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# frozen_string_literal: true
module Clusters
module Kubernetes
class FetchKubernetesTokenService
DEFAULT_TOKEN_RETRY_DELAY = 5.seconds
TOKEN_RETRY_LIMIT = 5
attr_reader :kubeclient, :service_account_token_name, :namespace
def initialize(kubeclient, service_account_token_name, namespace, token_retry_delay: DEFAULT_TOKEN_RETRY_DELAY)
@kubeclient = kubeclient
@service_account_token_name = service_account_token_name
@namespace = namespace
@token_retry_delay = token_retry_delay
end
def execute
# Kubernetes will create the Secret and set the token asynchronously
# so it is necessary to retry
# https://kubernetes.io/docs/reference/access-authn-authz/service-accounts-admin/#token-controller
TOKEN_RETRY_LIMIT.times do
token_base64 = get_secret&.dig('data', 'token')
return Base64.decode64(token_base64) if token_base64
sleep @token_retry_delay
end
nil
end
private
def get_secret
kubeclient.get_secret(service_account_token_name, namespace).as_json
rescue Kubeclient::ResourceNotFoundError
end
end
end
end
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