Add an os-collect-config element.

Change-Id: I8b27678bb8495d10b355aa7f6370a4f86f6c957d

elements/os-collect-config/README.md

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+Setup os-collect-config to run as a system service. By default it will
+run os-refresh-config on any changes.
+
+Configuration
+-------------
+
+Heat Metadata can be used to configure os-collect-config:
+
+    os-collect-config:
+      command: os-refresh-config
+      cachedir: /var/run/os-collect-config
+      collectors: heat_local,ec2,cfn
+      polling_interval: 300
+      cfn:
+        metadata_url: http://foo:8000/v1
+        heat_metadata_hint: /var/lib/heat-cfntools/cfn-metadata-server
+        stack_name: required-stack-name
+        access_key_id: abcdefghijklmnop091234
+        secret_access_key: fffeeeeddddccccaaaa99999
+        path: ThisResource.Metadata
+      ec2:
+        metadata_url: http://169.254.169.254/latest/meta-data
+      heat_local:
+        path: /var/lib/heat-cfntools/cfn-init-data
+
+Note that `metadata_url` is optional, as it should be determined by the
+file `heat_metadata_hint` refers to. This file is injected by Heat via
+cloud-init at first boot. Those two parameters are the only optional
+parameters. All of the others are required for the cfn data source
+to function.
+
+`ec2` and `heat_local` do not require any configuration to work.

elements/os-collect-config/element-deps

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+source-repositories

elements/os-collect-config/install.d/10-os-collect-config

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+#!/bin/bash
+set -eux
+
+install-packages python-pip build-essential libxslt-dev libxml2-dev python-dev
+
+pip install /opt/stack/os-collect-config
+
+# Upstart
+if [ -d /etc/init ] ; then
+    cat > /etc/init/os-collect-config.conf <<eof
+start on runlevel [2345]
+stop on runlevel [016]
+respawn
+exec os-collect-config
+eof
+
+# Systemd
+elif [ -d /lib/systemd/system ] ; then
+    cat > /lib/systemd/system/os-collect-config.service <<eof
+[Unit]
+Description=Collect metadata and run hook commands.
+After=cloud-final.service
+Before=crond.service
+
+[Service]
+ExecStart=/bin/os-collect-config
+Restart=on-failure
+
+[Install]
+WantedBy=multi-user.target
+eof
+
+  # Make systemd take notice of it
+  systemctl daemon-reload
+
+  # Enable the service
+  systemctl enable os-collect-config.service
+
+else
+    echo Only systems with systemd or upstart are supported.
+    exit 1
+fi

elements/os-collect-config/os-apply-config/etc/os-collect-config/os-collect-config.conf

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+[DEFAULT]
+{{^os-collect-config.command}}
+command = os-refresh-config
+{{/os-collect-config.command}}
+{{#os-collect-config}}
+{{#command}}
+command = {{command}}
+{{/command}}
+{{#polling_interval}}
+polling_interval = {{polling_interval}}
+{{/polling_interval}}
+{{#cachedir}}
+cachedir = {{cachedir}}
+{{/cachedir}}
+{{#collectors}}
+collectors = {{collectors}}
+{{/collectors}}
+
+{{#cfn}}
+[cfn]
+metadata_url = {{metadata_url}}
+stack_name = {{stack_name}}
+secret_access_key = {{secret_access_key}}
+access_key_id = {{access_key_id}}
+{{/cfn}}
+{{/os-collect-config}}

elements/os-collect-config/source-repository-os-collect-config

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+os-collect-config git /opt/stack/os-collect-config https://github.com/stackforge/os-collect-config.git