Merge lp:~abentley/juju-ci-tools/reproduce-1680936 into lp:juju-ci-tools

[Aaron Bentley]

Add reproduction script for bug #1680936.

This branch provides a reproduction script for bug #1680936.

It serves as an example for future reproduction scripts.

[Curtis Hovey (sinzui)]

Thank you.

review: Approve (code)

=== added directory 'reproduction-scripts'
=== added file 'reproduction-scripts/containers_and_units.bash'
--- reproduction-scripts/containers_and_units.bash	1970-01-01 00:00:00 +0000
+++ reproduction-scripts/containers_and_units.bash	2017-04-07 19:16:59 +0000
@@ -0,0 +1,47 @@
+#!/bin/bash
+# This script reproduces bug #1680936.  It assumes a blank model.  It:
+# - deploys ubuntu (to machine 0)
+# - adds a container to machine 0
+# - removes the container from machine 0
+# - optionally waits for the container to be removed from status
+# - removes ubuntu/0
+# If machine 0 is removed, it succeeds.  If machine 0 is still there after 5
+# minutes, it fails.
+set -eux
+
+function wait_for_null(){
+  deadline="$(($(date +"%s") + 300))"
+  set +x
+  while [ $(date +"%s") -lt $deadline ]; do
+    if [ "$(juju status --format json|jq $1)" == "null" ]; then
+      echo
+      echo "Query $1 went null."
+      return 0
+    fi
+    echo -n '.'
+    sleep 1
+  done
+  echo
+  set +x
+  return 1
+}
+
+juju deploy ubuntu
+# Machine doesn't appear instantly
+sleep 1
+juju add-machine lxd:0
+juju remove-machine 0/lxd/0
+echo "Waiting for removal of machine 0/lxd/0"
+if [ ${WAIT_LXD-false} == "true" ]; then
+  wait_for_null '.machines."0".containers."0/lxd/0"'
+fi
+juju remove-unit ubuntu/0
+echo "Waiting for removal of machine 0."
+if wait_for_null '.machines."0"'; then
+  echo "SUCCESS: machine 0 was removed."
+  exit 0
+else
+  echo "FAILURE: machine 0 was not removed."
+  juju status
+  exit 1
+fi