Class: SmartMachine::Grids::Redis

Inherits:
Base
  • Object
show all
Defined in:
lib/smart_machine/grids/redis.rb

Instance Method Summary collapse

Methods inherited from Base

#machine_has_engine_installed?, #platform_on_machine?, #user_bash

Methods included from Logger

configure_logger_for, included, #logger, logger_for

Constructor Details

#initialize(name:) ⇒ Redis

Returns a new instance of Redis.



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# File 'lib/smart_machine/grids/redis.rb', line 4

def initialize(name:)
  config = SmartMachine.config.grids.redis.dig(name.to_sym)
  raise "redis config for #{name} not found." unless config

  @image = config.dig(:image)
  @port = config.dig(:port)
  @password = config.dig(:password)
  @appendonly = config.dig(:appendonly)
  @maxmemory = config.dig(:maxmemory)
  @maxmemory_policy = config.dig(:maxmemory_policy)
  if @image.start_with?("redislabs/redismod")
    @modules = config.dig(:modules)&.map { |module_name| "--loadmodule /usr/lib/redis/modules/#{module_name}.so" } || []
    @modules.push("Plugin /var/opt/redislabs/modules/rg/plugin/gears_python.so")
  else
    @modules = []
  end

  @name = name.to_s
  @home_dir = File.expand_path('~')
end

Instance Method Details

#downer ⇒ Object

Stopping & Removing containers - in reverse order



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# File 'lib/smart_machine/grids/redis.rb', line 63

def downer
  puts "-----> Stopping container #{@name} ... "
  if system("docker stop '#{@name}'", out: File::NULL)
    puts "done"
    puts "-----> Removing container #{@name} ... "
    if system("docker rm '#{@name}'", out: File::NULL)
      puts "done"
    end
  end

  # Removing networks
  puts "-----> Removing network #{@name}-network ... "
  if system("docker network rm #{@name}-network", out: File::NULL)
    puts "done"
  end
end

#uper ⇒ Object 



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# File 'lib/smart_machine/grids/redis.rb', line 25

def uper
  # Creating networks
  unless system("docker network inspect #{@name}-network", [:out, :err] => File::NULL)
    puts "-----> Creating network #{@name}-network ... "
    if system("docker network create #{@name}-network", out: File::NULL)
      puts "done"
    end
  end

  FileUtils.mkdir_p("#{@home_dir}/machine/grids/redis/#{@name}/data")

  # Creating & Starting containers
  puts "-----> Creating container #{@name} ... "

  command = [
    "docker create",
    "--name='#{@name}'",
    "--user `id -u`:`id -g`",
    "--publish='#{@port}:#{@port}'",
    "--volume='#{@home_dir}/smartmachine/grids/redis/#{@name}/data:/data'",
    "--restart='always'",
    "--network='#{@name}-network'",
    "#{@image} --port #{@port} --requirepass #{@password} --appendonly #{@appendonly} --maxmemory #{@maxmemory} --maxmemory-policy #{@maxmemory_policy} #{@modules.join(' ')}".squish
  ]
  if system(command.compact.join(" "), out: File::NULL)
    puts "done"
    puts "-----> Starting container #{@name} ... "
    if system("docker start #{@name}", out: File::NULL)
      puts "done"
    else
      raise "Error: Could not start the created #{@name} container"
    end
  else
    raise "Error: Could not create #{@name} container"
  end
end