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Simple port mapping example

First prepare your deploy setup. Notice the last two lines, which means that node0 port 22 will get mapped to host port 2222, and node1 port 22 will get mapped to host port 2223:

$ cat bootloose.yaml
cluster:
  name: cluster
  privateKey: cluster-key
machines:
- count: 2
  spec:
    image: quay.io/k0sproject/bootloose-debian12
    name: node%d
    portMappings:
    - containerPort: 22
      hostPort: 2222

Now you can deploy your cluster:

$ bootloose create
INFO[0000] Image: quay.io/k0sproject/bootloose-debian12 present locally 
INFO[0000] Creating machine: cluster-node0 ...          
INFO[0001] Creating machine: cluster-node1 ...

You now have two container running, listening on SSH port 2222 and 2223 of the host:

$ ssh [email protected] -p 2222 -i cluster-key hostname
The authenticity of host '[127.0.0.1]:2222 ([127.0.0.1]:2222)' can't be established.
ECDSA key fingerprint is SHA256:rUXnIB9Nmpy8bzEOcr2MWLVOdkzs9dLSXh7mfP/v7Po.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added '[127.0.0.1]:2222' (ECDSA) to the list of known hosts.
node0

$ ssh [email protected] -p 2223 -i cluster-key hostname
The authenticity of host '[127.0.0.1]:2223 ([127.0.0.1]:2223)' can't be established.
ECDSA key fingerprint is SHA256:0vFd0G655FY1PA/04MZKbT/4dmxP8O+hrzMJs/83uaw.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added '[127.0.0.1]:2223' (ECDSA) to the list of known hosts.
node1

When finished, clean up:

$ bootloose delete
INFO[0000] Deleting machine: cluster-node0 ...          
INFO[0000] Deleting machine: cluster-node1 ...