Config & deployments to update overcloud packages

This change adds config and deployment resources to trigger package
updates on nodes. The deployments are triggered by doing a stack-update
and setting one of the parameters to a unique value.

The intent is that rolling update will be controlled by setting
breakpoints on all of the UpdateDeployment resources inside the
role resource groups.

Change-Id: I56bbf944ecd6cbdbf116021b8a53f9f9111c134f

2 files changed, 67 insertions, 0 deletions

diff --git a/extraconfig/tasks/yum_update.sh b/extraconfig/tasks/yum_update.sh
new file mode 100755
index 00000000..3d4c772b
--- /dev/null
+++ b/extraconfig/tasks/yum_update.sh
@@ -0,0 +1,41 @@
+#!/bin/bash
+
+# A heat-config-script which runs yum update during a stack-update.
+# Inputs:
+#   deploy_action - yum will only be run if this is UPDATE
+#   update_identifier - yum will only run for previously unused values of update_identifier
+#   command - yum sub-command to run, defaults to "update"
+#   command_arguments - yum command arguments, defaults to ""
+
+echo "Started yum_update.sh on server $deploy_server_id at `date`"
+
+if [[ -z "$update_identifier" ]]; then
+    echo "Not running due to unset update_identifier"
+    exit 0
+fi
+
+timestamp_dir=/var/lib/overcloud-yum-update
+mkdir -p $timestamp_dir
+
+# sanitise to remove unusual characters
+update_identifier=${update_identifier//[^a-zA-Z0-9-_]/}
+
+timestamp_file="$timestamp_dir/$update_identifier"
+if [[ -a "$timestamp_file" ]]; then
+    echo "Not running for already-run timestamp \"$update_identifier\""
+    exit 0
+fi
+touch "$timestamp_file"
+
+command=${command:-update}
+full_command="yum -y $command $command_arguments"
+echo "Running: $full_command"
+
+result=$($full_command)
+return_code=$?
+echo "$result"
+echo "yum return code: $return_code"
+
+echo "Finished yum_update.sh on server $deploy_server_id at `date`"
+
+exit $return_code
diff --git a/extraconfig/tasks/yum_update.yaml b/extraconfig/tasks/yum_update.yaml
new file mode 100644
index 00000000..e918149e
--- /dev/null
+++ b/extraconfig/tasks/yum_update.yaml
@@ -0,0 +1,26 @@
+heat_template_version: 2014-10-16
+
+description: >
+  Software-config for performing package updates using yum
+
+resources:
+
+  config:
+    type: OS::Heat::SoftwareConfig
+    properties:
+      group: script
+      config: {get_file: yum_update.sh}
+      inputs:
+      - name: update_identifier
+        description: yum will only run for previously unused values of update_identifier
+        default: ''
+      - name: command
+        description: yum sub-command to run, defaults to "update"
+        default: update
+      - name: command_arguments
+        description: yum command arguments, defaults to ""
+        default: ''
+
+outputs:
+  OS::stack_id:
+    value: {get_resource: config}
\ No newline at end of file