Class: DockerHost

Inherits:
Object
  • Object
show all
Extended by:
HTTPUtils
Defined in:
lib/panteras_api/docker_host.rb

Defined Under Namespace

Classes: MesosConsulCommandError

Class Method Summary collapse

Methods included from HTTPUtils

construct_uri, get_response_with_redirect, to_j, valid_url

Class Method Details

.command(command) ⇒ Object 



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# File 'lib/panteras_api/docker_host.rb', line 42

def self.command(command)
  output = []
  error = []
  begin
    Open3.popen3(command) do |stdin, stdout, stderr, wait_thr|
      
      exit_status = wait_thr.value
      
      unless exit_status.success?
        $stderr.puts stderr.readlines
        raise MesosConsulCommandError, "Command '#{command}' returned status #{exit_status.exitstatus}"          
      end
      
      while line = stderr.gets
        $stderr.puts line
        if line.strip.length > 0
          error << line.strip
        end
      end
      
      while line = stdout.gets
       if line.strip.length > 0          
         output << line.strip
       end
      end     
    
    end
    
  rescue Errno::ENOENT => e
    raise MesosConsulCommandError, "Error while running command #{command}: #{e.message}"
  end
    
  return { :output => output, :error => error}
     
end

.inspect(*keys) ⇒ Object 



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# File 'lib/panteras_api/docker_host.rb', line 23

def self.inspect(*keys)
  containers = self.running_containers
  containers.map do |c|
    inspect = self.command("docker inspect #{c[:container_id]}")[:output]
    h = to_j(inspect.join).first    
    task_id = h[:Config][:Env].select { |env| env =~ /MESOS_TASK_ID=/ }.first
    mesos_task_id = task_id.nil? ? '' : task_id.split(/=/)[1] 
    { id: h[:Id], image: h[:Image], name: h[:Name][1..-1], mesos_task_id: mesos_task_id }
  end
end

.inspect_partial ⇒ Object 



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# File 'lib/panteras_api/docker_host.rb', line 34

def self.inspect_partial
  self.inspect
end

.ps ⇒ Object 



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# File 'lib/panteras_api/docker_host.rb', line 6

def self.ps
  self.command("docker ps")[:output]
end

.running_containers ⇒ Object

Raises:



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# File 'lib/panteras_api/docker_host.rb', line 10

def self.running_containers
  output = self.command("docker ps")[:output]
  raise MesosConsulCommandError, "Command 'docker ps' did not return an array of strings" if (output.class != Array || output.length == 0)
  
  result = output.map.with_index do |line, i|
    next if i == 0 
    container_id, image, *center, name = line.split
    { container_id:  container_id, name: name, image: image }       
  end
  
  return result.compact
end