Avoid auto switching agent to cluster mode

[smartnexus]

I have a Swarm cluster for some network reasons, but I deploy containers in a specific node each time (depending on some requirements). So I want to launch my agent running on Docker standalone but it detects node is part of Swarm cluster, and switches to cluster mode, failing start.

2022/06/21 08:01:56 [INFO] [main] [message: Agent running on Docker platform]
2022/06/21 08:01:56 [DEBUG] [main] [Member tags: &{AgentPort:9001 EdgeKeySet:false NodeName:mars DockerConfiguration:{EngineStatus:2 Leader:false NodeRole:2} KubernetesConfiguration:{}}]
2022/06/21 08:01:56 [INFO] [main] [message: Agent running on a Swarm cluster node. Running in cluster mode]
2022/06/21 08:01:56 [DEBUG] [docker] [network_name: bridge] [scope: local] [ingress: false] [message: Skipping invalid container network]
2022/06/21 08:01:56 [WARN] [main] [message: Unable to retrieve agent container IP address, using '0.0.0.0' instead] [error: unable to retrieve the address on which the agent can advertise. Check your network settings]
2022/06/21 08:01:59 [ERROR] [main] [host: tasks.] [message: Unable to retrieve a list of IP associated to the host] [error: lookup tasks. on 172.16.0.2:53: no such host]

This is the cmd I am using: docker run -it --rm -p 9001:9001 --name portainer_agent -v /var/run/docker.sock:/var/run/docker.sock -v /var/lib/docker/volumes:/var/lib/docker/volumes -e LOG_LEVEL=DEBUG portainer/agent:2.13.1

I think it will be nice to have an environment variable to disable auto swtiching.

[smartnexus]

The key would be to add another condition to the if statement checking options var https://github.com/portainer/agent/blob/52536ce32c7a2377d35cd19ba5e0301bb759fdd6/cmd/agent/main.go#L80

[jamescarppe]

For Portainer to work across a Swarm cluster, even when deploying containers to specific swarm nodes, the agent needs to be running on all the nodes in the cluster. Without it, functionality would be severely limited.

[smartnexus]

With this the agent is going to be running in all swarm nodes, but not as a swarm cluster, just a bunch of nodes that are accesible by L3. When the agent runs in swarm mode, deploy is done by "docker stack deploy" and sometimes makes sense to use "docker compose" in just one node

[madpeteguy]

Hey, i have just ran into simmilar problem, and i love proposed solution.

My docker nodes are separate instances, mostly running container in macvlans. They are joined in swarm only for prometheus monitoring, no more services use swarm. I would like portainer agents to ignore swarm mode and act like on single docker. Swarm is only to provide an overlay network for monitoring, nodes are hosting dedicated services, as they are required to work separately, even if all other nodes are not reachable.

At last, they are managed separately even when connected as swarm.

[IlDordollano]

I have the same issue. It would be nice to have this feature implemented.