Add generate_secrets functionality

README.md

@@ -8,17 +8,23 @@ This is meant to be used as a [Drone plugin](http://plugins.drone.io/).
 
 ## Settings
 
-### With defaults
+### Required (no default)
+
+- **deploy_key**: SSH private key part for ssh public key authentication
+- **stack**: Name of the stack to be deployed
+
+### Optional (with defaults)
 
 - **compose** (default: `compose.yml`): compose file to use for deploying
 - **host** (default: `swarm.autonomic.zone`): Host to deploy to (don't include `ssh://`)
 - **port** (default: `222`): SSH port to connect to
 - **user** (default: `drone`): System user to connect via SSH with
 
-### Without defaults
+### Dangerous options, unwise outside CI
 
-- **deploy_key**: SSH private key part for ssh public key authentication
-- **stack**: Name of the stack to be deployed
+- **generate_secrets** (default: no): randomly set all `secrets:` found in the
+    compose file -- you won't be able to retrieve them afterwards, so you almost
+    certainly don't want this for real deployments.
 
 ## Example
 

plugin.sh

@@ -7,6 +7,16 @@ PLUGIN_HOST=${PLUGIN_HOST:-swarm.autonomic.zone}
 PLUGIN_PORT=${PLUGIN_PORT:-222}
 PLUGIN_USER=${PLUGIN_USER:-drone}
 
+generate_secrets() {
+  echo "--- start secrets ---"
+  for SECRET in $(docker run --rm -v "${PWD}":/workdir mikefarah/yq yq r "$PLUGIN_COMPOSE" 'secrets.*.name'); do 
+    eval "echo \"generating $SECRET\""
+    PW=$(</dev/urandom tr -dc 'A-Za-z0-9' | head -c 40; echo)
+    eval "echo \"$PW\" | docker secret create \"$SECRET\" -"; 
+  done
+  echo "--- end secrets ---"
+}
+
 load_deploy_key() {
   mkdir -p "$HOME/.ssh/"
   ssh-keyscan -p "$PLUGIN_PORT" "$PLUGIN_HOST" > "$HOME/.ssh/known_hosts"
@@ -34,6 +44,11 @@ run_stack_wait() {
 run_plugin() {
   echo "--- start deployment ---"
   load_deploy_key
+
+  if [ -n "$PLUGIN_GENERATE_SECRETS" ]; then
+    generate_secrets
+  fi
+
   run_stack_deploy
   run_stack_wait
   echo "--- end deployment ---"