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Docker : Portainer - A Web-Based Management Interface for Docker

This article explains how Portainer can be used to manage a local Docker environment. The Portainer interface allows you to view and control a number of aspects of the Docker environment, both local and remote. It should be self explanatory if you have used Docker from the command line, but it can make understanding the environment easier for a beginner.

Thanks for Roel Hartman for mentioning Portainer in one of his Docker presentations, which was the first time I had heard of it.

Related articles.

Basic Installation

The installation page on the Portainer website gives and explanation of how to get Portainer running. It's just a Docker image, so it's really easy. As a one-off run I did the following, as described in the documentation.

docker volume create portainer_data
docker run -d -p 9000:9000 -v /var/run/docker.sock:/var/run/docker.sock -v portainer_data:/data portainer/portainer

Docker Compose

If you're using Docker Compose, it's easy to add Portainer as another service into the "docker-compose.yml" file.

version: '3'

services:
  # Your other service definitions here.

  # Portainer
  portainerservice:
    image: portainer/portainer
    volumes:
      - portainer_data:/data
      - /var/run/docker.sock:/var/run/docker.sock
    ports:
      - "9000:9000"

volumes:
  portainer_data:

You can see it incorporated into the "docker-compose.yml" file for an Oracle database and ORDS stack here.

Docker Swarm

If you're using Docker Swarm, it's easy to add Portainer as another service into the "docker-stack.yml" file.

version: '3'

services:
  # Your other service definitions here.

  # Portainer
  portainer:
    image: portainer/portainer
    deploy:
      placement:
        constraints: [node.role == manager]
      replicas: 1
      restart_policy:
        condition: on-failure
      resources:
        limits:
          cpus: "1"
    ports:
      - "9000:9000"
    volumes:
      - portainer_data:/data
      - /var/run/docker.sock:/var/run/docker.sock

volumes:
  portainer_data:

You can see it incorporated into the "docker-stack.yml" file for an Oracle database and ORDS stack here.

Basic Usage

Once the Portainer container is running, you can access it on the port you mapped to port 9000. In this case port 9000.

http://localhost:9000

On first login you are prompted to create an admin user. Enter the credentials and click the "Create user" button.

Portainer : Create Admin User

Click the "Local" button.

Portainer : Manage Local Environment

Click the "Connect" button.

Portainer : Connect

Click the "local" environment pane.

Portainer : Local Environment

Click the "Containers" pane.

Portainer : Dashboard

The resulting page displays all the containers in the local environment.

Portainer : Containers

If you've used Docker before, you should see a lot of familiar things in the menus and panels you've seen already. Click around and familiarise yourself with the Portainer interface.

For more information see:

Hope this helps. Regards Tim...

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