docker-puppet.py: used dedicated hiera entry, not uuid

Currently it is not possible to do per-node customization inside
docker-puppet.py because it overrides the fact 'uuid'.

This change adds a dedicated docker_puppet entry in hiera.yaml so that
docker-puppet.py needs to do nothing special for
/etc/puppet/hieradata/docker_puppet.json to be included in the hiera
merge.

Change-Id: Icf37dcd63e0152ee15e9f0079b45e31a4f8d9fbb
Depends-On: https://review.openstack.org/#/c/605478/
Closes-Bug: #1761624

docker/docker-puppet.py

@@ -245,7 +245,7 @@ with open(sh_script, 'w') as script_file:
     mkdir -p /etc/puppet
     cp -a /tmp/puppet-etc/* /etc/puppet
     rm -Rf /etc/puppet/ssl # not in use and causes permission errors
-    echo "{\\"step\\": $STEP}" > /etc/puppet/hieradata/docker.json
+    echo "{\\"step\\": $STEP}" > /etc/puppet/hieradata/docker_puppet.json
     TAGS=""
     if [ -n "$PUPPET_TAGS" ]; then
         TAGS="--tags \"$PUPPET_TAGS\""
@@ -263,7 +263,8 @@ with open(sh_script, 'w') as script_file:
     if [ "$NET_HOST" == "false" ]; then
         export FACTER_hostname=$HOSTNAME
     fi
-    export FACTER_uuid=docker
+    # $::deployment_type in puppet-tripleo
+    export FACTER_deployment_type=containers
     /usr/bin/puppet apply --summarize \
             --detailed-exitcodes \
             --color=false \

docker/services/containers-common.yaml

@@ -64,8 +64,9 @@ outputs:
             # ignore copy failures as these may be the same file depending on docker mounts
             cp -a /tmp/puppet-etc/* /etc/puppet || true
           fi
-          echo "{\"step\": ${STEP}}" > /etc/puppet/hieradata/docker.json
+          echo "{\"step\": ${STEP}}" > /etc/puppet/hieradata/docker_puppet.json
-          export FACTER_uuid=docker
+          # $::deployment_type in puppet-tripleo
+          export FACTER_deployment_type=containers
           set +e
           puppet apply $EXTRA_ARGS \
               --verbose \

puppet/role.role.j2.yaml

@@ -664,6 +664,7 @@ resources:
       config:
         hierarchy:
           - '"%{::uuid}"'
+          - docker_puppet # Optionally provided by docker-puppet.py
           - heat_config_%{::deploy_config_name}
           - config_step
           - {{role.name.lower()}}_extraconfig