chef/cookbooks/redisio/providers/configure.rb

action :run do
  base_piddir = new_resource.base_piddir

  if !new_resource.version
    redis_output = Mixlib::ShellOut.new("#{node['redisio']['bin_path']}/redis-server -v")
    redis_output.run_command
    redis_output.error!
    current_version = redis_output.stdout.gsub(/.*v=((\d+\.){2}\d+).*/, '\1').chomp
  else
    current_version = new_resource.version
  end
  version_hash = RedisioHelper.version_to_hash(current_version)

  # Setup a configuration file and init script for each configuration provided
  new_resource.servers.each do |current_instance|
    # Retrieve the default settings hash and the current server setups settings hash.
    current_instance_hash = current_instance.to_hash
    current_defaults_hash = new_resource.default_settings.to_hash

    # Merge the configuration defaults with the provided array of configurations provided
    current = current_defaults_hash.merge(current_instance_hash)

    # Merge in the default maxmemory
    node_memory_kb = node['memory']['total']
    # On BSD platforms Ohai reports total memory as a Fixnum

    node_memory_kb = node_memory_kb.sub('kB', '').to_i if node_memory_kb.is_a?(String)

    # Here we determine what the logfile is. It has these possible states
    #
    # Redis 2.6 and lower can be
    #   stdout
    #   A path
    #   nil
    # Redis 2.8 and higher can be
    #   empty string, which means stdout)
    #   A path
    #   nil

    if current['logfile'].nil?
      log_file = nil
      log_directory = nil
    elsif current['logfile'] == 'stdout' || current['logfile'].empty?
      log_directory = nil
      log_file = current['logfile']
    else
      log_directory = ::File.dirname(current['logfile'])
      log_file      = ::File.basename(current['logfile'])
      if current['syslogenabled'] == 'yes'
        Chef::Log.warn("log file is set to #{current['logfile']} but syslogenabled is also set to 'yes'")
      end
    end

    maxmemory = current['maxmemory'].to_s
    if !maxmemory.empty? && maxmemory.include?('%')
      # Just assume this is sensible like "95%" or "95 %"
      percent_factor = current['maxmemory'].to_f / 100.0
      # Ohai reports memory in KB as it looks in /proc/meminfo
      maxmemory = (node_memory_kb * 1024 * percent_factor / new_resource.servers.length).round.to_s
    end

    descriptors = if current['ulimit'] == 0
                    current['maxclients'] + 32
                  elsif current['ulimit'] > current['maxclients']
                    current['ulimit']
                  else
                    current['maxclients']
                  end

    server_name = current['name'] || current['port']
    piddir = "#{base_piddir}/#{server_name}"
    aof_file = current['appendfilename'] || "#{current['datadir']}/appendonly-#{server_name}.aof"
    rdb_file = current['dbfilename'] || "#{current['datadir']}/dump-#{server_name}.rdb"

    # Create the owner of the redis data directory
    user current['user'] do
      comment 'Redis service account'
      manage_home true
      home current['homedir']
      shell current['shell']
      system current['systemuser']
      uid current['uid'] unless current['uid'].nil?
    end

    # Create the redis configuration directory
    directory current['configdir'] do
      owner 'root'
      group platform_family?('freebsd') ? 'wheel' : 'redis'
      mode '0775'
      recursive true
      action :create
    end
    # Create the instance data directory
    directory current['datadir'] do
      owner current['user']
      group current['group']
      mode '0775'
      recursive true
      action :create
    end
    # Create the pid file directory
    directory piddir do
      owner current['user']
      group current['group']
      mode '0755'
      recursive true
      action :create
    end
    # Create the log directory if syslog is not being used
    if log_directory
      directory log_directory do
        owner current['user']
        group current['group']
        mode '0755'
        recursive true
        action :create
      end
    end
    # Configure SELinux if it is enabled
    extend Chef::Util::Selinux

    if selinux_enabled?
      selinux_install 'install'

      selinux_fcontext "#{current['configdir']}(/.*)?" do
        secontext 'redis_conf_t'
      end
      selinux_fcontext "#{current['datadir']}(/.*)?" do
        secontext 'redis_var_lib_t'
      end
      selinux_fcontext "#{piddir}(/.*)?" do
        secontext 'redis_var_run_t'
      end
      if log_directory
        selinux_fcontext "#{log_directory}(/.*)?" do
          secontext 'redis_log_t'
        end
      end
    end
    # Create the log file if syslog is not being used
    if log_file
      file current['logfile'] do
        owner current['user']
        group current['group']
        mode '0644'
        backup false
        action :create
        # in version 2.8 or higher the empty string is used instead of stdout
        only_if { !log_file.empty? && log_file != 'stdout' }
      end
    end
    # Set proper permissions on the AOF or RDB files
    file aof_file do
      owner current['user']
      group current['group']
      mode '0644'
      only_if { current['backuptype'] == 'aof' || current['backuptype'] == 'both' }
      only_if { ::File.exist?(aof_file) }
    end
    file rdb_file do
      owner current['user']
      group current['group']
      mode '0644'
      only_if { current['backuptype'] == 'rdb' || current['backuptype'] == 'both' }
      only_if { ::File.exist?(rdb_file) }
    end

    # Setup the redis users descriptor limits
    # Pending response on https://github.com/brianbianco/redisio/commit/4ee9aad3b53029cc3b6c6cf741f5126755e712cd#diff-8ae42a59a6f4e8dc5b4e6dd2d6a34eab
    # TODO: ulimit cookbook v0.1.2 doesn't work with freeBSD
    if current['ulimit'] && !platform_family?('freebsd')
      user_ulimit current['user'] do
        filehandle_limit descriptors
      end
    end

    computed_save = current['save']
    if current['save'] && current['save'].respond_to?(:each_line)
      computed_save = current['save'].each_line
      Chef::Log.warn("#{server_name}: given a save argument as a string, instead of an array.")
      Chef::Log.warn("#{server_name}: This will be deprecated in future versions of the redisio cookbook.")
    end

    # Load password for use with requirepass from data bag if needed
    if current['data_bag_name'] && current['data_bag_item'] && current['data_bag_key']
      bag = data_bag_item(current['data_bag_name'], current['data_bag_item'])
      current['requirepass'] = bag[current['data_bag_key']]
      current['masterauth'] = bag[current['data_bag_key']]
    end

    # Lay down the configuration files for the current instance
    template "#{current['configdir']}/#{server_name}.conf" do
      source node['redisio']['redis_config']['template_source']
      cookbook node['redisio']['redis_config']['template_cookbook']
      owner current['user']
      group current['group']
      mode current['permissions']
      action :create
      variables(
        version:                    version_hash,
        piddir:                     piddir,
        name:                       server_name,
        job_control:                node['redisio']['job_control'],
        port:                       current['port'],
        tcpbacklog:                 current['tcpbacklog'],
        address:                    current['address'],
        databases:                  current['databases'],
        backuptype:                 current['backuptype'],
        datadir:                    current['datadir'],
        unixsocket:                 current['unixsocket'],
        unixsocketperm:             current['unixsocketperm'],
        timeout:                    current['timeout'],
        keepalive:                  current['keepalive'],
        loglevel:                   current['loglevel'],
        logfile:                    current['logfile'],
        syslogenabled:              current['syslogenabled'],
        syslogfacility:             current['syslogfacility'],
        save:                       computed_save,
        stopwritesonbgsaveerror:    current['stopwritesonbgsaveerror'],
        rdbcompression:             current['rdbcompression'],
        rdbchecksum:                current['rdbchecksum'],
        dbfilename:                 current['dbfilename'],
        slaveof:                    current['slaveof'],
        protected_mode:             current['protected_mode'],
        masterauth:                 current['masterauth'],
        slaveservestaledata:        current['slaveservestaledata'],
        slavereadonly:              current['slavereadonly'],
        replpingslaveperiod:        current['replpingslaveperiod'],
        repltimeout:                current['repltimeout'],
        repldisabletcpnodelay:      current['repldisabletcpnodelay'],
        replbacklogsize:            current['replbacklogsize'],
        replbacklogttl:             current['replbacklogttl'],
        slavepriority:              current['slavepriority'],
        requirepass:                current['requirepass'],
        rename_commands:            current['rename_commands'],
        maxclients:                 current['maxclients'],
        maxmemory:                  maxmemory,
        maxmemorypolicy:            current['maxmemorypolicy'],
        maxmemorysamples:           current['maxmemorysamples'],
        appendfilename:             current['appendfilename'],
        appendfsync:                current['appendfsync'],
        noappendfsynconrewrite:     current['noappendfsynconrewrite'],
        aofrewritepercentage:       current['aofrewritepercentage'],
        aofrewriteminsize:          current['aofrewriteminsize'],
        aofloadtruncated:           current['aofloadtruncated'],
        luatimelimit:               current['luatimelimit'],
        slowloglogslowerthan:       current['slowloglogslowerthan'],
        slowlogmaxlen:              current['slowlogmaxlen'],
        notifykeyspaceevents:       current['notifykeyspaceevents'],
        hashmaxziplistentries:      current['hashmaxziplistentries'],
        hashmaxziplistvalue:        current['hashmaxziplistvalue'],
        listmaxziplistentries:      current['listmaxziplistentries'],
        listmaxziplistvalue:        current['listmaxziplistvalue'],
        setmaxintsetentries:        current['setmaxintsetentries'],
        zsetmaxziplistentries:      current['zsetmaxziplistentries'],
        zsetmaxziplistvalue:        current['zsetmaxziplistvalue'],
        hllsparsemaxbytes:          current['hllsparsemaxbytes'],
        activerehasing:             current['activerehasing'],
        clientoutputbufferlimit:    current['clientoutputbufferlimit'],
        hz:                         current['hz'],
        aofrewriteincrementalfsync: current['aofrewriteincrementalfsync'],
        clusterenabled:             current['clusterenabled'],
        clusterconfigfile:          current['clusterconfigfile'],
        clusternodetimeout:         current['clusternodetimeout'],
        includes:                   current['includes'],
        minslavestowrite:           current['minslavestowrite'],
        minslavesmaxlag:            current['minslavesmaxlag'],
        repldisklesssync:           current['repldisklesssync'],
        repldisklesssyncdelay:      current['repldisklesssyncdelay']
      )
      not_if { ::File.exist?("#{current['configdir']}/#{server_name}.conf.breadcrumb") }
    end

    file "#{current['configdir']}/#{server_name}.conf.breadcrumb" do
      content 'This file prevents the chef cookbook from overwritting the redis config more than once'
      action :create_if_missing
      only_if { current['breadcrumb'] == true }
    end

    # Setup init.d file
    bin_path = if node['redisio']['install_dir']
                 ::File.join(node['redisio']['install_dir'], 'bin')
               else
                 node['redisio']['bin_path']
               end

    case node['redisio']['job_control']
    when 'initd'
      template "/etc/init.d/redis#{server_name}" do
        source 'redis.init.erb'
        cookbook 'redisio'
        owner 'root'
        group 'root'
        mode '0755'
        variables(
          name:           server_name,
          bin_path:       bin_path,
          port:           current['port'],
          address:        current['address'],
          user:           current['user'],
          configdir:      current['configdir'],
          piddir:         piddir,
          requirepass:    current['requirepass'],
          shutdown_save:  current['shutdown_save'],
          platform:       node['platform'],
          unixsocket:     current['unixsocket'],
          ulimit:         descriptors,
          required_start: node['redisio']['init.d']['required_start'].join(' '),
          required_stop:  node['redisio']['init.d']['required_stop'].join(' ')
        )
      end
    when 'upstart'
      template "/etc/init/redis#{server_name}.conf" do
        source 'redis.upstart.conf.erb'
        cookbook 'redisio'
        owner current['user']
        group current['group']
        mode '0644'
        variables(
          name:      server_name,
          bin_path:  bin_path,
          port:      current['port'],
          user:      current['user'],
          group:     current['group'],
          configdir: current['configdir'],
          piddir:    piddir
        )
      end
    when 'rcinit'
      template "/usr/local/etc/rc.d/redis#{server_name}" do
        source 'redis.rcinit.erb'
        cookbook 'redisio'
        owner current['user']
        group current['group']
        mode '0755'
        variables(
          name:      server_name,
          bin_path:  bin_path,
          user:      current['user'],
          configdir: current['configdir'],
          piddir:    piddir
        )
      end
    when 'systemd'
      service_name = "redis@#{server_name}"
      reload_name = "#{service_name} systemd reload"

      file "/etc/tmpfiles.d/#{service_name}.conf" do
        content "d #{piddir} 0755 #{current['user']} #{current['group']}\n"
        owner 'root'
        group 'root'
        mode '0644'
      end

      execute reload_name do
        command 'systemctl daemon-reload'
        action :nothing
      end

      template "/lib/systemd/system/#{service_name}.service" do
        source 'redis@.service.erb'
        cookbook 'redisio'
        owner 'root'
        group 'root'
        mode '0644'
        variables(
          bin_path:     bin_path,
          user:         current['user'],
          group:        current['group'],
          limit_nofile: descriptors
        )
        notifies :run, "execute[#{reload_name}]", :immediately
      end
    end
  end
  # servers each loop
end