Class: Kontena::Cli::Grids::HealthCommand

Inherits:
Kontena::Command show all
Includes:
Common, Common, Helpers::HealthHelper
Defined in:
lib/kontena/cli/grids/health_command.rb

Instance Attribute Summary

Attributes inherited from Kontena::Command

#arguments, #exit_code, #result

Instance Method Summary collapse

Methods included from Common

#calculate_filesystem_stats, #calculate_loads, #calculate_mem_used, #find_grid_by_name, #get_grid, #grids, #print_grid, #to_gigabytes

Methods included from Helpers::HealthHelper

#grid_health, #health_icon, #node_etcd_health, #node_health

Methods included from Common

#access_token=, #add_master, #any_key_to_continue, #any_key_to_continue_with_timeout, #api_url, #api_url=, #caret, #clear_current_grid, #client, #cloud_auth?, #cloud_client, #config, #confirm, #confirm_command, #current_grid, #current_master_index, #debug?, #display_account_login_info, #display_login_info, display_logo, #display_master_login_info, #error, exit_with_error, #kontena_account, #logger, #pastel, #print, #prompt, #puts, #require_api_url, #require_token, #reset_client, #reset_cloud_client, #running_quiet?, #running_silent?, #running_verbose?, #spin_if, #spinner, #sprint, #sputs, #stdin_input, #use_refresh_token, #vfakespinner, #vputs, #vspinner, #warning

Methods inherited from Kontena::Command

banner, callback_matcher, #help_requested?, inherited, #instance, load_subcommand, requires_current_account_token, requires_current_account_token?, requires_current_grid, requires_current_grid?, requires_current_master, requires_current_master?, requires_current_master_token, requires_current_master_token?, #run, #run_callbacks, #verify_current_account_token, #verify_current_grid, #verify_current_master, #verify_current_master_token

Instance Method Details

#execute ⇒ Object 



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# File 'lib/kontena/cli/grids/health_command.rb', line 12

def execute
  require_api_url

  grid = get_grid(name)
  grid_nodes = client(require_token).get("grids/#{grid['name']}/nodes")

  return show_grid_health(grid, grid_nodes['nodes'])
end

#show_grid_health(grid, nodes) ⇒ Boolean

Validate grid/nodes configuration for grid operation

Returns:

  • (Boolean) —

    false if unhealthy



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# File 'lib/kontena/cli/grids/health_command.rb', line 24

def show_grid_health(grid, nodes)
  initial_size = grid['initial_size']
  minimum_size = grid['initial_size'] / 2 + 1 # a majority is required for etcd quorum

  grid_health = grid_health(grid, nodes)
  initial_nodes = nodes.select{|node| node['initial_member']}
  online_nodes = initial_nodes.select{|node| node['connected']}

  # configuration and status
  if initial_nodes.length == 0
    puts "#{health_icon :error} Grid does not have any initial nodes, and requires at least #{minimum_size} of #{initial_size} initial nodes for operation"
  elsif online_nodes.empty?
    puts "#{health_icon :error} Grid does not have any initial nodes online, and requires at least #{minimum_size} of #{initial_size} initial nodes for operation"
  elsif initial_nodes.length < minimum_size
    puts "#{health_icon :error} Grid only has #{initial_nodes.length} initial nodes, and requires at least #{minimum_size} of #{initial_size} initial nodes for operation"
  elsif online_nodes.length < minimum_size
    puts "#{health_icon :error} Grid only has #{online_nodes.length} initial nodes online, and requires at least #{minimum_size} of #{initial_size} initial nodes for operation"
  elsif initial_nodes.length < initial_size
    puts "#{health_icon :warning} Grid only has #{initial_nodes.length} initial nodes of #{initial_size} required for high-availability"
  elsif online_nodes.length < initial_size
    puts "#{health_icon :warning} Grid only has #{online_nodes.length} initial nodes online of #{initial_size} required for high-availability"
  elsif initial_nodes.length == 2
    puts "#{health_icon :warning} Grid only has #{initial_nodes.length} initial nodes, and is not high-availability"
  elsif initial_nodes.length == 1
    puts "#{health_icon :warning} Grid only has #{initial_nodes.length} initial node, and is not high-availability"
  else
    puts "#{health_icon :ok} Grid has all #{online_nodes.length} of #{initial_size} initial nodes online"
  end

  nodes.each do |node|
    node_health = node_health(node, grid_health)

    if node['connected']

    elsif node['initial_member']
      puts "#{health_icon grid_health} Initial node #{node['name']} is offline"
    else
      puts "#{health_icon node_health} Grid node #{node['name']} is offline"
    end
  end

  # operational if we have etcd quorum
  return online_nodes.length >= minimum_size
end