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kubernetes_master.py
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kubernetes_master.py
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#!/usr/bin/env python
# Copyright 2015 The Kubernetes Authors.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import base64
import csv
import os
import re
import random
import shutil
import socket
import string
import json
import ipaddress
import traceback
import yaml
from charms.leadership import leader_get, leader_set
from shutil import move, copyfile
from pathlib import Path
from subprocess import check_call
from subprocess import check_output
from subprocess import CalledProcessError
from urllib.request import Request, urlopen
from charms.layer import snap
from charms.reactive import hook
from charms.reactive import remove_state, clear_flag
from charms.reactive import set_state, set_flag
from charms.reactive import is_state, is_flag_set
from charms.reactive import endpoint_from_flag
from charms.reactive import when, when_any, when_not, when_none
from charms.reactive.helpers import data_changed, any_file_changed
from charms.layer import tls_client
from charms.layer import vaultlocker
from charms.layer import vault_kv
from charmhelpers.core import hookenv
from charmhelpers.core import host
from charmhelpers.core import unitdata
from charmhelpers.core.host import service_stop, service_resume
from charmhelpers.core.templating import render
from charmhelpers.contrib.charmsupport import nrpe
from charms.layer.hacluster import add_service_to_hacluster
from charms.layer.hacluster import remove_service_from_hacluster
from charms.layer.kubernetes_common import kubeclientconfig_path
from charms.layer.kubernetes_common import migrate_resource_checksums
from charms.layer.kubernetes_common import check_resources_for_upgrade_needed
from charms.layer.kubernetes_common import calculate_and_store_resource_checksums # noqa
from charms.layer.kubernetes_common import arch
from charms.layer.kubernetes_common import service_restart
from charms.layer.kubernetes_common import get_ingress_address
from charms.layer.kubernetes_common import create_kubeconfig
from charms.layer.kubernetes_common import get_service_ip
from charms.layer.kubernetes_common import configure_kubernetes_service
from charms.layer.kubernetes_common import cloud_config_path
from charms.layer.kubernetes_common import encryption_config_path
from charms.layer.kubernetes_common import write_gcp_snap_config
from charms.layer.kubernetes_common import write_openstack_snap_config
from charms.layer.kubernetes_common import write_azure_snap_config
from charms.layer.kubernetes_common import configure_kube_proxy
from charms.layer.kubernetes_common import kubeproxyconfig_path
from charms.layer.kubernetes_common import kubectl_manifest
from charms.layer.kubernetes_common import get_version
from charms.layer.kubernetes_common import retry
from charms.layer.kubernetes_common import ca_crt_path
from charms.layer.kubernetes_common import server_crt_path
from charms.layer.kubernetes_common import server_key_path
from charms.layer.kubernetes_common import client_crt_path
from charms.layer.kubernetes_common import client_key_path
from charms.layer.kubernetes_common import get_unit_number
from charms.layer.kubernetes_common import kubectl
# Override the default nagios shortname regex to allow periods, which we
# need because our bin names contain them (e.g. 'snap.foo.daemon'). The
# default regex in charmhelpers doesn't allow periods, but nagios itself does.
nrpe.Check.shortname_re = r'[\.A-Za-z0-9-_]+$'
snap_resources = ['kubectl', 'kube-apiserver', 'kube-controller-manager',
'kube-scheduler', 'cdk-addons', 'kube-proxy']
master_services = ['kube-apiserver',
'kube-controller-manager',
'kube-scheduler',
'kube-proxy']
os.environ['PATH'] += os.pathsep + os.path.join(os.sep, 'snap', 'bin')
db = unitdata.kv()
checksum_prefix = 'kubernetes-master.resource-checksums.'
configure_prefix = 'kubernetes-master.prev_args.'
keystone_root = '/root/cdk/keystone'
def set_upgrade_needed(forced=False):
set_state('kubernetes-master.upgrade-needed')
config = hookenv.config()
previous_channel = config.previous('channel')
require_manual = config.get('require-manual-upgrade')
hookenv.log('set upgrade needed')
if previous_channel is None or not require_manual or forced:
hookenv.log('forcing upgrade')
set_state('kubernetes-master.upgrade-specified')
@when('config.changed.channel')
def channel_changed():
set_upgrade_needed()
def service_cidr():
''' Return the charm's service-cidr config '''
frozen_cidr = db.get('kubernetes-master.service-cidr')
return frozen_cidr or hookenv.config('service-cidr')
def freeze_service_cidr():
''' Freeze the service CIDR. Once the apiserver has started, we can no
longer safely change this value. '''
db.set('kubernetes-master.service-cidr', service_cidr())
def maybe_install_kube_proxy():
if not snap.is_installed('kube-proxy'):
channel = hookenv.config('channel')
hookenv.status_set('maintenance', 'Installing kube-proxy snap')
snap.install('kube-proxy', channel=channel, classic=True)
calculate_and_store_resource_checksums(checksum_prefix, snap_resources)
@hook('upgrade-charm')
def check_for_upgrade_needed():
'''An upgrade charm event was triggered by Juju, react to that here.'''
hookenv.status_set('maintenance', 'Checking resources')
# migrate to new flags
if is_state('kubernetes-master.restarted-for-cloud'):
remove_state('kubernetes-master.restarted-for-cloud')
set_state('kubernetes-master.cloud.ready')
if is_state('kubernetes-master.cloud-request-sent'):
# minor change, just for consistency
remove_state('kubernetes-master.cloud-request-sent')
set_state('kubernetes-master.cloud.request-sent')
# ceph-storage.configured flag no longer exists
remove_state('ceph-storage.configured')
# reconfigure ceph. we need this in case we're reverting from ceph-csi back
# to old ceph on Kubernetes 1.10 or 1.11
remove_state('kubernetes-master.ceph.configured')
migrate_from_pre_snaps()
maybe_install_kube_proxy()
update_certificates()
add_rbac_roles()
switch_auth_mode(forced=True)
set_state('reconfigure.authentication.setup')
remove_state('authentication.setup')
if not db.get('snap.resources.fingerprint.initialised'):
# We are here on an upgrade from non-rolling master
# Since this upgrade might also include resource updates eg
# juju upgrade-charm kubernetes-master --resource kube-any=my.snap
# we take no risk and forcibly upgrade the snaps.
# Forcibly means we do not prompt the user to call the upgrade action.
set_upgrade_needed(forced=True)
migrate_resource_checksums(checksum_prefix, snap_resources)
if check_resources_for_upgrade_needed(checksum_prefix, snap_resources):
set_upgrade_needed()
# Set the auto storage backend to etcd2.
auto_storage_backend = leader_get('auto_storage_backend')
is_leader = is_state('leadership.is_leader')
if not auto_storage_backend and is_leader:
leader_set(auto_storage_backend='etcd2')
if is_leader and not leader_get('auto_dns_provider'):
was_kube_dns = hookenv.config().previous('enable-kube-dns')
if was_kube_dns is True:
leader_set(auto_dns_provider='kube-dns')
elif was_kube_dns is False:
leader_set(auto_dns_provider='none')
def add_rbac_roles():
'''Update the known_tokens file with proper groups.'''
tokens_fname = '/root/cdk/known_tokens.csv'
tokens_backup_fname = '/root/cdk/known_tokens.csv.backup'
move(tokens_fname, tokens_backup_fname)
with open(tokens_fname, 'w') as ftokens:
with open(tokens_backup_fname, 'r') as stream:
for line in stream:
record = line.strip().split(',')
# token, username, user, groups
if record[2] == 'admin' and len(record) == 3:
towrite = '{0},{1},{2},"{3}"\n'.format(record[0],
record[1],
record[2],
'system:masters')
ftokens.write(towrite)
continue
if record[2] == 'kube_proxy':
towrite = '{0},{1},{2}\n'.format(record[0],
'system:kube-proxy',
'kube-proxy')
ftokens.write(towrite)
continue
if record[2] == 'kubelet' and record[1] == 'kubelet':
continue
ftokens.write('{}'.format(line))
def rename_file_idempotent(source, destination):
if os.path.isfile(source):
os.rename(source, destination)
def migrate_from_pre_snaps():
# remove old states
remove_state('kubernetes.components.installed')
remove_state('kubernetes.dashboard.available')
remove_state('kube-dns.available')
remove_state('kubernetes-master.app_version.set')
# disable old services
pre_snap_services = ['kube-apiserver',
'kube-controller-manager',
'kube-scheduler']
for service in pre_snap_services:
service_stop(service)
# rename auth files
os.makedirs('/root/cdk', exist_ok=True)
rename_file_idempotent('/etc/kubernetes/serviceaccount.key',
'/root/cdk/serviceaccount.key')
rename_file_idempotent('/srv/kubernetes/basic_auth.csv',
'/root/cdk/basic_auth.csv')
rename_file_idempotent('/srv/kubernetes/known_tokens.csv',
'/root/cdk/known_tokens.csv')
# cleanup old files
files = [
"/lib/systemd/system/kube-apiserver.service",
"/lib/systemd/system/kube-controller-manager.service",
"/lib/systemd/system/kube-scheduler.service",
"/etc/default/kube-defaults",
"/etc/default/kube-apiserver.defaults",
"/etc/default/kube-controller-manager.defaults",
"/etc/default/kube-scheduler.defaults",
"/home/ubuntu/kubectl",
"/usr/local/bin/kubectl",
"/usr/local/bin/kube-apiserver",
"/usr/local/bin/kube-controller-manager",
"/usr/local/bin/kube-scheduler",
"/etc/kubernetes"
]
for file in files:
if os.path.isdir(file):
hookenv.log("Removing directory: " + file)
shutil.rmtree(file)
elif os.path.isfile(file):
hookenv.log("Removing file: " + file)
os.remove(file)
@when('kubernetes-master.upgrade-specified')
def do_upgrade():
install_snaps()
remove_state('kubernetes-master.upgrade-needed')
remove_state('kubernetes-master.upgrade-specified')
def install_snaps():
channel = hookenv.config('channel')
hookenv.status_set('maintenance', 'Installing core snap')
snap.install('core')
hookenv.status_set('maintenance', 'Installing kubectl snap')
snap.install('kubectl', channel=channel, classic=True)
hookenv.status_set('maintenance', 'Installing kube-apiserver snap')
snap.install('kube-apiserver', channel=channel)
hookenv.status_set('maintenance',
'Installing kube-controller-manager snap')
snap.install('kube-controller-manager', channel=channel)
hookenv.status_set('maintenance', 'Installing kube-scheduler snap')
snap.install('kube-scheduler', channel=channel)
hookenv.status_set('maintenance', 'Installing cdk-addons snap')
snap.install('cdk-addons', channel=channel)
hookenv.status_set('maintenance', 'Installing kube-proxy snap')
snap.install('kube-proxy', channel=channel, classic=True)
calculate_and_store_resource_checksums(checksum_prefix, snap_resources)
db.set('snap.resources.fingerprint.initialised', True)
set_state('kubernetes-master.snaps.installed')
remove_state('kubernetes-master.components.started')
@when('config.changed.client_password', 'leadership.is_leader')
def password_changed():
"""Handle password change via the charms config."""
password = hookenv.config('client_password')
if password == "" and is_state('client.password.initialised'):
# password_changed is called during an upgrade. Nothing to do.
return
elif password == "":
# Password not initialised
password = token_generator()
setup_basic_auth(password, "admin", "admin", "system:masters")
set_state('reconfigure.authentication.setup')
remove_state('authentication.setup')
set_state('client.password.initialised')
@when('config.changed.storage-backend')
def storage_backend_changed():
remove_state('kubernetes-master.components.started')
@when('cni.connected')
@when_not('cni.configured')
def configure_cni(cni):
''' Set master configuration on the CNI relation. This lets the CNI
subordinate know that we're the master so it can respond accordingly. '''
cni.set_config(is_master=True, kubeconfig_path='')
@when('leadership.is_leader')
@when_not('authentication.setup')
def setup_leader_authentication():
'''Setup basic authentication and token access for the cluster.'''
service_key = '/root/cdk/serviceaccount.key'
basic_auth = '/root/cdk/basic_auth.csv'
known_tokens = '/root/cdk/known_tokens.csv'
hookenv.status_set('maintenance', 'Rendering authentication templates.')
keys = [service_key, basic_auth, known_tokens]
# Try first to fetch data from an old leadership broadcast.
if not get_keys_from_leader(keys) \
or is_state('reconfigure.authentication.setup'):
last_pass = get_password('basic_auth.csv', 'admin')
setup_basic_auth(last_pass, 'admin', 'admin', 'system:masters')
if not os.path.isfile(known_tokens):
touch(known_tokens)
# Generate the default service account token key
os.makedirs('/root/cdk', exist_ok=True)
if not os.path.isfile(service_key):
cmd = ['openssl', 'genrsa', '-out', service_key,
'2048']
check_call(cmd)
remove_state('reconfigure.authentication.setup')
# read service account key for syndication
leader_data = {}
for f in [known_tokens, basic_auth, service_key]:
with open(f, 'r') as fp:
leader_data[f] = fp.read()
# this is slightly opaque, but we are sending file contents under its file
# path as a key.
# eg:
# {'/root/cdk/serviceaccount.key': 'RSA:2471731...'}
leader_set(leader_data)
remove_state('kubernetes-master.components.started')
set_state('authentication.setup')
@when_not('leadership.is_leader')
def setup_non_leader_authentication():
service_key = '/root/cdk/serviceaccount.key'
basic_auth = '/root/cdk/basic_auth.csv'
known_tokens = '/root/cdk/known_tokens.csv'
keys = [service_key, basic_auth, known_tokens]
# The source of truth for non-leaders is the leader.
# Therefore we overwrite_local with whatever the leader has.
if not get_keys_from_leader(keys, overwrite_local=True):
# the keys were not retrieved. Non-leaders have to retry.
return
if not any_file_changed(keys) and is_state('authentication.setup'):
# No change detected and we have already setup the authentication
return
hookenv.status_set('maintenance', 'Rendering authentication templates.')
remove_state('kubernetes-master.components.started')
set_state('authentication.setup')
def get_keys_from_leader(keys, overwrite_local=False):
"""
Gets the broadcasted keys from the leader and stores them in
the corresponding files.
Args:
keys: list of keys. Keys are actually files on the FS.
Returns: True if all key were fetched, False if not.
"""
# This races with other codepaths, and seems to require being created first
# This block may be extracted later, but for now seems to work as intended
os.makedirs('/root/cdk', exist_ok=True)
for k in keys:
# If the path does not exist, assume we need it
if not os.path.exists(k) or overwrite_local:
# Fetch data from leadership broadcast
contents = leader_get(k)
# Default to logging the warning and wait for leader data to be set
if contents is None:
hookenv.log('Missing content for file {}'.format(k))
return False
# Write out the file and move on to the next item
with open(k, 'w+') as fp:
fp.write(contents)
fp.write('\n')
return True
@when('kubernetes-master.snaps.installed')
def set_app_version():
''' Declare the application version to juju '''
version = check_output(['kube-apiserver', '--version'])
hookenv.application_version_set(version.split(b' v')[-1].rstrip())
@hookenv.atexit
def set_final_status():
''' Set the final status of the charm as we leave hook execution '''
try:
goal_state = hookenv.goal_state()
except NotImplementedError:
goal_state = {}
if is_flag_set('kubernetes-master.secure-storage.failed'):
hookenv.status_set('blocked',
'Failed to configure encryption; '
'secrets are unencrypted or inaccessible')
return
elif is_flag_set('kubernetes-master.secure-storage.created'):
if not encryption_config_path().exists():
hookenv.status_set('blocked',
'VaultLocker containing encryption config '
'unavailable')
return
vsphere_joined = is_state('endpoint.vsphere.joined')
azure_joined = is_state('endpoint.azure.joined')
cloud_blocked = is_state('kubernetes-master.cloud.blocked')
if vsphere_joined and cloud_blocked:
hookenv.status_set('blocked',
'vSphere integration requires K8s 1.12 or greater')
return
if azure_joined and cloud_blocked:
hookenv.status_set('blocked',
'Azure integration requires K8s 1.11 or greater')
return
if is_state('kubernetes-master.cloud.pending'):
hookenv.status_set('waiting', 'Waiting for cloud integration')
return
if not is_state('kube-api-endpoint.available'):
if 'kube-api-endpoint' in goal_state.get('relations', {}):
status = 'waiting'
else:
status = 'blocked'
hookenv.status_set(status, 'Waiting for kube-api-endpoint relation')
return
if not is_state('kube-control.connected'):
if 'kube-control' in goal_state.get('relations', {}):
status = 'waiting'
else:
status = 'blocked'
hookenv.status_set(status, 'Waiting for workers.')
return
ks = endpoint_from_flag('keystone-credentials.available.auth')
if ks and ks.api_version() == '2':
msg = 'Keystone auth v2 detected. v3 is required.'
hookenv.status_set('blocked', msg)
return
upgrade_needed = is_state('kubernetes-master.upgrade-needed')
upgrade_specified = is_state('kubernetes-master.upgrade-specified')
if upgrade_needed and not upgrade_specified:
msg = 'Needs manual upgrade, run the upgrade action'
hookenv.status_set('blocked', msg)
return
try:
get_dns_provider()
except InvalidDnsProvider as e:
if e.value == 'core-dns':
msg = 'dns-provider=core-dns requires k8s 1.14+'
else:
msg = 'dns-provider=%s is invalid' % e.value
hookenv.status_set('blocked', msg)
return
if is_state('kubernetes-master.components.started'):
# All services should be up and running at this point. Double-check...
failing_services = master_services_down()
if len(failing_services) != 0:
msg = 'Stopped services: {}'.format(','.join(failing_services))
hookenv.status_set('blocked', msg)
return
else:
# if we don't have components starting, we're waiting for that and
# shouldn't fall through to Kubernetes master running.
if (is_state('cni.available')):
hookenv.status_set('maintenance',
'Waiting for master components to start')
else:
hookenv.status_set('waiting',
'Waiting for CNI plugins to become available')
return
# Note that after this point, kubernetes-master.components.started is
# always True.
is_leader = is_state('leadership.is_leader')
authentication_setup = is_state('authentication.setup')
if not is_leader and not authentication_setup:
hookenv.status_set('waiting', "Waiting on leader's crypto keys.")
return
addons_configured = is_state('cdk-addons.configured')
if is_leader and not addons_configured:
hookenv.status_set('waiting', 'Waiting to retry addon deployment')
return
try:
unready = get_kube_system_pods_not_running()
except FailedToGetPodStatus:
hookenv.status_set('waiting', 'Waiting for kube-system pods to start')
return
if unready:
msg = 'Waiting for {} kube-system pod{} to start'
msg = msg.format(len(unready), "s"[len(unready) == 1:])
hookenv.status_set('waiting', msg)
return
if hookenv.config('service-cidr') != service_cidr():
msg = 'WARN: cannot change service-cidr, still using ' + service_cidr()
hookenv.status_set('active', msg)
return
gpu_available = is_state('kube-control.gpu.available')
gpu_enabled = is_state('kubernetes-master.gpu.enabled')
if gpu_available and not gpu_enabled:
msg = 'GPUs available. Set allow-privileged="auto" to enable.'
hookenv.status_set('active', msg)
return
if is_state('ceph-storage.available') and \
is_state('ceph-client.connected') and \
is_state('kubernetes-master.privileged') and \
not is_state('kubernetes-master.ceph.configured'):
ceph_admin = endpoint_from_flag('ceph-storage.available')
if get_version('kube-apiserver') >= (1, 12) and \
not ceph_admin.key():
hookenv.status_set(
'waiting', 'Waiting for Ceph to provide a key.')
return
hookenv.status_set('active', 'Kubernetes master running.')
def master_services_down():
"""Ensure master services are up and running.
Return: list of failing services"""
failing_services = []
for service in master_services:
daemon = 'snap.{}.daemon'.format(service)
if not host.service_running(daemon):
failing_services.append(service)
return failing_services
def add_systemd_file_limit():
directory = '/etc/systemd/system/snap.kube-apiserver.daemon.service.d'
if not os.path.isdir(directory):
os.makedirs(directory)
file_name = 'file-limit.conf'
path = os.path.join(directory, file_name)
if not os.path.isfile(path):
with open(path, 'w') as f:
f.write('[Service]\n')
f.write('LimitNOFILE=65535')
def add_systemd_restart_always():
template = 'templates/service-always-restart.systemd-latest.conf'
try:
# Get the systemd version
cmd = ['systemd', '--version']
output = check_output(cmd).decode('UTF-8')
line = output.splitlines()[0]
words = line.split()
assert words[0] == 'systemd'
systemd_version = int(words[1])
# Check for old version (for xenial support)
if systemd_version < 230:
template = 'templates/service-always-restart.systemd-229.conf'
except Exception:
traceback.print_exc()
hookenv.log('Failed to detect systemd version, using latest template',
level='ERROR')
for service in master_services:
dest_dir = '/etc/systemd/system/snap.{}.daemon.service.d' \
.format(service)
os.makedirs(dest_dir, exist_ok=True)
copyfile(template, '{}/always-restart.conf'.format(dest_dir))
def add_systemd_file_watcher():
"""Setup systemd file-watcher service.
This service watches these files for changes:
/root/cdk/basic_auth.csv
/root/cdk/known_tokens.csv
/root/cdk/serviceaccount.key
If a file is changed, the service uses juju-run to invoke a script in a
hook context on this unit. If this unit is the leader, the script will
call leader-set to distribute the contents of these files to the
non-leaders so they can sync their local copies to match.
"""
render(
'cdk.master.leader.file-watcher.sh',
'/usr/local/sbin/cdk.master.leader.file-watcher.sh',
{}, perms=0o777)
render(
'cdk.master.leader.file-watcher.service',
'/etc/systemd/system/cdk.master.leader.file-watcher.service',
{'unit': hookenv.local_unit()}, perms=0o644)
render(
'cdk.master.leader.file-watcher.path',
'/etc/systemd/system/cdk.master.leader.file-watcher.path',
{}, perms=0o644)
service_resume('cdk.master.leader.file-watcher.path')
@when('etcd.available', 'tls_client.certs.saved',
'authentication.setup',
'leadership.set.auto_storage_backend',
'cni.available')
@when_not('kubernetes-master.components.started',
'kubernetes-master.cloud.pending',
'kubernetes-master.cloud.blocked',
'tls_client.certs.changed',
'tls_client.ca.written')
def start_master():
'''Run the Kubernetes master components.'''
hookenv.status_set('maintenance',
'Configuring the Kubernetes master services.')
freeze_service_cidr()
etcd = endpoint_from_flag('etcd.available')
if not etcd.get_connection_string():
# etcd is not returning a connection string. This happens when
# the master unit disconnects from etcd and is ready to terminate.
# No point in trying to start master services and fail. Just return.
return
# TODO: Make sure below relation is handled on change
# https://github.com/kubernetes/kubernetes/issues/43461
handle_etcd_relation(etcd)
# Set up additional systemd services
add_systemd_restart_always()
add_systemd_file_limit()
add_systemd_file_watcher()
check_call(['systemctl', 'daemon-reload'])
# Add CLI options to all components
configure_apiserver(etcd.get_connection_string())
configure_controller_manager()
configure_scheduler()
# kube-proxy
cni = endpoint_from_flag('cni.available')
cluster_cidr = cni.get_config()['cidr']
configure_kube_proxy(configure_prefix,
['127.0.0.1:8080'], cluster_cidr)
service_restart('snap.kube-proxy.daemon')
set_state('kubernetes-master.components.started')
hookenv.open_port(6443)
@when('tls_client.certs.changed')
def certs_changed():
clear_flag('kubernetes-master.components.started')
clear_flag('tls_client.certs.changed')
@when('tls_client.ca.written')
def ca_written():
clear_flag('kubernetes-master.components.started')
if is_state('leadership.is_leader'):
if leader_get('kubernetes-master-addons-ca-in-use'):
leader_set({'kubernetes-master-addons-restart-for-ca': True})
clear_flag('tls_client.ca.written')
@when('etcd.available')
def etcd_data_change(etcd):
''' Etcd scale events block master reconfiguration due to the
kubernetes-master.components.started state. We need a way to
handle these events consistently only when the number of etcd
units has actually changed '''
# key off of the connection string
connection_string = etcd.get_connection_string()
# If the connection string changes, remove the started state to trigger
# handling of the master components
if data_changed('etcd-connect', connection_string):
remove_state('kubernetes-master.components.started')
# If the cert info changes, remove the started state to trigger
# handling of the master components
if data_changed('etcd-certs', etcd.get_client_credentials()):
clear_flag('kubernetes-master.components.started')
# We are the leader and the auto_storage_backend is not set meaning
# this is the first time we connect to etcd.
auto_storage_backend = leader_get('auto_storage_backend')
is_leader = is_state('leadership.is_leader')
if is_leader and not auto_storage_backend:
if etcd.get_version().startswith('3.'):
leader_set(auto_storage_backend='etcd3')
else:
leader_set(auto_storage_backend='etcd2')
@when('kube-control.connected')
@when('cdk-addons.configured')
def send_cluster_dns_detail(kube_control):
''' Send cluster DNS info '''
try:
dns_provider = get_dns_provider()
except InvalidDnsProvider:
hookenv.log(traceback.format_exc())
return
dns_enabled = dns_provider != 'none'
dns_domain = hookenv.config('dns_domain')
dns_ip = None
if dns_enabled:
try:
dns_ip = get_dns_ip()
except CalledProcessError:
hookenv.log("DNS addon service not ready yet")
return
kube_control.set_dns(53, dns_domain, dns_ip, dns_enabled)
@when('kube-control.connected')
@when('snap.installed.kubectl')
@when('leadership.is_leader')
def create_service_configs(kube_control):
"""Create the users for kubelet"""
should_restart = False
# generate the username/pass for the requesting unit
proxy_token = get_token('system:kube-proxy')
if not proxy_token:
setup_tokens(None, 'system:kube-proxy', 'kube-proxy')
proxy_token = get_token('system:kube-proxy')
should_restart = True
client_token = get_token('admin')
if not client_token:
setup_tokens(None, 'admin', 'admin', "system:masters")
client_token = get_token('admin')
should_restart = True
requests = kube_control.auth_user()
for request in requests:
username = request[1]['user']
group = request[1]['group']
if not username or not group:
continue
kubelet_token = get_token(username)
if not kubelet_token:
# Usernames have to be in the form of system:node:<nodeName>
userid = "kubelet-{}".format(request[0].split('/')[1])
setup_tokens(None, username, userid, group)
kubelet_token = get_token(username)
should_restart = True
kube_control.sign_auth_request(request[0], username,
kubelet_token, proxy_token,
client_token)
if should_restart:
service_restart('snap.kube-apiserver.daemon')
remove_state('authentication.setup')
@when('kube-api-endpoint.available')
def push_service_data():
''' Send configuration to the load balancer, and close access to the
public interface '''
kube_api = endpoint_from_flag('kube-api-endpoint.available')
# Note that we do not need to worry about the loadbalancer case because
# the worker charm will be related to the loadbalancer in that case and
# get the information from there instead of the kubernetes-master charm.
# if the user gave us IPs for the load balancer, assume they know
# what they are talking about and use that instead of our information.
address = None
forced_lb_ips = hookenv.config('loadbalancer-ips').split()
hacluster = endpoint_from_flag('ha.connected')
if forced_lb_ips:
address = forced_lb_ips
elif hacluster:
vips = hookenv.config('ha-cluster-vip').split()
dns_record = hookenv.config('ha-cluster-dns')
if vips:
# each worker unit will pick one based on unit number
address = vips
elif dns_record:
address = dns_record
if address:
kube_api.configure(6443, address, address)
else:
kube_api.configure(6443)
@when('certificates.available', 'kube-api-endpoint.available')
def send_data():
'''Send the data that is required to create a server certificate for
this server.'''
kube_api_endpoint = endpoint_from_flag('kube-api-endpoint.available')
# Use the public ip of this unit as the Common Name for the certificate.
common_name = hookenv.unit_public_ip()
# Get the SDN gateway based on the cidr address.
kubernetes_service_ip = get_kubernetes_service_ip()
# Get ingress address
ingress_ip = get_ingress_address(kube_api_endpoint.endpoint_name)
domain = hookenv.config('dns_domain')
# Create SANs that the tls layer will add to the server cert.
sans = [
hookenv.unit_public_ip(),
ingress_ip,
socket.gethostname(),
kubernetes_service_ip,
'kubernetes',
'kubernetes.{0}'.format(domain),
'kubernetes.default',
'kubernetes.default.svc',
'kubernetes.default.svc.{0}'.format(domain)
]
# if the user gave us IPs for the load balancer, assume they know
# what they are talking about and use that instead of our information.
forced_lb_ips = hookenv.config('loadbalancer-ips').split()
if forced_lb_ips:
sans.extend(forced_lb_ips)
else:
loadbalancer = endpoint_from_flag('loadbalancer.available')
# we don't use get_hacluster_ip_or_hostname only here because
# we want the cert to be valid for all the vips
hacluster = endpoint_from_flag('ha.connected')
if hacluster:
vips = hookenv.config('ha-cluster-vip').split()
dns_record = hookenv.config('ha-cluster-dns')
if vips:
sans.extend(vips)
elif dns_record:
sans.append(dns_record)
elif loadbalancer:
# Get the list of loadbalancers from the relation object.
hosts = loadbalancer.get_addresses_ports()
sans.extend([host.get('public-address') for host in hosts])
# maybe they have extra names they want as SANs
extra_sans = hookenv.config('extra_sans')
if extra_sans and not extra_sans == "":
sans.extend(extra_sans.split())
# Request a server cert with this information.
tls_client.request_server_cert(common_name, sorted(set(sans)),
crt_path=server_crt_path,
key_path=server_key_path)
# Request a client cert for kubelet.
tls_client.request_client_cert('system:kube-apiserver',
crt_path=client_crt_path,
key_path=client_key_path)
@when('config.changed.extra_sans', 'certificates.available',
'kube-api-endpoint.available')
def update_certificates():
# Using the config.changed.extra_sans flag to catch changes.
# IP changes will take ~5 minutes or so to propagate, but
# it will update.
send_data()
clear_flag('config.changed.extra_sans')
@when_any('kubernetes-master.components.started',
'kubernetes-master.ceph.configured',
'keystone-credentials.available.auth')
@when('leadership.is_leader')
def configure_cdk_addons():
''' Configure CDK addons '''
remove_state('cdk-addons.configured')
load_gpu_plugin = hookenv.config('enable-nvidia-plugin').lower()
gpuEnable = (get_version('kube-apiserver') >= (1, 9) and
load_gpu_plugin == "auto" and
is_state('kubernetes-master.gpu.enabled'))
# addons-registry is deprecated in 1.15, but it should take precedence
# when configuring the cdk-addons snap until 1.17 is released.
registry = hookenv.config('addons-registry')
if registry and get_version('kube-apiserver') < (1, 17):
hookenv.log('addons-registry is deprecated; use image-registry instead')
else:
registry = hookenv.config('image-registry')
dbEnabled = str(hookenv.config('enable-dashboard-addons')).lower()
try:
dnsProvider = get_dns_provider()
except InvalidDnsProvider:
hookenv.log(traceback.format_exc())
return
metricsEnabled = str(hookenv.config('enable-metrics')).lower()
default_storage = ''
dashboard_auth = str(hookenv.config('dashboard-auth')).lower()
ceph = {}
ceph_ep = endpoint_from_flag('ceph-storage.available')
if (ceph_ep and ceph_ep.key() and
is_state('kubernetes-master.ceph.configured') and
get_version('kube-apiserver') >= (1, 12)):
cephEnabled = "true"
b64_ceph_key = base64.b64encode(ceph_ep.key().encode('utf-8'))
ceph['admin_key'] = b64_ceph_key.decode('ascii')
ceph['kubernetes_key'] = b64_ceph_key.decode('ascii')
ceph['mon_hosts'] = ceph_ep.mon_hosts()
default_storage = hookenv.config('default-storage')
else:
cephEnabled = "false"
keystone = {}
ks = endpoint_from_flag('keystone-credentials.available.auth')
if ks:
keystoneEnabled = "true"
keystone['cert'] = '/root/cdk/server.crt'
keystone['key'] = '/root/cdk/server.key'
keystone['url'] = '{}://{}:{}/v{}'.format(ks.credentials_protocol(),
ks.credentials_host(),
ks.credentials_port(),
ks.api_version())
keystone['keystone-ca'] = hookenv.config('keystone-ssl-ca')
else:
keystoneEnabled = "false"
if dashboard_auth == 'auto':
if ks:
dashboard_auth = 'token'
else: