(fix) Give systemd service access to env

- The service to register the rack controller pod does not
  have access to the MAAS_API_KEY env var so it fails to deregister
  when needed.

Change-Id: I16bc63ef14a2dab463dfdca11b7e3ca13d508a9e

charts/maas/templates/bin/_register-rack-controller.sh.tpl

@@ -6,11 +6,48 @@ set -x
 # to source the maas system_id
 HOST_MOUNT_PATH=${HOST_MOUNT_PATH:-"/host_cloud-init/"}
 
+get_impacted_nets() {
+  system_id="$1"
+  maas local fabrics read | jq -cr 'map(.vlans) | map(.[]) | map(select(.primary_rack == "'"$system_id"'" or .secondary_rack == "'"$system_id"'")) | .[] | {vid, fabric_id}'
+}
+
+detach_rack_controller() {
+  system_id="$1"
+  for net in $(get_impacted_nets "$system_id");
+  do
+    vid=$(echo "$net" | jq -r .vid)
+    fid=$(echo "$net" | jq -r .fabric_id)
+    maas local vlan update "$fid" "$vid" primary_rack='' secondary_rack=''
+  done
+}
+
 unregister_maas_rack() {
   sys_id="$1"
   echo "Deregister this pod as MAAS rack controller ${sys_id}."
+
   maas login local "$MAAS_ENDPOINT" "$MAAS_API_KEY"
+
+  if [[ $? -ne 0 ]];
+  then
+    echo "Could not login to MAAS API."
+    exit $?
+  fi
+
+  detach_rack_controller "$sys_id"
+
+  while [ 1 ];
+  do
     maas local rack-controller delete "$sys_id"
+
+    if [[ $? -ne 0 ]];
+    then
+      echo "Could not delete rack controller."
+      sleep 10
+    else
+      break
+    fi
+  done
+
   rm -f ~maas/maas_id
   rm -f ~maas/secret
 }
@@ -28,7 +65,7 @@ register_maas_rack() {
   # register forever
   while [ 1 ];
   do
-    if maas-rack register --url=${MAAS_ENDPOINT} --secret="${MAAS_REGION_SECRET}";
+    if maas-rack register --url="${MAAS_ENDPOINT}" --secret="${MAAS_REGION_SECRET}";
     then
         echo "Successfully registered with MaaS Region Controller"
         break
@@ -70,7 +107,12 @@ then
   if [[ "$HOST_SYSTEM_ID" != "$POD_SYSTEM_ID" ]]
   then
     unregister_maas_rack "$POD_SYSTEM_ID"
-    register_maas_rack "$HOST_SYTEM_ID"
+    if $?;
+    then
+      echo "Unregister of $POD_SYSTEM_ID failed, exitting."
+      exit 1
+    fi
+    register_maas_rack "$HOST_SYSTEM_ID"
   else
     echo "Found existing maas_id, assuming already registered."
   fi

images/maas-rack-controller/Dockerfile

@@ -19,7 +19,8 @@ RUN apt-get -qq update && \
     software-properties-common \
     libvirt-bin \
     systemd \
-    patch
+    patch \
+    jq
 # Don't start any optional services except for the few we need.
 
 RUN find /etc/systemd/system \

images/maas-rack-controller/scripts/register-rack-controller.service

@@ -5,7 +5,7 @@ After=network-online.target
 
 [Service]
 Type=oneshot
-PassEnvironment=MAAS_ENDPOINT MAAS_REGION_SECRET
+PassEnvironment=MAAS_ENDPOINT MAAS_REGION_SECRET MAAS_API_KEY HOST_MOUNT_PATH
 ExecStart=/usr/local/bin/register-rack-controller.sh
 
 [Install]