snapcraft: add qemu.external-snap snap config option

Signed-off-by: Alexander Mikhalitsyn <[email protected]>

snapcraft.yaml

@@ -51,6 +51,7 @@ description: |-
    - openvswitch.external: Use the system's OVS tools (ignores openvswitch.builtin) [default=false]
    - ovn.builtin: Use snap-specific OVN configuration [default=false]
    - ui.enable: Enable the web interface [default=true]
+   - qemu.external-snap: Enable use of external QEMU from snap ("external-qemu" plug) [default=false]
 
  For system-wide configuration of the CLI, place your configuration in
  /var/snap/lxd/common/global-conf/ (config.yml and servercerts)

snapcraft/commands/daemon.start

@@ -180,6 +180,13 @@ echo "==> Preparing /run/bin"
 mkdir -p "/run/bin"
 export PATH="/run/bin:${PATH}"
 
+if [ "${qemu_external_snap:-"false"}" = "true" ]; then
+    echo "==> Setting up external QEMU snap integration"
+    export LD_LIBRARY_PATH="${SNAP_CURRENT}/opt/external-qemu/lib/${ARCH}:${SNAP_CURRENT}/opt/external-qemu/lib/${ARCH}/pulseaudio:${SNAP_CURRENT}/opt/external-qemu/lib/${ARCH}/ceph:${LD_LIBRARY_PATH}"
+    export PATH="${SNAP_CURRENT}/opt/external-qemu/bin:${PATH}"
+    export LXD_EXT_QEMU_SNAP=1
+fi
+
 if [ "${ceph_external:-"false"}" = "true" ]; then
     ln -s "${SNAP}/wrappers/run-host" "/run/bin/ceph"
     ln -s "${SNAP}/wrappers/run-host" "/run/bin/radosgw-admin"

snapcraft/hooks/configure

@@ -58,6 +58,7 @@ openvswitch_builtin=$(get_bool "$(snapctl get openvswitch.builtin)")
 openvswitch_external=$(get_bool "$(snapctl get openvswitch.external)")
 ovn_builtin=$(get_bool "$(snapctl get ovn.builtin)")
 ui_enable=$(get_bool "$(snapctl get ui.enable)")
+qemu_external_snap=$(get_bool "$(snapctl get qemu.external-snap)")
 
 # Special-handling of daemon.preseed
 daemon_preseed=$(snapctl get daemon.preseed)
@@ -89,6 +90,7 @@ openvswitch_builtin=${openvswitch_builtin:-"false"}
 openvswitch_external=${openvswitch_external:-"false"}
 ovn_builtin=${ovn_builtin:-"false"}
 ui_enable=${ui_enable:-"true"}
+qemu_external_snap=${qemu_external_snap:-"false"}
 EOC
 
 # Set socket ownership in case it changed