Docker Swarm Commands

Docker Swarm is controlled with the Docker CLI, which has different commands for doing tasks in the Swarm cluster. Here are some common Docker Swarm commands:

Initialize Swarm:

Initialize Swarm on the Manager Node:
```
  docker swarm init --advertise-addr <manager-node-ip>
```
This initializes a new Docker Swarm on the manager node.
Join Worker Nodes to the Swarm:
```
  docker swarm join --token <worker-token> <manager-node-ip>:2377
```
Use the join token generated during swarm initialization to join worker nodes to the swarm.

Services and Stacks:

Deploy a Service:
```
  docker stack deploy -c <compose-file> <stack-name>
```
Deploy a service or stack using a Docker Compose file.
Scale a Service:
```
  docker service scale <service-name>=<replica-count>
```
Scale the number of replicas for a service.
List Services:
```
  docker service ls
```
List all services in the swarm.
Inspect Service:
```
  docker service inspect <service-name>
```
Get detailed information about a specific service.

Nodes:

List Nodes:
```
  docker node ls
```
List all nodes in the swarm.
Inspect Node:
```
  docker node inspect <node-id>
```
Get detailed information about a specific node.
Update Node Availability:
```
  docker node update --availability drain <node-id>
```
Mark a node as drained (do not schedule new tasks on the node).

Secrets:

Create a Secret:

  echo "my_secret" | docker secret create <secret-name> -

Create a secret to be used by services.

List Secrets:
```
  docker secret ls
```
List all secrets in the swarm.

Network:

List Networks:
```
  docker network ls
```
List all networks in the swarm.
Inspect Network:
```
  docker network inspect <network-id>
```
Get detailed information about a specific network.

Stack Removal:

Remove a Stack:
```
  docker stack rm <stack-name>
```
Remove a deployed stack.

Leave Swarm:

Leave Swarm (Worker Node):
```
  docker swarm leave
```
Instruct a worker node to leave the swarm.
Leave Swarm (Manager Node):
```
  docker swarm leave --force
```
Forcefully remove a manager node from the swarm.

These commands help you manage a Docker Swarm in a simple way. Docker Swarm has more advanced features, and you can learn about more commands and options in the official Docker Swarm documentation.