1) Right after the service definition in the default recipe (e.g. apache2::default), create a semaphore file that forces the service to stop if this file doesn't exist (it shouldn't):
file "/tmp/gather-apache2-semaphore" do
mode 00644
owner "root"
group "root"
action :create
content "must stop apache"
notifies :stop, resources(:service => "apache2"), :immediately
end
2) Make sure your application deploy recipe notifies a restart of the service (e.g. apache2::example_app_config):
ruby_block "copy_httpd.conf" do
block do
FileUtils.copy_file("#{deploy_directory}/example_app/build_out/dist/conf/httpd.conf","/etc/apache2/httpd.conf")
end
notifies :restart, resources(:service => "apache2")
end
and/or if you are calling this from another recipe (e.g. example_app::deploy):
include_recipe "apache2"
bash "copy_example_app_htdocs.tar" do
user "root"
cwd "#{deploy_directory}/example_app/build_out/dist"
code <<-EOH
tar --extract --file=example_app_htdocs.tar --directory /etc/apache2/htdocs
EOH
only_if { ::File.exists?("/etc/apache2/htdocs") }
notifies :restart, resources(:service => "apache2")
end
3) Finally, after all the key recipes have been run to deploy your unique snowflake, the service will have been restarted and you can clean-up your semaphore that will force the service to be restarted next time you deploy.
file "/tmp/gather-apache2-semaphore" do
action :delete
end
Now the service will be guaranteed to be stopped while your application deploying.
