Merge ~deej/charm-telegraf/+git/bionic:master into ~telegraf-charmers/charm-telegraf:master

[David Lawson]

Add bionic support.

[Tom Haddon (mthaddon)]

LGTM

review: Approve

[🤖 Canonical IS Merge Bot (canonical-is-mergebot)]

This merge proposal is being monitored by mergebot. Change the status to Approved to merge.

[🤖 Canonical IS Merge Bot (canonical-is-mergebot)]

Change successfully merged at revision c6193e2b6b0a40bd976871256692dbf694928a77

diff --git a/metadata.yaml b/metadata.yaml
index 1405d22..d590b29 100644
--- a/metadata.yaml
+++ b/metadata.yaml
@@ -33,6 +33,7 @@ tags:
 series:
   - xenial
   - trusty
+  - bionic
 subordinate: true
 requires:
   mysql:
diff --git a/reactive/telegraf.py b/reactive/telegraf.py
index bc80995..94de186 100644
--- a/reactive/telegraf.py
+++ b/reactive/telegraf.py
@@ -187,6 +187,7 @@ def check_prometheus_port(key, new_port):
     existing_port = kv.get(unitdata_key)
     if existing_port != new_port:
         hookenv.open_port(new_port)
+        hookenv.log("Opened port {}".format(new_port))
         if existing_port:  # Dont try to close non existing ports
             hookenv.close_port(existing_port)
             charms.promreg.deregister(None, existing_port)