Exec libvirt even when creating secrets

With "hostPid: true" we want the entrypoint process to be libvirtd not a wrapper so that process lifecycle management works as expected.

The fix for now is

  * start libvirtd
  * create secrets (libvirtd needs to be running for this)
  * kill it

then start it again using exec so libvirtd is the entrypoint pid
and container lifecycle should work as expected.

Change-Id: I9ef8a66da0fba70e8db4be3301833263de0617e8

libvirt/Chart.yaml

@@ -15,7 +15,7 @@ apiVersion: v1
 appVersion: v1.0.0
 description: OpenStack-Helm libvirt
 name: libvirt
-version: 0.1.8
+version: 0.1.9
 home: https://libvirt.org
 sources:
   - https://libvirt.org/git/?p=libvirt.git;a=summary

libvirt/templates/bin/_libvirt.sh.tpl

@@ -169,9 +169,14 @@ EOF
     create_virsh_libvirt_secret ${EXTERNAL_CEPH_CINDER_USER} ${LIBVIRT_EXTERNAL_CEPH_CINDER_SECRET_UUID} ${EXTERNAL_CEPH_CINDER_KEYRING}
   fi
 
-  # rejoin libvirtd
+  cleanup
-  wait
+
-else
+  # stop libvirtd; we needed it up to create secrets
-  #NOTE(portdirect): run libvirtd as a transient unit on the host with the osh-libvirt cgroups applied.
+  LIBVIRTD_PID=$(cat /var/run/libvirtd.pid)
-  exec cgexec -g ${CGROUPS%,}:/osh-libvirt systemd-run --scope --slice=system libvirtd --listen
+  kill $LIBVIRTD_PID
+  tail --pid=$LIBVIRTD_PID -f /dev/null
+
 fi
+
+#NOTE(portdirect): run libvirtd as a transient unit on the host with the osh-libvirt cgroups applied.
+exec cgexec -g ${CGROUPS%,}:/osh-libvirt systemd-run --scope --slice=system libvirtd --listen

releasenotes/notes/libvirt.yaml

@@ -9,4 +9,5 @@ libvirt:
   - 0.1.6 Enhancement to enable probes override from values.yaml
   - 0.1.7 Add libvirt overrides for Victoria and Wallaby
   - 0.1.8 Update htk requirements
+  - 0.1.9 Exec libvirt instead of forking from bash
 ...