Class: Seira::Cluster

Inherits:
Object
  • Object
show all
Defined in:
lib/seira/cluster.rb

Constant Summary collapse

VALID_ACTIONS = 
%w[help bootstrap upgrade].freeze
SUMMARY = 
"For managing whole clusters.".freeze

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(action:, args:, context:, settings:) ⇒ Cluster

Returns a new instance of Cluster.



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# File 'lib/seira/cluster.rb', line 13

def initialize(action:, args:, context:, settings:)
  @action = action
  @args = args
  @context = context
  @settings = settings
end

Instance Attribute Details

#action ⇒ Object (readonly)

Returns the value of attribute action.



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# File 'lib/seira/cluster.rb', line 11

def action
  @action
end

#args ⇒ Object (readonly)

Returns the value of attribute args.



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# File 'lib/seira/cluster.rb', line 11

def args
  @args
end

#context ⇒ Object (readonly)

Returns the value of attribute context.



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# File 'lib/seira/cluster.rb', line 11

def context
  @context
end

#settings ⇒ Object (readonly)

Returns the value of attribute settings.



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# File 'lib/seira/cluster.rb', line 11

def settings
  @settings
end

Class Method Details

.current_cluster ⇒ Object 



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# File 'lib/seira/cluster.rb', line 51

def self.current_cluster
  `kubectl config current-context`.chomp.strip
end

Instance Method Details

#current ⇒ Object 



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# File 'lib/seira/cluster.rb', line 55

def current
  puts `gcloud config get-value project`
  puts `kubectl config current-context`
end

#run ⇒ Object 



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# File 'lib/seira/cluster.rb', line 20

def run
  case action
  when 'help'
    run_help
  when 'bootstrap'
    run_bootstrap
  when 'upgrade'
    run_upgrade
  else
    fail "Unknown command encountered"
  end
end

#switch(target_cluster:, verbose: false) ⇒ Object 



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# File 'lib/seira/cluster.rb', line 33

def switch(target_cluster:, verbose: false)
  unless target_cluster && target_cluster != "" && settings.valid_cluster_names.include?(target_cluster)
    puts "Please specify environment as first param to any seira command"
    puts "Environment should be one of #{settings.valid_cluster_names}"
    exit(1)
  end

  # The context in kubectl are a bit more difficult to name. List by name only and search for the right one using a simple string match
  cluster_metadata = settings.clusters[target_cluster]

  puts("Switching to gcloud config of '#{target_cluster}' and kubernetes cluster of '#{cluster_metadata['cluster']}'") if verbose
  exit(1) unless system("gcloud config configurations activate #{target_cluster}")
  exit(1) unless system("kubectl config use-context #{cluster_metadata['cluster']}")

  # If we haven't exited by now, it was successful
  true
end