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|
module Clusters
module Platforms
class Kubernetes < ActiveRecord::Base
include Gitlab::CurrentSettings
include Gitlab::Kubernetes
include ReactiveCaching
self.table_name = 'cluster_platforms_kubernetes'
self.reactive_cache_key = ->(kubernetes) { [kubernetes.class.model_name.singular, kubernetes.id] }
belongs_to :cluster, inverse_of: :platform_kubernetes, class_name: 'Clusters::Cluster'
attr_encrypted :password,
mode: :per_attribute_iv,
key: Gitlab::Application.secrets.db_key_base,
algorithm: 'aes-256-cbc'
attr_encrypted :token,
mode: :per_attribute_iv,
key: Gitlab::Application.secrets.db_key_base,
algorithm: 'aes-256-cbc'
before_validation :enforce_namespace_to_lower_case
validates :namespace,
allow_blank: true,
length: 1..63,
format: {
with: Gitlab::Regex.kubernetes_namespace_regex,
message: Gitlab::Regex.kubernetes_namespace_regex_message
}
# We expect to be `active?` only when enabled and cluster is created (the api_url is assigned)
validates :api_url, url: true, presence: true
validates :token, presence: true
validate :prevent_modification, on: :update
after_save :clear_reactive_cache!
alias_attribute :ca_pem, :ca_cert
delegate :project, to: :cluster, allow_nil: true
delegate :enabled?, to: :cluster, allow_nil: true
delegate :managed?, to: :cluster, allow_nil: true
alias_method :active?, :enabled?
def actual_namespace
if namespace.present?
namespace
else
default_namespace
end
end
def predefined_variables
config = YAML.dump(kubeconfig)
variables = [
{ key: 'KUBE_URL', value: api_url, public: true },
{ key: 'KUBE_TOKEN', value: token, public: false },
{ key: 'KUBE_NAMESPACE', value: actual_namespace, public: true },
{ key: 'KUBECONFIG', value: config, public: false, file: true }
]
if ca_pem.present?
variables << { key: 'KUBE_CA_PEM', value: ca_pem, public: true }
variables << { key: 'KUBE_CA_PEM_FILE', value: ca_pem, public: true, file: true }
end
variables
end
# Constructs a list of terminals from the reactive cache
#
# Returns nil if the cache is empty, in which case you should try again a
# short time later
def terminals(environment)
with_reactive_cache do |data|
pods = filter_by_label(data[:pods], app: environment.slug)
terminals = pods.flat_map { |pod| terminals_for_pod(api_url, actual_namespace, pod) }
terminals.each { |terminal| add_terminal_auth(terminal, terminal_auth) }
end
end
# Caches resources in the namespace so other calls don't need to block on
# network access
def calculate_reactive_cache
return unless enabled? && project && !project.pending_delete?
# We may want to cache extra things in the future
{ pods: read_pods }
end
def kubeclient
@kubeclient ||= build_kubeclient!
end
private
def kubeconfig
to_kubeconfig(
url: api_url,
namespace: actual_namespace,
token: token,
ca_pem: ca_pem)
end
def default_namespace
return unless project
slug = "#{project.path}-#{project.id}".downcase
slug.gsub(/[^-a-z0-9]/, '-').gsub(/^-+/, '')
end
def build_kubeclient!(api_path: 'api', api_version: 'v1')
raise "Incomplete settings" unless api_url && actual_namespace
unless (username && password) || token
raise "Either username/password or token is required to access API"
end
::Kubeclient::Client.new(
join_api_url(api_path),
api_version,
auth_options: kubeclient_auth_options,
ssl_options: kubeclient_ssl_options,
http_proxy_uri: ENV['http_proxy']
)
end
# Returns a hash of all pods in the namespace
def read_pods
kubeclient = build_kubeclient!
kubeclient.get_pods(namespace: actual_namespace).as_json
rescue KubeException => err
raise err unless err.error_code == 404
[]
end
def kubeclient_ssl_options
opts = { verify_ssl: OpenSSL::SSL::VERIFY_PEER }
if ca_pem.present?
opts[:cert_store] = OpenSSL::X509::Store.new
opts[:cert_store].add_cert(OpenSSL::X509::Certificate.new(ca_pem))
end
opts
end
def kubeclient_auth_options
{ bearer_token: token }
end
def join_api_url(api_path)
url = URI.parse(api_url)
prefix = url.path.sub(%r{/+\z}, '')
url.path = [prefix, api_path].join("/")
url.to_s
end
def terminal_auth
{
token: token,
ca_pem: ca_pem,
max_session_time: current_application_settings.terminal_max_session_time
}
end
def enforce_namespace_to_lower_case
self.namespace = self.namespace&.downcase
end
def prevent_modification
return unless managed?
if api_url_changed? || token_changed? || ca_pem_changed?
errors.add(:base, "cannot modify managed cluster")
return false
end
true
end
end
end
end
|
