1.7 KiB
Fixing Portainer Error: "The environment named local is unreachable"
Problem
After migrating the Docker Swarm to an Ubuntu container, the Portainer UI shows the error "The environment named local is unreachable".
Cause
This error means the Portainer server container cannot communicate with the Docker daemon it is supposed to manage. This communication happens through the Docker socket file, located at /var/run/docker.sock.
In your nested environment (HAOS > Ubuntu Container > Portainer Container), the issue is almost certainly that the user inside the Portainer container does not have the necessary file permissions to access the /var/run/docker.sock file that belongs to the Ubuntu container's Docker instance.
Solution (To be performed in your deployment environment)
You need to ensure the Portainer container runs with a user that has permission to access the Docker socket.
1. Find the Docker Group ID:
First, SSH into your Ubuntu container that is running the swarm. Then, run this command to find the group ID (gid) that owns the Docker socket:
stat -c '%g' /var/run/docker.sock
This will return a number. This is the DOCKER_GROUP_ID.
2. Edit the portainer-stack.yml:
You need to add a user directive to the portainer service definition in your portainer-stack.yml file. This tells the service to run as the root user and with the Docker group, granting it the necessary permissions.
I will make this edit for you now, using a placeholder for the group ID. You will need to replace DOCKER_GROUP_ID_HERE with the number you get from the command above before you deploy.
This is the most common and secure way to resolve this issue without granting full privileged access.