Refactor SSH configuration and test SSH connection in ansible-apply.yaml

.github/workflows/ansible-apply.yaml

@@ -40,8 +40,8 @@ jobs:
           TRUSTED_HOSTS: ${{ secrets.TRUSTED_HOSTS }}
         run: |
           mkdir -p ~/.ssh
-          for host in $TRUSTED_HOSTS; do
-            ssh-keyscan $host >> ~/.ssh/known_hosts
+          for HOST in $TRUSTED_HOSTS; do
+            ssh-keyscan $HOST >> ~/.ssh/known_hosts
           done
           chmod 600 ~/.ssh/known_hosts
 
@@ -51,6 +51,15 @@ jobs:
           echo "  HostKeyAlgorithms +sk-ecdsa-sha2-nistp256@openssh.com, sk-ssh-ed25519@openssh.com"
           chmod 600 ~/.ssh/config
 
+      - name: Check SSH Connection
+        env:
+          VAULT_MASTER_PASSWORD: ${{ secrets.VAULT_MASTER_PASSWORD }}
+          ANSIBLE_USER: ${{ secrets.ANSIBLE_USER }}
+        run: |
+          for HOST in $TRUSTED_HOSTS; do
+            ssh -vvvv -i ~/.ssh/id_ecdsa $ANSIBLE_USER@$HOST echo "SSH connection to $HOST successful"
+          done
+
       - name: Apply Ansible Playbook
         env:
           VAULT_MASTER_PASSWORD: ${{ secrets.VAULT_MASTER_PASSWORD }}