Class: Exec::ServiceStart

Inherits:
ExecutableCommand show all
Defined in:
lib/exec/service_start.rb

Overview

Allows the user to start services.

Author:

  • tnoguer

Instance Attribute Summary

Attributes inherited from ExecutableCommand

#argv, #command_name, #logger, #options, #stderr, #stdin, #stdout, #values

Instance Method Summary collapse

Methods inherited from ExecutableCommand

#check_parameters, #create_logger, #initialize, #run

Constructor Details

This class inherits a constructor from Exec::ExecutableCommand

Instance Method Details

#exec ⇒ Object (private)

Execution of the command



39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
 
# File 'lib/exec/service_start.rb', line 39

def exec
  begin
    Color::print_log("NONE", "Checking dependencies...", @stdout)
    Common::ServicesDescription.get_master_components_deps(@values["service"]).each do |dep_master_component|
      dep_service_name = Common::ServicesDescription.get_service_name_by_comp_name(dep_master_component)
      data = Command::AmbariServiceComponentInfo.new(dep_service_name, @values["cluster"], dep_master_component).exec

      started = true
      data["host_components"].each do |host_component|
        started = false if host_component["HostRoles"]["state"] != "STARTED"
      end

      raise MissingDependency.new("Master component #{dep_master_component} has to be started before start #{@values["service"]} service.") unless started
    end
    Color::echo_ok(@stdout)

  rescue CloudboxError => e
    Color::echo_fail(@stdout)
    raise e
  end

  msg = "Unknown combination of attributes... (should never happend)"
  cmd = nil

  if (!@values["host"].nil? && !@values["component"].nil?) || (!@values["service"].nil? && !@values["host"].nil? && !@values["component"].nil?)
    # 3
    # one component on one host
    msg = "Start components #{@values["component"]} on host #{@values["host"]} (@cluster #{@values["cluster"]})."
    cmd = Command::AmbariStartHostComponent.new(@values["cluster"], @values["component"], @values["host"])

  elsif !@values["component"].nil? || (!@values["service"].nil? && !@values["component"].nil?)
    # 1
    # one component on all hosts
    msg = "Start all components (@cluster #{@values["cluster"]})."
    cmd = Command::AmbariStartComponent.new(@values["cluster"], @values["component"])

  elsif !@values["service"].nil? && !@values["host"].nil?
    # 5
    # all component on one host for one service
    # @todo it is the same case than number 3
    msg = "Start components #{@values["component"]} of service #{@values["service"]} on host #{@values["host"]} (@cluster #{@values["cluster"]})."
    cmd = Command::AmbariStartHostComponents.new(@values["cluster"], @values["service"], @values["host"])

  elsif !@values["host"].nil?
    # 2
    # all component on one host
    msg = "Start all components on host #{@values["host"]} (@cluster #{@values["cluster"]})."
    cmd = Command::AmbariStartHost.new(@values["cluster"], @values["host"])

  elsif !@values["service"].nil?
    # 4
    # all component on all hosts for one service
    msg = "Start all components #{@values["component"]} of service #{@values["service"]} on all hosts (@cluster #{@values["cluster"]})."
    cmd = Command::AmbariStartServiceComponents.new(@values["cluster"], @values["service"])

  elsif @values["service"].nil? && @values["host"].nil? && @values["component"].nil?
    # 6
    # all component on all host for all service
    msg = "Start all components of all services on all hosts (@cluster #{@values["cluster"]})."
    cmd = Command::AmbariStartCluster.new(@values["cluster"])

  else
    raise StandardError(msg)
  end

  Color::print_log("NONE", msg, @stdout)
  cmd.exec()
  Color::echo_ok(@stdout)
end

#set_options ⇒ Object (private)

Parse and check the parameters of the function.

Author:

  • tmarmin



28
29
30
31
32
33
34
35
 
# File 'lib/exec/service_start.rb', line 28

def set_options
  @logger.info("setting options")
  @options.add_option("C", "cluster", "The virtual cluster name.", true, true, method(:check_cluster_name))
  @options.add_option("s", "service", "Limit request to this service.", false, true, method(:check_hadoop_service_name))
  @options.add_option("H", "host", "Limit request to this host.", false, true, method(:check_ambari_host_name))
  @options.add_option("c", "component", "Limit request to this component type.", false, true, method(:check_hadoop_component_name))
  @options.add_option("f", "follow", "Follow completion of the request.", false)
end