fix(ci): add SSH credential diagnostics to deploy stage

Reviewed-on: http://gitea.lan:3000/robbond/pleskSaas/pulls/53

Jenkinsfile

@@ -87,25 +87,37 @@ stage('Deploy') {
   steps {
     withCredentials([sshUserPrivateKey(
       credentialsId: "${env.DEPLOY_SSH_CREDENTIAL_ID}",
-      keyFileVariable: 'SSH_KEY'
+      keyFileVariable: 'SSH_KEY',
+      usernameVariable: 'SSH_USER'
     )]) {
       sh '''
+bash <<EOF
 set -euxo pipefail
 
+SSH_OPTS="-i ${SSH_KEY} -o BatchMode=yes -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null"
+
+echo "SSH user from credential: ${SSH_USER}"
+echo "SSH key file path: ${SSH_KEY}"
+ls -l "${SSH_KEY}"
+ssh-keygen -y -f "${SSH_KEY}"
+
+echo "Testing remote SSH connectivity"
+ssh ${SSH_OPTS} "${SSH_USER}@${APP_HOST}" "whoami && hostname && pwd"
+
 echo "Deploying image tag: ${IMAGE_BUILD}"
 docker image inspect "${IMAGE_BUILD}" --format='{{.Id}} {{.RepoTags}}'
 
-ssh -i "$SSH_KEY" "$APP_USER@$APP_HOST" "mkdir -p $DEPLOY_PATH/scripts"
+ssh ${SSH_OPTS} "$SSH_USER@$APP_HOST" "mkdir -p $DEPLOY_PATH/scripts"
 
 rsync -az \
-  -e "ssh -i $SSH_KEY" \
+  -e "ssh ${SSH_OPTS}" \
   docker-compose.prod.yml \
-  "$APP_USER@$APP_HOST:$DEPLOY_PATH/"
+  "$SSH_USER@$APP_HOST:$DEPLOY_PATH/"
 
 rsync -az \
-  -e "ssh -i $SSH_KEY" \
+  -e "ssh ${SSH_OPTS}" \
   scripts/ \
-  "$APP_USER@$APP_HOST:$DEPLOY_PATH/scripts/"
+  "$SSH_USER@$APP_HOST:$DEPLOY_PATH/scripts/"
 
 IMAGE_TAR="plesk-agency-portal-build.tar"
 echo "Creating image archive: ${IMAGE_TAR}"
@@ -114,27 +126,28 @@ ls -lh "${IMAGE_TAR}"
 sha256sum "${IMAGE_TAR}"
 
 echo "Copying image archive to remote host via scp"
-scp -i "$SSH_KEY" "${IMAGE_TAR}" "$APP_USER@$APP_HOST:$DEPLOY_PATH/"
+scp ${SSH_OPTS} "${IMAGE_TAR}" "$SSH_USER@$APP_HOST:$DEPLOY_PATH/"
 
 echo "Verifying image archive exists on remote host"
-ssh -i "$SSH_KEY" "$APP_USER@$APP_HOST" "ls -lh $DEPLOY_PATH/plesk-agency-portal-build.tar"
-ssh -i "$SSH_KEY" "$APP_USER@$APP_HOST" "sha256sum $DEPLOY_PATH/plesk-agency-portal-build.tar"
+ssh ${SSH_OPTS} "$SSH_USER@$APP_HOST" "ls -lh $DEPLOY_PATH/plesk-agency-portal-build.tar"
+ssh ${SSH_OPTS} "$SSH_USER@$APP_HOST" "sha256sum $DEPLOY_PATH/plesk-agency-portal-build.tar"
 
 echo "Loading image archive on remote host"
-ssh -i "$SSH_KEY" "$APP_USER@$APP_HOST" "docker load -i $DEPLOY_PATH/plesk-agency-portal-build.tar"
+ssh ${SSH_OPTS} "$SSH_USER@$APP_HOST" "docker load -i $DEPLOY_PATH/plesk-agency-portal-build.tar"
 
 echo "Verifying exact image tag is available on remote host"
-ssh -i "$SSH_KEY" "$APP_USER@$APP_HOST" "docker image inspect ${IMAGE_BUILD} --format='{{.Id}} {{.RepoTags}}'"
+ssh ${SSH_OPTS} "$SSH_USER@$APP_HOST" "docker image inspect ${IMAGE_BUILD} --format='{{.Id}} {{.RepoTags}}'"
 
-ssh -i "$SSH_KEY" "$APP_USER@$APP_HOST" \
+ssh ${SSH_OPTS} "$SSH_USER@$APP_HOST" \
   "cd $DEPLOY_PATH && chmod +x ./scripts/deploy-prod.sh ./scripts/smoke-check.sh ./scripts/rollback-prod.sh"
 
 echo "Running remote deploy script with exact image tag"
-ssh -i "$SSH_KEY" "$APP_USER@$APP_HOST" \
+ssh ${SSH_OPTS} "$SSH_USER@$APP_HOST" \
   "cd $DEPLOY_PATH && APP_IMAGE='${IMAGE_BUILD}' ./scripts/deploy-prod.sh"
 
 echo "Printing final running container image metadata"
-ssh -i "$SSH_KEY" "$APP_USER@$APP_HOST" "docker inspect plesk-agency-portal --format='{{.Image}} {{.Created}}'"
+ssh ${SSH_OPTS} "$SSH_USER@$APP_HOST" "docker inspect plesk-agency-portal --format='{{.Image}} {{.Created}}'"
+EOF
       '''
     }
   }