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Chef mysql master/slave recipes
## mysql::master
ruby_block "store_mysql_master_status" do
block do
node.set[:mysql][:master] = true
m = Mysql.new("localhost", "root", node[:mysql][:server_root_password])
m.query("show master status") do |row|
row.each_hash do |h|
node.set[:mysql][:master_file] = h['File']
node.set[:mysql][:master_position] = h['Position']
end
end
Chef::Log.info "Storing database master replication status: #{node[:mysql][:master_file]} #{node[:mysql][:master_position]}"
node.save
end
# only execute if mysql is running
only_if "pgrep 'mysqld$'"
# subscribe to mysql service to catch restarts
subscribes :create, resources(:service => "mysql")
end
## mysql::slave
ruby_block "start_replication" do
block do
dbmasters = search(:node, "mysql_master:true AND mysql_cluster_name:#{node[:mysql][:cluster_name]}")
if dbmasters.size != 1
Chef::Log.error("#{dbmasters.size} database masters, cannot set up replication!")
else
dbmaster = dbmasters.first
Chef::Log.info("Using #{dbmaster.name} as master")
m = Mysql.new("localhost", "root", node[:mysql][:server_root_password])
command = %Q{
CHANGE MASTER TO
MASTER_HOST="#{dbmaster.mysql.bind_address}",
MASTER_USER="repl",
MASTER_PASSWORD="#{dbmaster.mysql.server_repl_password}",
MASTER_LOG_FILE="#{dbmaster.mysql.master_file}",
MASTER_LOG_POS=#{dbmaster.mysql.master_position};
}
Chef::Log.info "Sending start replication command to mysql: "
Chef::Log.info "#{command}"
m.query("stop slave")
m.query(command)
m.query("start slave")
end
end
not_if do
#TODO this fails if mysql is not running - check first
m = Mysql.new("localhost", "root", node[:mysql][:server_root_password])
slave_sql_running = ""
m.query("show slave status") {|r| r.each_hash {|h| slave_sql_running = h['Slave_SQL_Running'] } }
slave_sql_running == "Yes"
end
end
@fred

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fred commented Apr 3, 2013

nice recipe...
you're using the ruby mysql gem right?
I will try to modify it for a Chef-solo project..

@askz

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askz commented Dec 18, 2018

Hey @fred did you managed to do it ? (the chef solo recipe)

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