crowbar/crowbar-hadoop

#
# Cookbook Name: hadoop_infrastructure
# Recipe: cm-ha-filer-export.rb
#
# Copyright (c) 2011 Dell Inc.
#
# 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.
#

#######################################################################
# Begin recipe
#######################################################################
debug = node[:hadoop_infrastructure][:debug]
Chef::Log.info("HI - BEGIN hadoop_infrastructure:cm-ha-filer-export") if debug

#----------------------------------------------------------------------
# Configuration filter for the crowbar environment and local variables.
#----------------------------------------------------------------------
env_filter = " AND environment:#{node[:hadoop_infrastructure][:config][:environment]}"

admin_subnet = node[:network][:networks][:admin][:subnet]
admin_netmask = node[:network][:networks][:admin][:netmask]
shared_edits_directory = node[:hadoop_infrastructure][:ha][:shared_edits_directory]
shared_edits_export_options = node[:hadoop_infrastructure][:ha][:shared_edits_export_options]

# Install the nfs utils package.
nfs_packages=%w{
   nfs-utils
  }

nfs_packages.each do |pkg|
  package pkg do
    action :install
  end
end

#----------------------------------------------------------------------
# Create the directory for the HA filer export point if not already present.
# Note: The chef directory code block will fail if the directory is already exported.
# The File.exists?() check protects us against this condition.
#----------------------------------------------------------------------
if not File.exists?(shared_edits_directory)
  Chef::Log.info("HI - Creating HA export directory [#{shared_edits_directory}]") if debug
  directory shared_edits_directory do
    owner "hdfs"
    group "hadoop"
    mode "0700"
    recursive true
  end
else
  Chef::Log.info("HI - HA export directory already exists [#{shared_edits_directory}]") if debug
end

#----------------------------------------------------------------------
# Ensure that rpcbind is running for the HA filer mount point export.
# /etc/init.d/rpcbind {start|stop|status|restart|reload|force-reload|condrestart|try-restart}
#----------------------------------------------------------------------
service "rpcbind" do
  supports start: true, stop: true, status: true, restart: true
  action [:enable, :start]
end

#----------------------------------------------------------------------
# Ensure that NFS is running for the HA filer file mount point export.
# nfs {start|stop|status|restart|reload|force-reload|condrestart|try-restart|condstop}
#----------------------------------------------------------------------
service "nfs" do
  supports start: true, stop: true, status: true, restart: true
  action [:enable, :start]
end

# Ensure that the HA filer file system is exported.
execute "hadoop-ha-nfs-export" do
  command "exportfs -a"
  action :nothing
end

#----------------------------------------------------------------------
# Add the file system exports line if not ready there.
#----------------------------------------------------------------------
exports_file = "/etc/exports"
file exports_file do
  new_lines = "#{shared_edits_directory} #{admin_subnet}/#{admin_netmask}(#{shared_edits_export_options})"
  Chef::Log.info("HI - exportfs check [#{new_lines}]") if debug

  # Get current content, check for duplication
  only_if do
    current_content = File.read(exports_file)
    current_content.index(shared_edits_directory).nil?
  end

  # Set up the file and content.
  owner "root"
  group "root"
  mode "0644"
  current_content = File.read(exports_file)
  new_content = current_content + new_lines
  content "#{new_content}\n"
  notifies :run, "execute[hadoop-ha-nfs-export]", :delayed
end

#######################################################################
# End recipe
#######################################################################
Chef::Log.info("HI - END hadoop_infrastructure:cm-ha-filer-export") if debug