Initial Devstack support skeleton.

devstack/README.md

@@ -0,0 +1,21 @@
+This directory contains the Tatu (SSH-as-a-Service) DevStack plugin.
+
+To configure Tatu with DevStack, you will need to enable this plugin and
+the Tatu service by adding one line to the [[local|localrc]] section of
+your local.conf file.
+
+To enable the plugin, add a line of the form:
+
+    enable_plugin tatu <GITURL> [GITREF]
+
+where
+
+    <GITURL> is the URL of a Tatu repository
+    [GITREF] is an optional git ref (branch/ref/tag).  The default is master.
+
+For example
+
+    enable_plugin tatu https://github.com/pinodeca/tatu stable/queens
+
+For more information, see the "Externally Hosted Plugins" section of
+https://docs.openstack.org/devstack/latest/plugins.html

devstack/plugin.sh

@@ -0,0 +1,50 @@
+# plugin.sh - DevStack plugin.sh dispatch script
+
+function install_tatu {
+    ...
+}
+
+function init_tatu {
+    ...
+}
+
+function configure_tatu {
+    ...
+}
+
+# check for service enabled
+if is_service_enabled tatu; then
+
+    if [[ "$1" == "stack" && "$2" == "pre-install" ]]; then
+        # Set up system services
+        echo_summary "Configuring system services tatu"
+
+    elif [[ "$1" == "stack" && "$2" == "install" ]]; then
+        # Perform installation of service source
+        echo_summary "Installing tatu"
+        install_tatu
+
+    elif [[ "$1" == "stack" && "$2" == "post-config" ]]; then
+        # Configure after the other layer 1 and 2 services have been configured
+        echo_summary "Configuring tatu"
+        configure_tatu
+
+    elif [[ "$1" == "stack" && "$2" == "extra" ]]; then
+        # Initialize and start the tatu service
+        echo_summary "Initializing tatu"
+        init_tatu
+    fi
+
+    if [[ "$1" == "unstack" ]]; then
+        # Shut down tatu services
+        # no-op
+        :
+    fi
+
+    if [[ "$1" == "clean" ]]; then
+        # Remove state and transient data
+        # Remember clean.sh first calls unstack.sh
+        # no-op
+        :
+    fi
+fi

devstack/settings

@@ -0,0 +1 @@
+enable_service tatu