Remove dependency to panko

Panko is being deprecated and removed from OpenStack.

Change-Id: I6948a965cba5e3bdba84edbbb49af279fd0310e5

ceilometer/pipeline/data/event_pipeline.yaml

@@ -8,4 +8,4 @@ sources:
 sinks:
     - name: event_sink
       publishers:
-          - panko://
+          - notifier://

devstack/plugin.sh

@@ -207,12 +207,7 @@ function _ceilometer_configure_cache_backend {
 # Set configuration for storage backend.
 function _ceilometer_configure_storage_backend {
     if [ "$CEILOMETER_BACKEND" = 'none' ] ; then
-        # It's ok for the backend to be 'none', if panko is enabled. We do not
-        # combine this condition with the outer if statement, so that the else
-        # clause below is not executed.
-        if ! is_service_enabled panko-api; then
-            echo_summary "All Ceilometer backends seems disabled, set \$CEILOMETER_BACKEND to select one."
-        fi
+        echo_summary "All Ceilometer backends seems disabled, set \$CEILOMETER_BACKEND to select one."
     elif [ "$CEILOMETER_BACKEND" = 'gnocchi' ] ; then
         sed -i "s/gnocchi:\/\//gnocchi:\/\/?archive_policy=${GNOCCHI_ARCHIVE_POLICY}\&filter_project=gnocchi_swift/" $CEILOMETER_CONF_DIR/event_pipeline.yaml $CEILOMETER_CONF_DIR/pipeline.yaml
         ! [[ $DEVSTACK_PLUGINS =~ 'gnocchi' ]] && configure_gnocchi
@@ -220,12 +215,6 @@ function _ceilometer_configure_storage_backend {
         die $LINENO "Unable to configure unknown CEILOMETER_BACKEND $CEILOMETER_BACKEND"
     fi
 
-    # configure panko
-    if is_service_enabled panko-api; then
-        if ! grep -q 'panko' $CEILOMETER_CONF_DIR/event_pipeline.yaml ; then
-            echo '          - panko://' >> $CEILOMETER_CONF_DIR/event_pipeline.yaml
-        fi
-    fi
 }
 
 # Configure Ceilometer

doc/source/admin/telemetry-data-pipelines.rst

@@ -169,13 +169,6 @@ You can read more `here <https://github.com/prometheus/pushgateway#about-timesta
 Due to this, this is not recommended to use this publisher for billing purpose
 as timestamps in Prometheus will not be exact.
 
-panko
-`````
-
-Event data in Ceilometer can be stored in panko which provides an HTTP REST
-interface to query system events in OpenStack. To push data to panko,
-set the publisher to ``panko://``.
-
 notifier
 ````````
 
@@ -327,6 +320,5 @@ specified. A sample ``publishers`` section in the
 
    publishers:
        - gnocchi://
-       - panko://
        - udp://10.0.0.2:1234
        - notifier://?policy=drop&max_queue_length=512&topic=custom_target

doc/source/contributor/devstack.rst

@@ -28,7 +28,6 @@ Configuring devstack
    Optionally, services which extend Ceilometer can be enabled::
 
      enable_plugin aodh https://opendev.org/openstack/aodh
-     enable_plugin panko https://opendev.org/openstack/panko
 
    These plugins should be added before ceilometer.