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# frozen_string_literal: true
module Clusters
module Platforms
class Kubernetes < ActiveRecord::Base
include Gitlab::Kubernetes
include ReactiveCaching
include EnumWithNil
include AfterCommitQueue
RESERVED_NAMESPACES = %w(gitlab-managed-apps).freeze
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: Settings.attr_encrypted_db_key_base_truncated,
algorithm: 'aes-256-cbc'
attr_encrypted :token,
mode: :per_attribute_iv,
key: Settings.attr_encrypted_db_key_base_truncated,
algorithm: 'aes-256-cbc'
before_validation :enforce_namespace_to_lower_case
before_validation :enforce_ca_whitespace_trimming
validates :namespace,
allow_blank: true,
length: 1..63,
format: {
with: Gitlab::Regex.kubernetes_namespace_regex,
message: Gitlab::Regex.kubernetes_namespace_regex_message
}
validates :namespace, exclusion: { in: RESERVED_NAMESPACES }
validate :no_namespace, unless: :allow_user_defined_namespace?
# 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!
after_update :update_kubernetes_namespace
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
delegate :allow_user_defined_namespace?, to: :cluster, allow_nil: true
delegate :kubernetes_namespace, to: :cluster
alias_method :active?, :enabled?
enum_with_nil authorization_type: {
unknown_authorization: nil,
rbac: 1,
abac: 2
}
def actual_namespace
if namespace.present?
namespace
else
default_namespace
end
end
def predefined_variables(project:)
Gitlab::Ci::Variables::Collection.new.tap do |variables|
variables.append(key: 'KUBE_URL', value: api_url)
if ca_pem.present?
variables
.append(key: 'KUBE_CA_PEM', value: ca_pem)
.append(key: 'KUBE_CA_PEM_FILE', value: ca_pem, file: true)
end
if kubernetes_namespace = cluster.kubernetes_namespaces.has_service_account_token.find_by(project: project)
variables.concat(kubernetes_namespace.predefined_variables)
else
# From 11.5, every Clusters::Project should have at least one
# Clusters::KubernetesNamespace, so once migration has been completed,
# this 'else' branch will be removed. For more information, please see
# https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/22433
config = YAML.dump(kubeconfig)
variables
.append(key: 'KUBE_URL', value: api_url)
.append(key: 'KUBE_TOKEN', value: token, public: false)
.append(key: 'KUBE_NAMESPACE', value: actual_namespace)
.append(key: 'KUBECONFIG', value: config, public: false, file: true)
end
end
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_kube_client!
end
private
def kubeconfig
to_kubeconfig(
url: api_url,
namespace: actual_namespace,
token: token,
ca_pem: ca_pem)
end
def default_namespace
kubernetes_namespace&.namespace.presence || fallback_default_namespace
end
# DEPRECATED
#
# On 11.4 Clusters::KubernetesNamespace was introduced, this model will allow to
# have multiple namespaces per project. This method will be removed after migration
# has been completed.
def fallback_default_namespace
return unless project
slug = "#{project.path}-#{project.id}".downcase
Gitlab::NamespaceSanitizer.sanitize(slug)
end
def build_kube_client!
raise "Incomplete settings" unless api_url
raise "No namespace" if cluster.project_type? && actual_namespace.empty? # can probably remove this line once we remove #actual_namespace
unless (username && password) || token
raise "Either username/password or token is required to access API"
end
Gitlab::Kubernetes::KubeClient.new(
api_url,
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_kube_client!
kubeclient.get_pods(namespace: actual_namespace).as_json
rescue Kubeclient::ResourceNotFoundError
[]
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 terminal_auth
{
token: token,
ca_pem: ca_pem,
max_session_time: Gitlab::CurrentSettings.terminal_max_session_time
}
end
def enforce_namespace_to_lower_case
self.namespace = self.namespace&.downcase
end
def enforce_ca_whitespace_trimming
self.ca_pem = self.ca_pem&.strip
self.token = self.token&.strip
end
def no_namespace
if namespace
errors.add(:namespace, 'only allowed for project cluster')
end
end
def prevent_modification
return unless managed?
if api_url_changed? || token_changed? || ca_pem_changed?
errors.add(:base, _('Cannot modify managed Kubernetes cluster'))
return false
end
true
end
def update_kubernetes_namespace
return unless namespace_changed?
run_after_commit do
ClusterPlatformConfigureWorker.perform_async(cluster_id)
end
end
end
end
end