lxd-stophook: Adds stop hook wrapper for the lxd command

This command is intended to replace the `lxd` command in the snap so that existing running containers that are stopping will call this script as part of their stop hooks. This will then "route" the command to the `lxd-user` command that will be statically compiled so that it can connect to the running LXD daemon via the unix socket to indicate the container is stopping, even after refreshing the LXD snap to a different core base snap. Signed-off-by: Thomas Parrott <[email protected]>
canonical · Oct 9, 2024 · 4d10cbd · 4d10cbd
1 parent 34dd519
commit 4d10cbd
Show file tree

Hide file tree

Showing 2 changed files with 9 additions and 0 deletions.
diff --git a/snapcraft.yaml b/snapcraft.yaml
@@ -1602,6 +1602,7 @@ parts:
     organize:
       commands/snap-query: bin/
       hooks/: snap/hooks/
+      wrappers/lxd-stophook: bin/lxd
       wrappers/gpu-2404-custom-wrapper: bin/
       wrappers/editor: bin/
       wrappers/remote-viewer: bin/

diff --git a/snapcraft/wrappers/lxd-stophook b/snapcraft/wrappers/lxd-stophook
@@ -0,0 +1,8 @@
+#!/bin/sh
+# Use exec so that this script process is replaced.
+# This avoids polluting the process tree with this wrapper script.
+if [ "$1" = "callhook" ]; then
+    exec /snap/lxd/current/bin/lxd-user "$@"
+fi
+
+exec lxd "$@"