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ssh_key_setup.md

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SSH Key Setup

From the commandline, type ssh-keygen This will then generate a new RSA Key pair; a public file and a private file. ssh-keygen will ask for a filename, type myhost; The Public file will be named myhost.pub and the private key file will be named myhost.

Add the new private key

We will now add the new private key to our local PC/Mac/Linux machine, Type: ssh-add myhost. This will add the private key to our machine. If you get an error with this, run the following command:

eval `ssh-agent -s`
ssh-add

ssh-copy-id

To copy and install the newly generated public key to the Raspberry Pi's we can use the ssh-copy-id command:

ssh-copy-id -i ~/.ssh/myhost.pub <IP_ADDRESS>

where <IP_ADDRESS> is the IP address of the Raspberry Pi we want to copy it to.

Once copied we can now test that this works:

ssh pi@192.168.1.235
  • in this example the Raspberry Pi has the ip address 192.168.1.235. Ssh should login without the need for a password.

To remove hosts use

ssh-add -R <remotehost>

Rinse & Repeat

Repeat this process for all the Raspberry Pis in your cluster.

Install and setup Portainer

docker run -d -p 8000:8000 -p 9443:9443 --name portainer --restart=always -v /var/run/docker.sock:/var/run/docker.sock -v portainer_data:/data cr.portainer.io/portainer/portainer-ce:2.9.3