Configure SSH for access across nodes - 2021 PTG directord hackfest

configure-nodes-for-ssh-access.sh

# Get SSH-config for nodes
vagrant ssh-config node0 > node0.ssh-config
vagrant ssh-config node1 > node1.ssh-config

# get teh SSH key path from the ssh-config
node0_ssh_key=$(ssh -F ./node0.ssh-config -G node0 | grep -m1 -oP "(?<=identityfile ).*")
echo ${node0_ssh_key}
node1_ssh_key=$(ssh -F ./node1.ssh-config -G node1 | grep -m1 -oP "(?<=identityfile ).*")
echo ${node1_ssh_key}


# Concatenate the ssh-configs
rm -rf ssh-config.local
rm -rf ssh-config.remote
cat node0.ssh-config > ssh-config.local
cat node1.ssh-config >> ssh-config.local
cat ssh-config.local
cp ssh-config.local ssh-config.remote

# Combine the authorized keys for both nodes
ssh -F ./ssh-config.local vagrant@node0 cat /home/vagrant/.ssh/authorized_keys > node0.authorized_keys
ssh -F ./ssh-config.local vagrant@node1 cat /home/vagrant/.ssh/authorized_keys > node1.authorized_keys

rm -rf authorized_keys.remote
cat node0.authorized_keys > authorized_keys.remote
cat node1.authorized_keys >> authorized_keys.remote
cat authorized_keys.remote

# Upload the combined authorized keys to the two nodes
vagrant upload authorized_keys.remote "/home/vagrant/.ssh/authorized_keys" node0
vagrant upload authorized_keys.remote "/home/vagrant/.ssh/authorized_keys" node1

# Upload one of the keys as /home/vagrant/.ssh/id_rsa so that custom config file is not required
vagrant upload ${node0_ssh_key} "/home/vagrant/.ssh/id_rsa" node0
vagrant upload ${node0_ssh_key} "/home/vagrant/.ssh/id_rsa" node1

ssh -F ./ssh-config.local vagrant@node0 chmod 600 /home/vagrant/.ssh/id_rsa
ssh -F ./ssh-config.local vagrant@node1 chmod 600 /home/vagrant/.ssh/id_rsa

# Replace the ssh key path to the local path on the nodes
sed -i "s:${node0_ssh_key}:/home/vagrant/.ssh/id_rsa:g" ssh-config.remote
sed -i "s:${node1_ssh_key}:/home/vagrant/.ssh/id_rsa:g" ssh-config.remote

# Upload the SSH config to the nodes
vagrant upload ./ssh-config.remote "/home/vagrant/.ssh/config" node0
vagrant upload ./ssh-config.remote "/home/vagrant/.ssh/config" node1
ssh -F ./ssh-config.local vagrant@node0 chmod 600 /home/vagrant/.ssh/config
ssh -F ./ssh-config.local vagrant@node1 chmod 600 /home/vagrant/.ssh/config

# SSHing to nodes from Host
ssh -F ./ssh-config.local node0
ssh -F ./ssh-config.local node1

# SSHing to nodes from nodes
ssh node0
ssh node1