1 files changed, 60 insertions, 0 deletions
diff --git a/sysutils/py-google-compute-engine/files/google_set_hostname b/sysutils/py-google-compute-engine/files/google_set_hostname
new file mode 100644
index 000000000000..f0d50de9ef26
--- /dev/null
+++ b/sysutils/py-google-compute-engine/files/google_set_hostname
@@ -0,0 +1,60 @@
+#!/bin/sh
+# Copyright 2016 Google Inc. All Rights Reserved.
+#
+# 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.
+
+# Deal with a new hostname assignment.
+
+if [ -n "$new_host_name" ] && [ -n "$new_ip_address" ]; then
+  # Delete entries with new_host_name or new_ip_address in /etc/hosts.
+  sed -i "" '/Added by Google/d' /etc/hosts
+
+  # Add an entry for our new_host_name/new_ip_address in /etc/hosts.
+  echo "${new_ip_address} ${new_host_name} ${new_host_name%%.*}  # Added by Google" >> /etc/hosts
+
+  # Add an entry for reaching the metadata server in /etc/hosts.
+  echo "169.254.169.254 metadata.google.internal  # Added by Google" >> /etc/hosts
+fi
+
+# /sbin/dhclient-scripts in both ubuntu and centos have some problems for us:
+#  1) BOUND doesn't always set hostname (e.g. if old_host_name is unset in
+#     precise pangolin)
+#  2) Using too long of a FQDN as a hostname causes some tools to break in
+#     some distros (e.g. ssh-keygen) and hostname tool complains when given
+#     a FQDN that is > 64 bytes.
+#
+# As a result, we set the host name in all circumstances here, to the truncated
+# unqualified domain name.
+
+if [ -n "$new_host_name" ]; then
+  hostname "${new_host_name%%.*}"
+
+  # If NetworkManager is installed set the hostname with nmcli.
+  # to resolve issues with NetworkManager resetting the hostname
+  # to the FQDN on DHCP renew.
+  nmcli=$(which nmcli 2> /dev/null)
+  if [ -x "$nmcli" ]; then
+    nmcli general hostname "${new_host_name%%.*}"
+  fi
+
+  # Restart rsyslog to update the hostname.
+  systemctl=$(which systemctl 2> /dev/null)
+  if [ -x "$systemctl" ]; then
+    hasrsyslog=$($systemctl | grep rsyslog | cut -f1 -d' ')
+    if [ ! -z "$hasrsyslog" ]; then
+      $systemctl -q --no-block restart "$hasrsyslog"
+    fi
+  else
+    pkill -HUP syslogd
+  fi
+fi