From 9f1fc50de23a34dd4ff6885512ee588013ee3f83 Mon Sep 17 00:00:00 2001
From: LIU Yulong <i@liuyulong.me>
Date: Mon, 9 Sep 2024 17:14:37 +0800
Subject: [PATCH] Add devstack plugin to enable ovs metadata_path

Partially-Implements: blueprint distributed-metadata-datapath
Change-Id: Ic34981480dd1796c2e11a9e62fbaece97ef827c1
---
 devstack/lib/metadata_path                 | 7 +++++++
 devstack/ml2-ovs-compute-local.conf.sample | 2 ++
 devstack/plugin.sh                         | 6 ++++++
 3 files changed, 15 insertions(+)
 create mode 100644 devstack/lib/metadata_path

diff --git a/devstack/lib/metadata_path b/devstack/lib/metadata_path
new file mode 100644
index 00000000000..ca16ea05706
--- /dev/null
+++ b/devstack/lib/metadata_path
@@ -0,0 +1,7 @@
+function configure_ovs_metadata_path {
+    sudo ovs-vsctl -- --may-exist add-br br-meta
+    plugin_agent_add_l2_agent_extension "metadata_path"
+    iniset /$NEUTRON_CORE_PLUGIN_CONF metadata metadata_proxy_shared_secret $SERVICE_PASSWORD
+    iniset /$NEUTRON_CORE_PLUGIN_CONF metadata nova_metadata_host $SERVICE_HOST
+    iniset /$NEUTRON_CORE_PLUGIN_CONF metadata nova_metadata_port $METADATA_SERVICE_PORT
+}
diff --git a/devstack/ml2-ovs-compute-local.conf.sample b/devstack/ml2-ovs-compute-local.conf.sample
index 6ab5f105ef5..6881caca6af 100644
--- a/devstack/ml2-ovs-compute-local.conf.sample
+++ b/devstack/ml2-ovs-compute-local.conf.sample
@@ -54,6 +54,8 @@ tunnel_types=vxlan,gre
 # Uncomment the following to enable distributed DHCP for openvswitch agent
 # for your compute node.
 #extensions = dhcp
+# Enable Neutron Openvswitch Agent metadata path extenison.
+#extensions = dhcp,metadata_path
 
 [[post-config|$Q_L3_CONF_FILE]]
 [DEFAULT]
diff --git a/devstack/plugin.sh b/devstack/plugin.sh
index 8af511af877..ad10f156bd2 100644
--- a/devstack/plugin.sh
+++ b/devstack/plugin.sh
@@ -8,6 +8,7 @@ source $LIBDIR/l2_agent_sriovnicswitch
 source $LIBDIR/l3_agent
 source $LIBDIR/l3_conntrack_helper
 source $LIBDIR/l3_ndp_proxy
+source $LIBDIR/metadata_path
 source $LIBDIR/ml2
 source $LIBDIR/network_segment_range
 source $LIBDIR/segments
@@ -69,6 +70,11 @@ if [[ "$1" == "stack" ]]; then
                     configure_ovs_distributed_dhcp
                 fi
             fi
+            if is_service_enabled q-metadata-path neutron-metadata-path; then
+                if [ $Q_AGENT = openvswitch ]; then
+                    configure_ovs_metadata_path
+                fi
+            fi
             if is_service_enabled neutron-local-ip; then
                 configure_local_ip
             fi