Create "legacy" script path

This updates all the init scripts that call glean and expect it to
iterate the network interfaces to call a "glean-legacy.sh" script.

This is opposed to the udev path; where glean gets called for each
interface activated by the kernel.  Follow-on changes will modify this
path to do less work for each invocation.

Change-Id: I789890b3d55838f3b70c65e519991fed0eb74e6e

glean/init/glean-legacy.sh

@@ -0,0 +1,57 @@
+#!/bin/bash
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+# implied.
+#
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# dib-lint: disable=dibdebugtrace
+set -eu
+set -o pipefail
+
+PATH=/usr/local/bin:/bin:/sbin:/usr/bin:/usr/sbin
+
+# python-glean is installed alongside us and runs glean (the python
+# tool that actually does stuff).
+_GLEAN_PATH=$(dirname "$0")
+
+# NOTE(mnaser): Depending on the cloud, it may have `vfat` config drive which
+#               comes with a capitalized label rather than all lowercase.
+CONFIG_DRIVE_LABEL=""
+
+if blkid -t LABEL="config-2" ; then
+    CONFIG_DRIVE_LABEL="config-2"
+elif blkid -t LABEL="CONFIG-2" ; then
+    CONFIG_DRIVE_LABEL="CONFIG-2"
+fi
+
+# If the config drive exists we update the ssh keys, hostname and network
+# interfaces. Otherwise we only update network interfaces with a dhcp
+# fallback.
+#
+# Note we want to run as few glean processes as possible to cut down on
+# runtime in resource constrained environments.
+if [ -n "$CONFIG_DRIVE_LABEL" ]; then
+    # Mount config drive
+    mkdir -p /mnt/config
+    BLOCKDEV="$(blkid -L ${CONFIG_DRIVE_LABEL})"
+    TYPE="$(blkid -t LABEL=${CONFIG_DRIVE_LABEL} -s TYPE -o value)"
+    if [[ "${TYPE}" == 'vfat' ]]; then
+        mount -t vfat -o umask=0077 "${BLOCKDEV}" /mnt/config || true
+    elif [[ "${TYPE}" == 'iso9660' ]]; then
+        mount -t iso9660 -o ro,mode=0700 "${BLOCKDEV}" /mnt/config || true
+    else
+        mount -o mode=0700 "${BLOCKDEV}" /mnt/config || true
+    fi
+    $_GLEAN_PATH/python-glean --ssh --hostname $@
+else
+    $_GLEAN_PATH/python-glean $@
+fi

glean/init/glean.conf

@@ -11,4 +11,4 @@ start on starting networking
 
 task
 
-exec %%GLEANSH_PATH%%/glean.sh %%EXTRA_ARGS%%
+exec %%GLEANSH_PATH%%/glean-legacy.sh %%EXTRA_ARGS%%

glean/init/glean.init

@@ -12,7 +12,7 @@
 
 NAME=glean
 INIT_NAME=/etc/init.d/${NAME}
-SCRIPT_NAME=%%GLEANSH_PATH%%/${NAME}.sh
+SCRIPT_NAME=%%GLEANSH_PATH%%/glean-legacy.sh
 
 [ -x $SCRIPT_NAME ] || exit 0
 

glean/init/glean.openrc

@@ -5,7 +5,7 @@
 description="basic instance setup"
 
 start() {
-  %%GLEANSH_PATH%%/glean.sh
+  %%GLEANSH_PATH%%/glean-legacy.sh
   eend 0
 }