLOW_RESTARTS=0 #optional
      - LIBPOD_ALLOW_START=0 #optional
      - LIBPOD_ALLOW_STOP=0 #optional
      - LIBPOD_ALLOW_UNPAUSE=0 #optional
      - LIBPOD_CONTAINERS=0 #optional
      - LIBPOD_EVENTS=0 #optional
      - LIBPOD_EXEC=0 #optional
      - LIBPOD_GENERATE=0 #optional
      - LIBPOD_IMAGES=0 #optional
      - LIBPOD_INFO=0 #optional
      - LIBPOD_MANIFESTS=0 #optional
      - LIBPOD_NETWORKS=0 #optional
      - LIBPOD_PING=1 #optional
      - LIBPOD_PLAY=0 #optional
      - LIBPOD_PODS=0 #optional
      - LIBPOD_SECRETS=0 #optional
      - LIBPOD_SYSTEM=0 #optional
      - LIBPOD_VERSION=1 #optional
      - LIBPOD_VOLUMES=0 #optional
    volumes:
      - /var/run/docker.sock:/var/run/docker.sock:ro
    restart: unless-stopped
    read_only: true
    tmpfs:
      - /run

docker cli (click here for more info)

docker run -d \
  --name=socket-proxy \
  -e ALLOW_START=0 `#optional` \
  -e ALLOW_STOP=0 `#optional` \
  -e ALLOW_RESTARTS=0 `#optional` \
  -e ALLOW_PAUSE=0 `#optional` \
  -e ALLOW_UNPAUSE=0 `#optional` \
  -e AUTH=0 `#optional` \
  -e BUILD=0 `#optional` \
  -e COMMIT=0 `#optional` \
  -e CONFIGS=0 `#optional` \
  -e CONTAINERS=0 `#optional` \
  -e DISTRIBUTION=0 `#optional` \
  -e DISABLE_IPV6=0 `#optional` \
  -e EVENTS=1 `#optional` \
  -e EXEC=0 `#optional` \
  -e IMAGES=0 `#optional` \
  -e INFO=0 `#optional` \
  -e LOG_LEVEL=info `#optional` \
  -e NETWORKS=0 `#optional` \
  -e NODES=0 `#optional` \
  -e PING=1 `#optional` \
  -e PLUGINS=0 `#optional` \
  -e POST=0 `#optional` \
  -e SECRETS=0 `#optional` \
  -e SERVICES=0 `#optional` \
  -e SESSION=0 `#optional` \
  -e SWARM=0 `#optional` \
  -e SYSTEM=0 `#optional` \
  -e TASKS=0 `#optional` \
  -e TZ=Etc/UTC `#optional` \
  -e VERSION=1 `#optional` \
  -e VOLUMES=0 `#optional` \
  -e LIBPOD_ALLOW_PAUSE=0 `#optional` \
  -e LIBPOD_ALLOW_POD_PAUSE=0 `#optional` \
  -e LIBPOD_ALLOW_POD_RESTARTS=0 `#optional` \
  -e LIBPOD_ALLOW_POD_START=0 `#optional` \
  -e LIBPOD_ALLOW_POD_STOP=0 `#optional` \
  -e LIBPOD_ALLOW_POD_UNPAUSE=0 `#optional` \
  -e LIBPOD_ALLOW_RESTARTS=0 `#optional` \
  -e LIBPOD_ALLOW_START=0 `#optional` \
  -e LIBPOD_ALLOW_STOP=0 `#optional` \
  -e LIBPOD_ALLOW_UNPAUSE=0 `#optional` \
  -e LIBPOD_CONTAINERS=0 `#optional` \
  -e LIBPOD_EVENTS=0 `#optional` \
  -e LIBPOD_EXEC=0 `#optional` \
  -e LIBPOD_GENERATE=0 `#optional` \
  -e LIBPOD_IMAGES=0 `#optional` \
  -e LIBPOD_INFO=0 `#optional` \
  -e LIBPOD_MANIFESTS=0 `#optional` \
  -e LIBPOD_NETWORKS=0 `#optional` \
  -e LIBPOD_PING=1 `#optional` \
  -e LIBPOD_PLAY=0 `#optional` \
  -e LIBPOD_PODS=0 `#optional` \
  -e LIBPOD_SECRETS=0 `#optional` \
  -e LIBPOD_SYSTEM=0 `#optional` \
  -e LIBPOD_VERSION=1 `#optional` \
  -e LIBPOD_VOLUMES=0 `#optional` \
  -v /var/run/docker.sock:/var/run/docker.sock:ro \
  --restart unless-stopped \
  --read-only \
  --tmpfs /run \
  lscr.io/linuxserver/socket-proxy:latest

Parameters

Containers are configured using parameters passed at runtime (such as those above). These parameters are separated by a colon and indicate <external>:<internal> respectively. For example, -p 8080:80 would expose port 80 from inside the container to be accessible from the host's IP on port 8080 outside the container.
| Parameter | Function | | :----: | --- | | -e ALLOW_START=0 | /containers/{id}/start - This option will work even if POST=0 | | -e ALLOW_STOP=0 | /containers/{id}/stop - This option will work even if POST=0 | | -e ALLOW_RESTARTS=0 | /containers/{id}/stop, /containers/{id}/restart, and /containers/{id}/kill - This option will work even if POST=0 | | -e ALLOW_PAUSE=0 | /containers/{id}/pause - This option will work even if POST=0 | | -e ALLOW_UNPAUSE=0 | /containers/{id}/unpause - This option will work even if POST=0 | | -e AUTH=0 | /auth | | -e BUILD=0 | /build | | -e COMMIT=0 | /commit | | -e CONFIGS=0 | /configs | | -e CONTAINERS=0 | /containers | | -e DISTRIBUTION=0 | /distribution | | -e DISABLE_IPV6=0 | Set to 1 to prevent binding to the IPv6 interface for legacy systems that cannot support IPv6. | | -e EVENTS=1 | /events | | -e EXEC=0 | /exec & /containers/{id}/exec | | -e IMAGES=0 | /images | | -e INFO=0 | /info | | -e LOG_LEVEL=info | Possible values are: debug, info, notice, warning, err, crit, alert and emerg. Defaults to info. | | -e NETWORKS=0 | /networks | | -e NODES=0 | /nodes | | -e PING=1 | /_ping | | -e PLUGINS=0 | /plugins | | -e POST=0 | When set to 0, only GET and HEAD operations are allowed, making API access read-only. | | -e SECRETS=0 | /secrets | | -e SERVICES=0 | /services | | -e SESSION=0 | /session | | -e SWARM=0 | /swarm | | -e SYSTEM=0 | /system | | -e TASKS=0 | /tasks | | -e TZ=Etc/UTC | Set container timezone | | -e VERSION=1 | /version | | -e VOLUMES=0 | /volumes | | Podman libpod API | | | -e LIBPOD_ALLOW_START=0 | /libpod/containers/{id}/start - This option will work even if POST=0 | | -e LIBPOD_ALLOW_STOP=0 | /libpod/containers/{id}/stop - This option will work even if POST=0 | | -e LIBPOD_ALLOW_RESTARTS=0 | /libpod/containers/{id}/stop, /libpod/containers/{id}/restart, and /libpod/containers/{id}/kill - This option will work even if POST=0 | | -e LIBPOD_ALLOW_PAUSE=0 | /libpod/containers/{id}/pause - This option will work even if POST=0 | | -e LIBPOD_ALLOW_UNPAUSE=0 | /libpod/containers/{id}/unpause - This option will work even if POST=0 | | -e LIBPOD_ALLOW_POD_START=0 | /libpod/pods/{name}/start - This option will work even if POST=0 | | -e LIBPOD_ALLOW_POD_STOP=0 | /libpod/pods/{name}/stop - This option will work even if POST=0 | | -e LIBPOD_ALLOW_POD_RESTARTS=0 | /libpod/pods/{name}/stop, /libpod/pods/{name}/restart, and /libpod/pods/{name}/kill - This option will work even if POST=0 | | -e LIBPOD_ALLOW_POD_PAUSE=0 | /libpod/pods/{name}/pause - This option will work even if POST=0 | | -e LIBPOD_ALLOW_POD_UNPAUSE=0 | /libpod/pods/{name}/unpause - This option will work even if POST=0 | | -e LIBPOD_CONTAINERS=0 | /libpod/containers | | -e LIBPOD_EVENTS=0 | /libpod/events | | -e LIBPOD_EXEC=0 | /libpod/exec | | -e LIBPOD_GENERATE=0 | /libpod/generate (systemd/kube YAML generation) | | -e LIBPOD_IMAGES=0 | /libpod/images | | -e LIBPOD_INFO=0 | /libpod/info | | -e LIBPOD_MANIFESTS=0 | /libpod/manifests | | -e LIBPOD_NETWORKS=0 | /libpod/networks | | -e LIBPOD_PING=1 | /libpod/_ping | | -e LIBPOD_PLAY=0 | /libpod/play (kube play) | | -e LIBPOD_PODS=0 | /libpod/pods (Podman-specific pod management) | | -e LIBPOD_SECRETS=0 | /libpod/secrets | | -e LIBPOD_SYSTEM=0 | /libpod/system | | -e LIBPOD_VERSION=1 | /libpod/version | | -e LIBPOD_VOLUMES=0 | /libpod/volumes | | -v /var/run/docker.sock:ro | Mount the host docker socket into the container. | | --read-only | Make the container filesystem read-only. | | --tmpfs /run | Mount /run to tmpfs (RAM) to make it writeable. |

Support Info

  • Shell access whilst the container is running:

docker exec -it socket-proxy /bin/sh

  • To monitor the logs of the container in realtime:

docker logs -f socket-proxy

  • Container version number:

docker inspect -f '{{ index .Config.Labels "build_version" }}' socket-proxy

  • Image version number:

docker inspect -f '{{ index .Config.Labels "build_version" }}' lscr.io/linuxserver/socket-proxy:latest

Updating Info

Most of our images are static, versioned, and require an image update and container recreation to update the app inside. With some exceptions (noted in the relevant readme.md), we do not recommend or support updating apps inside the container. Please consult the Application Setup section above to see if it is recommended for the image.
Below are the instructions for updating containers:

Via Docker Compose

  • Update images:
All images:
```bash docker compose pull ```
Single image:
```bash docker compose pull socket-proxy ```
  • Update containers:
All containers:
```bash docker compose up -d ```
Single container:
```bash docker compose up -d socket-proxy ```
  • You can also remove the old dangling images:

docker image prune

Via Docker Run

  • Update the image:

docker pull lscr.io/linuxserver/socket-proxy:latest

  • Stop the running container:

docker stop socket-proxy

  • Delete the container:

docker rm socket-proxy

  • You can also remove the old dangling images:

docker image prune

Image Update Notifications - Diun (Docker Image Update Notifier)

>!TIP >We recommend Diun for update notifications. Other tools that automatically update containers unattended are not recommended or supported.

Building locally

If you want to make local modifications to these images for development purposes or just to customize the logic:
git clone https://github.com/linuxserver/docker-socket-proxy.git
cd docker-socket-proxy
docker build \
  --no-cache \
  --pull \
  -t lscr.io/linuxserver/socket-proxy:latest .

The ARM variants can be built on x8664 hardware and vice versa using lscr.io/linuxserver/docker-qemu-static
docker run --rm --privileged lscr.io/linuxserver/docker-qemu-static --reset

Once registered you can define the dockerfile to use with -f Dockerfile.aarch64.

Versions

  • 15.06.26: - Rebase to Alpine 3.24.
  • 13.06.26: - Add libpod API support for Podman via LIBPOD_* environment variables.
  • 24.02.26: - Add ALLOW_PAUSE and ALLOW_UNPAUSE.
  • 26.12.25: - Rebase to Alpine 3.23.
  • 19.08.25: - Add tzdata for localised logging timestamps.
  • 03.06.25: - Rebase to Alpine 3.22. Add RISCV support.
  • 08.04.25: - Add LOG_LEVEL back.
  • 06.04.25: - Switch back to haproxy for better handling of docker exec connection hijacking.
  • 02.01.25: - Support custom read timeout values.
  • 05.12.24: - Rebase to Alpine 3.21.
  • 26.08.24: - Change ALLOW_START, ALLOW_STOP, and ALLOW_RESTARTS to work even with POST=0.
  • 24.05.24: - Rebase to Alpine 3.20.
  • 15.04.24: - Allow disabling IPv6 support for legacy devices.
  • 08.04.24: - Use nginx due to haproxy's wonky websockets handling.
  • 07.04.24: - Initial Release.

Serve Socket-proxy on your own domain behind Caddy, Nginx or Traefik. Fill in your domain and copy the result. It's a starting point, some apps need their own base URL or extra headers set too.

Proxying socket-proxy.example.com to http://Socket-proxy:80

Add this to your Caddyfile

socket-proxy.example.com {
	reverse_proxy http://Socket-proxy:80
}

Check the logs first

Nine times out of ten the logs tell you exactly what went wrong.

  • In Portainer, go to Containers, click the container, then Logs. Or run docker logs Socket-proxy
  • Exit codes help too: 137 means killed, usually out of memory. 126 or 127 means the command inside the image is broken.

Port already in use

If deployment fails with "Bind for 0.0.0.0:80 failed: port is already allocated", something else on your server is using that port.

  • Find what's using it: sudo ss -tlnp | grep :80
  • Stop the other service, or pick a different host port. In 80:80 only the left number is yours to change, the right one belongs to the app.

Running but the page won't load

The container is up but nothing appears in your browser.

  • Use your server's real IP: http://your-server-ip:80. The 0.0.0.0 link Portainer shows isn't a real address.
  • Give it a minute after first deploy, Socket-proxy can take a while to initialise.
  • Make sure your firewall allows the port, e.g. sudo ufw allow 80

Permission denied on volumes

If the logs show "permission denied", the app can't write to its data folder on the host.

  • Fix the ownership: sudo chown -R 1000:1000 /srv/lsio/socket-proxy/config
  • Or set the PUID and PGID variables (defaults 1000:1000) to match your own user, found with id $USER

Image won't pull

Test the pull directly on the host: docker pull linuxserver/socket-proxy:latest

  • "manifest unknown" means the tag no longer exists. This template uses latest, so try pinning a specific version instead.
  • "toomanyrequests" is the Docker Hub rate limit. Log in with docker login to raise it.
  • "no space left on device" means a full disk. Reclaim space with docker system prune

"exec format error"

This means the image was built for a different CPU architecture than your server.

  • This image supports: amd64, arm64, riscv64
  • Check yours with uname -m: x86_64 is amd64, aarch64 is arm64. Raspberry Pi and other ARM boards are the usual culprits.

Container keeps restarting

The unless-stopped restart policy relaunches the app after every crash, so the real error can scroll past.

  • Check the logs right after a restart, the last few lines before it died are the useful ones.
  • Get the exit code with docker inspect Socket-proxy --format '{{.State.ExitCode}}'
  • Still stuck? Redeploy once with the restart policy set to no so the failure stays visible.

Raise an issue

Found something which isn't working as it should? Here's how to report it.

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