Module: MovableInk::AWS::ElastiCache

Included in:
MovableInk::AWS
Defined in:
lib/movable_ink/aws/elasticache.rb

Instance Method Summary collapse

Instance Method Details

#all_elasticache_replicas(name) ⇒ Object 



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# File 'lib/movable_ink/aws/elasticache.rb', line 43

def all_elasticache_replicas(name)
  elasticache_replicas(name)
    .map { |replica| replica.read_endpoint.address }
end

#elasticache(region: my_region) ⇒ Object 



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# File 'lib/movable_ink/aws/elasticache.rb', line 4

def elasticache(region: my_region)
  @elasticache_client ||= {}
  @elasticache_client[region] ||= Aws::ElastiCache::Client.new(region: region)
end

#elasticache_primary(name) ⇒ Object 



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# File 'lib/movable_ink/aws/elasticache.rb', line 18

def elasticache_primary(name)
  replication_group(name)
    .node_groups
    .first
    .primary_endpoint
    .address
end

#elasticache_replica_in_my_az(name) ⇒ Object 



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# File 'lib/movable_ink/aws/elasticache.rb', line 48

def elasticache_replica_in_my_az(name)
  members = node_group_members_in_my_az(name)
  begin
    members
      .select{|ng| ng.current_role == 'replica'}
      .first
      .read_endpoint
      .address
  rescue NoMethodError
    members
      .first
      .read_endpoint
      .address
  end
end

#elasticache_replicas(name) ⇒ Object 



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# File 'lib/movable_ink/aws/elasticache.rb', line 38

def elasticache_replicas(name)
  node_group_members(name)
    .select { |ng| ng.current_role == 'replica' }
end

#node_group_members(name) ⇒ Object 



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# File 'lib/movable_ink/aws/elasticache.rb', line 26

def node_group_members(name)
  replication_group(name)
    .node_groups
    .first
    .node_group_members
end

#node_group_members_in_my_az(name) ⇒ Object 



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# File 'lib/movable_ink/aws/elasticache.rb', line 33

def node_group_members_in_my_az(name)
  node_group_members(name)
    .select { |ng| ng.preferred_availability_zone == availability_zone }
end

#replication_group(name) ⇒ Object 



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# File 'lib/movable_ink/aws/elasticache.rb', line 9

def replication_group(name)
  run_with_backoff do
    @replication_group ||= elasticache
      .describe_replication_groups(replication_group_id: name)
      .replication_groups
      .first
  end
end