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configure_spilo.py
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#!/usr/bin/env python3
# -*- coding: utf-8 -*-
import argparse
import json
import logging
import re
import os
from json.decoder import JSONDecodeError
import psutil
import socket
import subprocess
import sys
import pwd
from copy import deepcopy
from six.moves.urllib_parse import urlparse
from collections import defaultdict
import yaml
import pystache
import requests
from spilo_commons import RW_DIR, PATRONI_CONFIG_FILE, append_extensions,\
get_binary_version, get_bin_dir, is_valid_pg_version, write_file, write_patroni_config
PROVIDER_AWS = "aws"
PROVIDER_GOOGLE = "google"
PROVIDER_OPENSTACK = "openstack"
PROVIDER_LOCAL = "local"
PROVIDER_UNSUPPORTED = "unsupported"
USE_KUBERNETES = os.environ.get('KUBERNETES_SERVICE_HOST') is not None
KUBERNETES_DEFAULT_LABELS = '{"application": "spilo"}'
PATRONI_DCS = ('kubernetes', 'zookeeper', 'exhibitor', 'consul', 'etcd3', 'etcd')
AUTO_ENABLE_WALG_RESTORE = ('WAL_S3_BUCKET', 'WALE_S3_PREFIX', 'WALG_S3_PREFIX', 'WALG_AZ_PREFIX', 'WALG_SSH_PREFIX')
WALG_SSH_NAMES = ['WALG_SSH_PREFIX', 'SSH_PRIVATE_KEY_PATH', 'SSH_USERNAME', 'SSH_PORT']
def parse_args():
sections = ['all', 'patroni', 'pgqd', 'certificate', 'wal-e', 'crontab',
'pam-oauth2', 'pgbouncer', 'bootstrap', 'standby-cluster', 'log']
argp = argparse.ArgumentParser(description='Configures Spilo',
epilog="Choose from the following sections:\n\t{}".format('\n\t'.join(sections)),
formatter_class=argparse.RawDescriptionHelpFormatter)
argp.add_argument('sections', metavar='sections', type=str, nargs='+', choices=sections,
help='Which section to (re)configure')
argp.add_argument('-l', '--loglevel', type=str, help='Explicitly set loglevel')
argp.add_argument('-f', '--force', help='Overwrite files if they exist', default=False, action='store_true')
args = vars(argp.parse_args())
if 'all' in args['sections']:
args['sections'] = sections
args['sections'].remove('all')
args['sections'] = set(args['sections'])
return args
def adjust_owner(resource, uid=None, gid=None):
if uid is None:
uid = pwd.getpwnam('postgres').pw_uid
if gid is None:
gid = pwd.getpwnam('postgres').pw_gid
os.chown(resource, uid, gid)
def link_runit_service(placeholders, name):
rw_service = os.path.join(placeholders['RW_DIR'], 'service')
service_dir = os.path.join(rw_service, name)
if not os.path.exists(service_dir):
if not os.path.exists(rw_service):
os.makedirs(rw_service)
os.symlink(os.path.join('/etc/runit/runsvdir/default', name), service_dir)
os.makedirs(os.path.join(placeholders['RW_DIR'], 'supervise', name))
def write_certificates(environment, overwrite):
"""Write SSL certificate to files
If certificates are specified, they are written, otherwise
dummy certificates are generated and written"""
ssl_keys = ['SSL_CERTIFICATE', 'SSL_PRIVATE_KEY']
if set(ssl_keys) <= set(environment):
logging.info('Writing custom ssl certificate')
for k in ssl_keys:
write_file(environment[k], environment[k + '_FILE'], overwrite)
if 'SSL_CA' in environment:
logging.info('Writing ssl ca certificate')
write_file(environment['SSL_CA'], environment['SSL_CA_FILE'], overwrite)
else:
logging.info('No ca certificate to write')
if 'SSL_CRL' in environment:
logging.info('Writing ssl certificate revocation list')
write_file(environment['SSL_CRL'], environment['SSL_CRL_FILE'], overwrite)
else:
logging.info('No certificate revocation list to write')
else:
if os.path.exists(environment['SSL_PRIVATE_KEY_FILE']) and not overwrite:
logging.warning('Private key already exists, not overwriting. (Use option --force if necessary)')
return
openssl_cmd = [
'/usr/bin/openssl',
'req',
'-nodes',
'-new',
'-x509',
'-subj',
'/CN=spilo.example.org',
'-keyout',
environment['SSL_PRIVATE_KEY_FILE'],
'-out',
environment['SSL_CERTIFICATE_FILE'],
]
logging.info('Generating ssl self-signed certificate')
p = subprocess.Popen(openssl_cmd, shell=False, stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
output, _ = p.communicate()
logging.debug(output)
os.chmod(environment['SSL_PRIVATE_KEY_FILE'], 0o600)
adjust_owner(environment['SSL_PRIVATE_KEY_FILE'], gid=-1)
def write_restapi_certificates(environment, overwrite):
"""Write REST Api SSL certificate to files
If certificates are specified, they are written, otherwise
dummy certificates are generated and written"""
ssl_keys = ['SSL_RESTAPI_CERTIFICATE', 'SSL_RESTAPI_PRIVATE_KEY']
if set(ssl_keys) <= set(environment):
logging.info('Writing REST Api custom ssl certificate')
for k in ssl_keys:
write_file(environment[k], environment[k + '_FILE'], overwrite)
if 'SSL_RESTAPI_CA' in environment:
logging.info('Writing REST Api ssl ca certificate')
write_file(environment['SSL_RESTAPI_CA'], environment['SSL_RESTAPI_CA_FILE'], overwrite)
else:
logging.info('No REST Api ca certificate to write')
os.chmod(environment['SSL_RESTAPI_PRIVATE_KEY_FILE'], 0o600)
adjust_owner(environment['SSL_RESTAPI_PRIVATE_KEY_FILE'], gid=-1)
def deep_update(a, b):
"""Updates data structures
Dicts are merged, recursively
If "a" and "b" are lists, list "a" is used
For anything else, the value of a is returned"""
if type(a) is dict and type(b) is dict:
for key in b:
if key in a:
a[key] = deep_update(a[key], b[key])
else:
a[key] = b[key]
return a
if type(a) is list and type(b) is list:
return a
return a if a is not None else b
TEMPLATE = \
'''
bootstrap:
post_init: /scripts/post_init.sh "{{HUMAN_ROLE}}"
dcs:
{{#STANDBY_CLUSTER}}
standby_cluster:
create_replica_methods:
{{#STANDBY_WITH_WALE}}
- bootstrap_standby_with_wale
{{/STANDBY_WITH_WALE}}
- basebackup_fast_xlog
{{#STANDBY_WITH_WALE}}
restore_command: envdir "{{STANDBY_WALE_ENV_DIR}}" timeout "{{WAL_RESTORE_TIMEOUT}}"
/scripts/restore_command.sh "%f" "%p"
{{/STANDBY_WITH_WALE}}
{{#STANDBY_HOST}}
host: {{STANDBY_HOST}}
{{/STANDBY_HOST}}
{{#STANDBY_PORT}}
port: {{STANDBY_PORT}}
{{/STANDBY_PORT}}
{{#STANDBY_PRIMARY_SLOT_NAME}}
primary_slot_name: {{STANDBY_PRIMARY_SLOT_NAME}}
{{/STANDBY_PRIMARY_SLOT_NAME}}
{{/STANDBY_CLUSTER}}
ttl: 30
loop_wait: &loop_wait 10
retry_timeout: 10
maximum_lag_on_failover: 33554432
postgresql:
use_pg_rewind: true
use_slots: true
parameters:
archive_mode: "on"
archive_timeout: 1800s
wal_level: hot_standby
wal_log_hints: 'on'
wal_compression: 'on'
max_wal_senders: 10
max_connections: {{postgresql.parameters.max_connections}}
max_replication_slots: 10
hot_standby: 'on'
tcp_keepalives_idle: 900
tcp_keepalives_interval: 100
log_line_prefix: '%t [%p]: [%l-1] %c %x %d %u %a %h '
log_checkpoints: 'on'
log_lock_waits: 'on'
log_min_duration_statement: 500
log_autovacuum_min_duration: 0
log_connections: 'on'
log_disconnections: 'on'
log_statement: 'ddl'
log_temp_files: 0
track_functions: all
checkpoint_completion_target: 0.9
autovacuum_max_workers: 5
autovacuum_vacuum_scale_factor: 0.05
autovacuum_analyze_scale_factor: 0.02
{{#CLONE_WITH_WALE}}
method: clone_with_wale
clone_with_wale:
command: envdir "{{CLONE_WALE_ENV_DIR}}" python3 /scripts/clone_with_wale.py
--recovery-target-time="{{CLONE_TARGET_TIME}}"
recovery_conf:
restore_command: envdir "{{CLONE_WALE_ENV_DIR}}" timeout "{{WAL_RESTORE_TIMEOUT}}"
/scripts/restore_command.sh "%f" "%p"
recovery_target_timeline: "{{CLONE_TARGET_TIMELINE}}"
{{#USE_PAUSE_AT_RECOVERY_TARGET}}
recovery_target_action: pause
{{/USE_PAUSE_AT_RECOVERY_TARGET}}
{{^USE_PAUSE_AT_RECOVERY_TARGET}}
recovery_target_action: promote
{{/USE_PAUSE_AT_RECOVERY_TARGET}}
{{#CLONE_TARGET_TIME}}
recovery_target_time: "{{CLONE_TARGET_TIME}}"
{{/CLONE_TARGET_TIME}}
{{^CLONE_TARGET_INCLUSIVE}}
recovery_target_inclusive: false
{{/CLONE_TARGET_INCLUSIVE}}
{{/CLONE_WITH_WALE}}
{{#CLONE_WITH_BASEBACKUP}}
method: clone_with_basebackup
clone_with_basebackup:
command: python3 /scripts/clone_with_basebackup.py --pgpass={{CLONE_PGPASS}} --host={{CLONE_HOST}}
--port={{CLONE_PORT}} --user="{{CLONE_USER}}"
{{/CLONE_WITH_BASEBACKUP}}
initdb:
- encoding: UTF8
- locale: {{INITDB_LOCALE}}.UTF-8
- data-checksums
{{#USE_ADMIN}}
users:
{{PGUSER_ADMIN}}:
password: {{PGPASSWORD_ADMIN}}
options:
- createrole
- createdb
{{/USE_ADMIN}}
scope: &scope '{{SCOPE}}'
restapi:
listen: ':{{APIPORT}}'
connect_address: {{RESTAPI_CONNECT_ADDRESS}}:{{APIPORT}}
{{#SSL_RESTAPI_CA_FILE}}
cafile: {{SSL_RESTAPI_CA_FILE}}
{{/SSL_RESTAPI_CA_FILE}}
{{#SSL_RESTAPI_CERTIFICATE_FILE}}
certfile: {{SSL_RESTAPI_CERTIFICATE_FILE}}
{{/SSL_RESTAPI_CERTIFICATE_FILE}}
{{#SSL_RESTAPI_PRIVATE_KEY_FILE}}
keyfile: {{SSL_RESTAPI_PRIVATE_KEY_FILE}}
{{/SSL_RESTAPI_PRIVATE_KEY_FILE}}
postgresql:
pgpass: /run/postgresql/pgpass
use_unix_socket: true
use_unix_socket_repl: true
name: '{{instance_data.id}}'
listen: '*:{{PGPORT}}'
connect_address: {{instance_data.ip}}:{{PGPORT}}
data_dir: {{PGDATA}}
parameters:
archive_command: {{{postgresql.parameters.archive_command}}}
shared_buffers: {{postgresql.parameters.shared_buffers}}
logging_collector: 'on'
log_destination: csvlog
log_directory: ../pg_log
log_filename: 'postgresql-%u.log'
log_file_mode: '0644'
log_rotation_age: '1d'
log_truncate_on_rotation: 'on'
ssl: 'on'
{{#SSL_CA_FILE}}
ssl_ca_file: {{SSL_CA_FILE}}
{{/SSL_CA_FILE}}
{{#SSL_CRL_FILE}}
ssl_crl_file: {{SSL_CRL_FILE}}
{{/SSL_CRL_FILE}}
ssl_cert_file: {{SSL_CERTIFICATE_FILE}}
ssl_key_file: {{SSL_PRIVATE_KEY_FILE}}
shared_preload_libraries: 'bg_mon,pg_stat_statements,pgextwlist,pg_auth_mon,set_user'
bg_mon.listen_address: '{{BGMON_LISTEN_IP}}'
bg_mon.history_buckets: 120
pg_stat_statements.track_utility: 'off'
extwlist.extensions: 'btree_gin,btree_gist,citext,extra_window_functions,first_last_agg,hll,\
hstore,hypopg,intarray,ltree,pgcrypto,pgq,pgq_node,pg_trgm,postgres_fdw,tablefunc,uuid-ossp'
extwlist.custom_path: /scripts
pg_hba:
- local all all trust
{{#PAM_OAUTH2}}
- hostssl all +{{HUMAN_ROLE}} 127.0.0.1/32 pam
{{/PAM_OAUTH2}}
- host all all 127.0.0.1/32 md5
{{#PAM_OAUTH2}}
- hostssl all +{{HUMAN_ROLE}} ::1/128 pam
{{/PAM_OAUTH2}}
- host all all ::1/128 md5
- local replication {{PGUSER_STANDBY}} trust
- hostssl replication {{PGUSER_STANDBY}} all md5
{{^ALLOW_NOSSL}}
- hostnossl all all all reject
{{/ALLOW_NOSSL}}
{{#PAM_OAUTH2}}
- hostssl all +{{HUMAN_ROLE}} all pam
{{/PAM_OAUTH2}}
{{#ALLOW_NOSSL}}
- host all all all md5
{{/ALLOW_NOSSL}}
{{^ALLOW_NOSSL}}
- hostssl all all all md5
{{/ALLOW_NOSSL}}
{{#USE_WALE}}
recovery_conf:
restore_command: envdir "{{WALE_ENV_DIR}}" timeout "{{WAL_RESTORE_TIMEOUT}}"
/scripts/restore_command.sh "%f" "%p"
{{/USE_WALE}}
authentication:
superuser:
username: {{PGUSER_SUPERUSER}}
password: '{{PGPASSWORD_SUPERUSER}}'
replication:
username: {{PGUSER_STANDBY}}
password: '{{PGPASSWORD_STANDBY}}'
callbacks:
{{#CALLBACK_SCRIPT}}
on_start: {{CALLBACK_SCRIPT}}
on_stop: {{CALLBACK_SCRIPT}}
on_role_change: '/scripts/on_role_change.sh {{HUMAN_ROLE}} {{CALLBACK_SCRIPT}}'
{{/CALLBACK_SCRIPT}}
{{^CALLBACK_SCRIPT}}
on_role_change: '/scripts/on_role_change.sh {{HUMAN_ROLE}} true'
{{/CALLBACK_SCRIPT}}
create_replica_method:
{{#USE_WALE}}
- wal_e
{{/USE_WALE}}
- basebackup_fast_xlog
{{#USE_WALE}}
wal_e:
command: envdir {{WALE_ENV_DIR}} bash /scripts/wale_restore.sh
threshold_megabytes: {{WALE_BACKUP_THRESHOLD_MEGABYTES}}
threshold_backup_size_percentage: {{WALE_BACKUP_THRESHOLD_PERCENTAGE}}
retries: 2
no_master: 1
{{/USE_WALE}}
basebackup_fast_xlog:
command: /scripts/basebackup.sh
retries: 2
{{#STANDBY_WITH_WALE}}
bootstrap_standby_with_wale:
command: envdir "{{STANDBY_WALE_ENV_DIR}}" bash /scripts/wale_restore.sh
threshold_megabytes: {{WALE_BACKUP_THRESHOLD_MEGABYTES}}
threshold_backup_size_percentage: {{WALE_BACKUP_THRESHOLD_PERCENTAGE}}
retries: 2
no_master: 1
{{/STANDBY_WITH_WALE}}
'''
def get_provider():
provider = os.environ.get('SPILO_PROVIDER')
if provider:
if provider in {PROVIDER_AWS, PROVIDER_GOOGLE, PROVIDER_OPENSTACK, PROVIDER_LOCAL}:
return provider
else:
logging.error('Unknown SPILO_PROVIDER: %s', provider)
return PROVIDER_UNSUPPORTED
if os.environ.get('DEVELOP', '').lower() in ['1', 'true', 'on']:
return PROVIDER_LOCAL
try:
logging.info("Figuring out my environment (Google? AWS? Openstack? Local?)")
r = requests.get('http://169.254.169.254', timeout=2)
if r.headers.get('Metadata-Flavor', '') == 'Google':
return PROVIDER_GOOGLE
else:
# accessible on Openstack, will fail on AWS
r = requests.get('http://169.254.169.254/openstack/latest/meta_data.json')
if r.ok:
# make sure the response is parsable - https://github.com/Azure/aad-pod-identity/issues/943 and
# https://github.com/zalando/spilo/issues/542
r.json()
return PROVIDER_OPENSTACK
# is accessible from both AWS and Openstack, Possiblity of misidentification if previous try fails
r = requests.get('http://169.254.169.254/latest/meta-data/ami-id')
return PROVIDER_AWS if r.ok else PROVIDER_UNSUPPORTED
except (requests.exceptions.ConnectTimeout, requests.exceptions.ConnectionError, requests.exceptions.ReadTimeout):
logging.info("Could not connect to 169.254.169.254, assuming local Docker setup")
return PROVIDER_LOCAL
except JSONDecodeError:
logging.info("Could not parse response from 169.254.169.254, assuming local Docker setup")
return PROVIDER_LOCAL
def get_instance_metadata(provider):
metadata = {'ip': socket.getaddrinfo(socket.gethostname(), 0, socket.AF_UNSPEC, socket.SOCK_STREAM, 0)[0][4][0],
'id': socket.gethostname(),
'zone': 'local'}
if USE_KUBERNETES:
metadata['ip'] = os.environ.get('POD_IP', metadata['ip'])
headers = {}
if provider == PROVIDER_GOOGLE:
headers['Metadata-Flavor'] = 'Google'
url = 'http://169.254.169.254/computeMetadata/v1/instance' # metadata.google.internal
mapping = {'zone': 'zone'}
if not USE_KUBERNETES:
mapping.update({'id': 'id'})
elif provider == PROVIDER_AWS:
url = 'http://169.254.169.254/latest/meta-data'
mapping = {'zone': 'placement/availability-zone'}
if not USE_KUBERNETES:
mapping.update({'ip': 'local-ipv4', 'id': 'instance-id'})
elif provider == PROVIDER_OPENSTACK:
mapping = {} # Disable multi-url fetch
url = 'http://169.254.169.254/openstack/latest/meta_data.json'
openstack_metadata = requests.get(url, timeout=5).json()
metadata['zone'] = openstack_metadata['availability_zone']
if not USE_KUBERNETES:
# Try get IP via OpenStack EC2-compatible API, if can't then fail back to auto-discovered one.
metadata['id'] = openstack_metadata['uuid']
url = 'http://169.254.169.254/2009-04-04/meta-data'
r = requests.get(url)
if r.ok:
mapping.update({'ip': 'local-ipv4', 'id': 'instance-id'})
else:
logging.info("No meta-data available for this provider")
return metadata
for k, v in mapping.items():
metadata[k] = requests.get('{}/{}'.format(url, v or k), timeout=2, headers=headers).text
return metadata
def set_extended_wale_placeholders(placeholders, prefix):
""" checks that enough parameters are provided to configure cloning or standby with WAL-E """
for name in ('S3', 'GS', 'GCS', 'SWIFT', 'AZ'):
if placeholders.get('{0}WALE_{1}_PREFIX'.format(prefix, name)) or\
name in ('S3', 'GS', 'AZ') and placeholders.get('{0}WALG_{1}_PREFIX'.format(prefix, name)) or\
placeholders.get('{0}WAL_{1}_BUCKET'.format(prefix, name)) and placeholders.get(prefix + 'SCOPE'):
break
else:
return False
scope = placeholders.get(prefix + 'SCOPE')
dirname = 'env-' + prefix[:-1].lower() + ('-' + scope if scope else '')
placeholders[prefix + 'WALE_ENV_DIR'] = os.path.join(placeholders['RW_DIR'], 'etc', 'wal-e.d', dirname)
placeholders[prefix + 'WITH_WALE'] = True
return name
def set_walg_placeholders(placeholders, prefix=''):
walg_supported = any(placeholders.get(prefix + n) for n in AUTO_ENABLE_WALG_RESTORE +
('WAL_GS_BUCKET', 'WALE_GS_PREFIX', 'WALG_GS_PREFIX'))
default = placeholders.get('USE_WALG', False)
placeholders.setdefault(prefix + 'USE_WALG', default)
for name in ('USE_WALG_BACKUP', 'USE_WALG_RESTORE'):
value = str(placeholders.get(prefix + name, placeholders[prefix + 'USE_WALG'])).lower()
placeholders[prefix + name] = 'true' if value == 'true' and walg_supported else None
def get_listen_ip():
""" Get IP to listen on for things that don't natively support detecting IPv4/IPv6 dualstack """
def has_dual_stack():
if hasattr(socket, 'AF_INET6') and hasattr(socket, 'IPPROTO_IPV6') and hasattr(socket, 'IPV6_V6ONLY'):
sock = None
try:
sock = socket.socket(socket.AF_INET6, socket.SOCK_STREAM)
sock.setsockopt(socket.IPPROTO_IPV6, socket.IPV6_V6ONLY, False)
import urllib3
return urllib3.util.connection.HAS_IPV6
except socket.error as e:
logging.debug('Error when working with ipv6 socket: %s', e)
finally:
if sock:
sock.close()
return False
info = socket.getaddrinfo(None, 0, socket.AF_UNSPEC, socket.SOCK_STREAM, 0, socket.AI_PASSIVE)
# in case dual stack is not supported we want IPv4 to be preferred over IPv6
info.sort(key=lambda x: x[0] == socket.AF_INET, reverse=not has_dual_stack())
return info[0][4][0]
def get_placeholders(provider):
placeholders = dict(os.environ)
placeholders.setdefault('PGHOME', os.path.expanduser('~'))
placeholders.setdefault('APIPORT', '8008')
placeholders.setdefault('BACKUP_SCHEDULE', '0 1 * * *')
placeholders.setdefault('BACKUP_NUM_TO_RETAIN', '5')
placeholders.setdefault('CRONTAB', '[]')
placeholders.setdefault('PGROOT', os.path.join(placeholders['PGHOME'], 'pgroot'))
placeholders.setdefault('WALE_TMPDIR', os.path.abspath(os.path.join(placeholders['PGROOT'], '../tmp')))
placeholders.setdefault('PGDATA', os.path.join(placeholders['PGROOT'], 'pgdata'))
placeholders.setdefault('HUMAN_ROLE', 'zalandos')
placeholders.setdefault('PGUSER_STANDBY', 'standby')
placeholders.setdefault('PGPASSWORD_STANDBY', 'standby')
placeholders.setdefault('USE_ADMIN', 'PGPASSWORD_ADMIN' in placeholders)
placeholders.setdefault('PGUSER_ADMIN', 'admin')
placeholders.setdefault('PGPASSWORD_ADMIN', 'cola')
placeholders.setdefault('PGUSER_SUPERUSER', 'postgres')
placeholders.setdefault('PGPASSWORD_SUPERUSER', 'zalando')
placeholders.setdefault('ALLOW_NOSSL', '')
placeholders.setdefault('BGMON_LISTEN_IP', '0.0.0.0')
placeholders.setdefault('PGPORT', '5432')
placeholders.setdefault('SCOPE', 'dummy')
placeholders.setdefault('RW_DIR', RW_DIR)
placeholders.setdefault('SSL_TEST_RELOAD', 'SSL_PRIVATE_KEY_FILE' in os.environ)
placeholders.setdefault('SSL_CA_FILE', '')
placeholders.setdefault('SSL_CRL_FILE', '')
placeholders.setdefault('SSL_CERTIFICATE_FILE', os.path.join(placeholders['RW_DIR'], 'certs', 'server.crt'))
placeholders.setdefault('SSL_PRIVATE_KEY_FILE', os.path.join(placeholders['RW_DIR'], 'certs', 'server.key'))
placeholders.setdefault('SSL_RESTAPI_CA_FILE', '')
placeholders.setdefault('SSL_RESTAPI_CERTIFICATE_FILE', '')
placeholders.setdefault('SSL_RESTAPI_PRIVATE_KEY_FILE', '')
placeholders.setdefault('WALE_BACKUP_THRESHOLD_MEGABYTES', 102400)
placeholders.setdefault('WALE_BACKUP_THRESHOLD_PERCENTAGE', 30)
placeholders.setdefault('INITDB_LOCALE', 'en_US')
placeholders.setdefault('CLONE_TARGET_TIMELINE', 'latest')
# if Kubernetes is defined as a DCS, derive the namespace from the POD_NAMESPACE, if not set explicitely.
# We only do this for Kubernetes DCS, as we don't want to suddently change, i.e. DCS base path when running
# in Kubernetes with Etcd in a non-default namespace
placeholders.setdefault('NAMESPACE', placeholders.get('POD_NAMESPACE', 'default')
if USE_KUBERNETES and placeholders.get('DCS_ENABLE_KUBERNETES_API') else '')
# use namespaces to set WAL bucket prefix scope naming the folder namespace-clustername for non-default namespace.
placeholders.setdefault('WAL_BUCKET_SCOPE_PREFIX', '{0}-'.format(placeholders['NAMESPACE'])
if placeholders['NAMESPACE'] not in ('default', '') else '')
placeholders.setdefault('WAL_BUCKET_SCOPE_SUFFIX', '')
placeholders.setdefault('WAL_RESTORE_TIMEOUT', '0')
placeholders.setdefault('WALE_ENV_DIR', os.path.join(placeholders['RW_DIR'], 'etc', 'wal-e.d', 'env'))
placeholders.setdefault('USE_WALE', False)
cpu_count = str(min(psutil.cpu_count(), 10))
placeholders.setdefault('WALG_DOWNLOAD_CONCURRENCY', cpu_count)
placeholders.setdefault('WALG_UPLOAD_CONCURRENCY', cpu_count)
placeholders.setdefault('PAM_OAUTH2', '')
placeholders.setdefault('CALLBACK_SCRIPT', '')
placeholders.setdefault('DCS_ENABLE_KUBERNETES_API', '')
placeholders.setdefault('KUBERNETES_ROLE_LABEL', 'spilo-role')
placeholders.setdefault('KUBERNETES_SCOPE_LABEL', 'version')
placeholders.setdefault('KUBERNETES_LABELS', KUBERNETES_DEFAULT_LABELS)
placeholders.setdefault('KUBERNETES_USE_CONFIGMAPS', '')
placeholders.setdefault('KUBERNETES_BYPASS_API_SERVICE', 'true')
placeholders.setdefault('USE_PAUSE_AT_RECOVERY_TARGET', False)
placeholders.setdefault('CLONE_METHOD', '')
placeholders.setdefault('CLONE_WITH_WALE', '')
placeholders.setdefault('CLONE_WITH_BASEBACKUP', '')
placeholders.setdefault('CLONE_TARGET_TIME', '')
placeholders.setdefault('CLONE_TARGET_INCLUSIVE', True)
placeholders.setdefault('LOG_GROUP_BY_DATE', False)
placeholders.setdefault('LOG_SHIP_SCHEDULE', '1 0 * * *')
placeholders.setdefault('LOG_S3_BUCKET', '')
placeholders.setdefault('LOG_S3_ENDPOINT', '')
placeholders.setdefault('LOG_TMPDIR', os.path.abspath(os.path.join(placeholders['PGROOT'], '../tmp')))
placeholders.setdefault('LOG_BUCKET_SCOPE_SUFFIX', '')
# see comment for wal-e bucket prefix
placeholders.setdefault('LOG_BUCKET_SCOPE_PREFIX', '{0}-'.format(placeholders['NAMESPACE'])
if placeholders['NAMESPACE'] not in ('default', '') else '')
if placeholders['CLONE_METHOD'] == 'CLONE_WITH_WALE':
# modify placeholders and take care of error cases
name = set_extended_wale_placeholders(placeholders, 'CLONE_')
if name is False:
logging.warning('Cloning with WAL-E is only possible when CLONE_WALE_*_PREFIX '
'or CLONE_WALG_*_PREFIX or CLONE_WAL_*_BUCKET and CLONE_SCOPE are set.')
elif name == 'S3':
placeholders.setdefault('CLONE_USE_WALG', 'true')
elif placeholders['CLONE_METHOD'] == 'CLONE_WITH_BASEBACKUP':
clone_scope = placeholders.get('CLONE_SCOPE')
if clone_scope and placeholders.get('CLONE_HOST') \
and placeholders.get('CLONE_USER') and placeholders.get('CLONE_PASSWORD'):
placeholders['CLONE_WITH_BASEBACKUP'] = True
placeholders.setdefault('CLONE_PGPASS', os.path.join(placeholders['PGHOME'],
'.pgpass_{0}'.format(clone_scope)))
placeholders.setdefault('CLONE_PORT', 5432)
else:
logging.warning("Clone method is set to basebackup, but no 'CLONE_SCOPE' "
"or 'CLONE_HOST' or 'CLONE_USER' or 'CLONE_PASSWORD' specified")
else:
if set_extended_wale_placeholders(placeholders, 'STANDBY_') == 'S3':
placeholders.setdefault('STANDBY_USE_WALG', 'true')
placeholders.setdefault('STANDBY_WITH_WALE', '')
placeholders.setdefault('STANDBY_HOST', '')
placeholders.setdefault('STANDBY_PORT', '')
placeholders.setdefault('STANDBY_PRIMARY_SLOT_NAME', '')
placeholders.setdefault('STANDBY_CLUSTER', placeholders['STANDBY_WITH_WALE'] or placeholders['STANDBY_HOST'])
if provider == PROVIDER_AWS and not USE_KUBERNETES:
# AWS specific callback to tag the instances with roles
placeholders['CALLBACK_SCRIPT'] = 'python3 /scripts/callback_aws.py'
if placeholders.get('EIP_ALLOCATION'):
placeholders['CALLBACK_SCRIPT'] += ' ' + placeholders['EIP_ALLOCATION']
if any(placeholders.get(n) for n in AUTO_ENABLE_WALG_RESTORE):
placeholders.setdefault('USE_WALG_RESTORE', 'true')
if placeholders.get('WALG_AZ_PREFIX'):
placeholders.setdefault('USE_WALG_BACKUP', 'true')
if all(placeholders.get(n) for n in WALG_SSH_NAMES):
placeholders.setdefault('USE_WALG_BACKUP', 'true')
set_walg_placeholders(placeholders)
placeholders['USE_WALE'] = any(placeholders.get(n) for n in AUTO_ENABLE_WALG_RESTORE +
('WAL_SWIFT_BUCKET', 'WALE_SWIFT_PREFIX', 'WAL_GCS_BUCKET',
'WAL_GS_BUCKET', 'WALE_GS_PREFIX', 'WALG_GS_PREFIX'))
if placeholders.get('WALG_BACKUP_FROM_REPLICA'):
placeholders['WALG_BACKUP_FROM_REPLICA'] = str(placeholders['WALG_BACKUP_FROM_REPLICA']).lower()
# Kubernetes requires a callback to change the labels in order to point to the new master
if USE_KUBERNETES:
if not placeholders.get('DCS_ENABLE_KUBERNETES_API'):
placeholders['CALLBACK_SCRIPT'] = 'python3 /scripts/callback_role.py'
placeholders.setdefault('postgresql', {})
placeholders['postgresql'].setdefault('parameters', {})
placeholders['WALE_BINARY'] = 'wal-g' if placeholders.get('USE_WALG_BACKUP') == 'true' else 'wal-e'
placeholders['postgresql']['parameters']['archive_command'] = \
'envdir "{WALE_ENV_DIR}" {WALE_BINARY} wal-push "%p"'.format(**placeholders) \
if placeholders['USE_WALE'] else '/bin/true'
cgroup_memory_limit_path = '/sys/fs/cgroup/memory/memory.limit_in_bytes'
cgroup_v2_memory_limit_path = '/sys/fs/cgroup/memory.max'
if os.path.exists(cgroup_memory_limit_path):
with open(cgroup_memory_limit_path) as f:
os_memory_mb = int(f.read()) / 1048576
elif os.path.exists(cgroup_v2_memory_limit_path):
with open(cgroup_v2_memory_limit_path) as f:
try:
os_memory_mb = int(f.read()) / 1048576
except Exception: # string literal "max" is a possible value
os_memory_mb = 0x7FFFFFFFFFF
else:
os_memory_mb = sys.maxsize
os_memory_mb = min(os_memory_mb, os.sysconf('SC_PAGE_SIZE') * os.sysconf('SC_PHYS_PAGES') / 1048576)
# Depending on environment we take 1/4 or 1/5 of the memory, expressed in full MB's
sb_ratio = 5 if USE_KUBERNETES else 4
placeholders['postgresql']['parameters']['shared_buffers'] = '{}MB'.format(int(os_memory_mb/sb_ratio))
# # 1 connection per 30 MB, at least 100, at most 1000
placeholders['postgresql']['parameters']['max_connections'] = min(max(100, int(os_memory_mb/30)), 1000)
placeholders['instance_data'] = get_instance_metadata(provider)
placeholders.setdefault('RESTAPI_CONNECT_ADDRESS', placeholders['instance_data']['ip'])
placeholders['BGMON_LISTEN_IP'] = get_listen_ip()
if 'SSL_CA' in placeholders and placeholders['SSL_CA_FILE'] == '':
placeholders['SSL_CA_FILE'] = os.path.join(placeholders['RW_DIR'], 'certs', 'ca.crt')
if 'SSL_CRL' in placeholders and placeholders['SSL_CRL_FILE'] == '':
placeholders['SSL_CRL_FILE'] = os.path.join(placeholders['RW_DIR'], 'certs', 'server.crl')
if {'SSL_RESTAPI_CERTIFICATE', 'SSL_RESTAPI_PRIVATE_KEY'} <= set(placeholders):
if not placeholders['SSL_RESTAPI_CERTIFICATE_FILE']:
placeholders['SSL_RESTAPI_CERTIFICATE_FILE'] = os.path.join(placeholders['RW_DIR'], 'certs',
'rest-api-server.crt')
if not placeholders['SSL_RESTAPI_PRIVATE_KEY_FILE']:
placeholders['SSL_RESTAPI_PRIVATE_KEY_FILE'] = os.path.join(placeholders['RW_DIR'], 'certs',
'restapi-api-server.key')
if placeholders.get('SSL_RESTAPI_CA') and not placeholders['SSL_RESTAPI_CA_FILE']:
placeholders['SSL_RESTAPI_CA_FILE'] = os.path.join(placeholders['RW_DIR'], 'certs', 'rest-api-ca.crt')
return placeholders
def pystache_render(*args, **kwargs):
render = pystache.Renderer(missing_tags='strict')
return render.render(*args, **kwargs)
def get_dcs_config(config, placeholders):
# (KUBERNETES|ZOOKEEPER|EXHIBITOR|CONSUL|ETCD3|ETCD)_(HOSTS|HOST|PORT|...)
dcs_configs = defaultdict(dict)
for name, value in placeholders.items():
if '_' not in name:
continue
dcs, param = name.lower().split('_', 1)
if dcs in PATRONI_DCS:
if param == 'hosts':
if not (value.strip().startswith('-') or '[' in value):
value = '[{0}]'.format(value)
value = yaml.safe_load(value)
elif param == 'discovery_domain':
param = 'discovery_srv'
dcs_configs[dcs][param] = value
if USE_KUBERNETES and placeholders.get('DCS_ENABLE_KUBERNETES_API'):
config = {'kubernetes': dcs_configs['kubernetes']}
try:
kubernetes_labels = json.loads(config['kubernetes'].get('labels'))
except (TypeError, ValueError) as e:
logging.warning("could not parse kubernetes labels as a JSON: %r, "
"reverting to the default: %s", e, KUBERNETES_DEFAULT_LABELS)
kubernetes_labels = json.loads(KUBERNETES_DEFAULT_LABELS)
config['kubernetes']['labels'] = kubernetes_labels
if not config['kubernetes'].pop('use_configmaps'):
config['kubernetes'].update({'use_endpoints': True,
'pod_ip': placeholders['instance_data']['ip'],
'ports': [{'port': 5432, 'name': 'postgresql'}]})
if str(config['kubernetes'].pop('bypass_api_service', None)).lower() == 'true':
config['kubernetes']['bypass_api_service'] = True
else:
for dcs in PATRONI_DCS:
if dcs != 'kubernetes' and dcs in dcs_configs:
config = {dcs: dcs_configs[dcs]}
break
else:
config = {} # Configuration can also be specified using either SPILO_CONFIGURATION or PATRONI_CONFIGURATION
if placeholders['NAMESPACE'] not in ('default', ''):
config['namespace'] = placeholders['NAMESPACE']
return config
def write_log_environment(placeholders):
log_env = defaultdict(lambda: '')
log_env.update(placeholders)
aws_region = log_env.get('AWS_REGION')
if not aws_region:
aws_region = placeholders['instance_data']['zone'][:-1]
log_env['LOG_AWS_REGION'] = aws_region
log_s3_key = 'spilo/{LOG_BUCKET_SCOPE_PREFIX}{SCOPE}{LOG_BUCKET_SCOPE_SUFFIX}/log/'.format(**log_env)
if os.getenv('LOG_GROUP_BY_DATE'):
log_s3_key += '{DATE}/'
log_s3_key += placeholders['instance_data']['id']
log_env['LOG_S3_KEY'] = log_s3_key
if not os.path.exists(log_env['LOG_TMPDIR']):
os.makedirs(log_env['LOG_TMPDIR'])
os.chmod(log_env['LOG_TMPDIR'], 0o1777)
if not os.path.exists(log_env['LOG_ENV_DIR']):
os.makedirs(log_env['LOG_ENV_DIR'])
for var in ('LOG_TMPDIR', 'LOG_AWS_REGION', 'LOG_S3_ENDPOINT', 'LOG_S3_KEY', 'LOG_S3_BUCKET', 'PGLOG'):
write_file(log_env[var], os.path.join(log_env['LOG_ENV_DIR'], var), True)
def write_wale_environment(placeholders, prefix, overwrite):
s3_names = ['WALE_S3_PREFIX', 'WALG_S3_PREFIX', 'AWS_ACCESS_KEY_ID', 'AWS_SECRET_ACCESS_KEY',
'WALE_S3_ENDPOINT', 'AWS_ENDPOINT', 'AWS_REGION', 'AWS_INSTANCE_PROFILE', 'WALE_DISABLE_S3_SSE',
'WALG_S3_SSE_KMS_ID', 'WALG_S3_SSE', 'WALG_DISABLE_S3_SSE', 'AWS_S3_FORCE_PATH_STYLE', 'AWS_ROLE_ARN',
'AWS_WEB_IDENTITY_TOKEN_FILE', 'AWS_STS_REGIONAL_ENDPOINTS']
azure_names = ['WALG_AZ_PREFIX', 'AZURE_STORAGE_ACCOUNT', 'WALG_AZURE_BUFFER_SIZE', 'WALG_AZURE_MAX_BUFFERS',
'AZURE_ENVIRONMENT_NAME']
azure_auth_names = ['AZURE_STORAGE_ACCESS_KEY', 'AZURE_STORAGE_SAS_TOKEN', 'AZURE_CLIENT_ID',
'AZURE_CLIENT_SECRET', 'AZURE_TENANT_ID']
gs_names = ['WALE_GS_PREFIX', 'WALG_GS_PREFIX', 'GOOGLE_APPLICATION_CREDENTIALS']
swift_names = ['WALE_SWIFT_PREFIX', 'SWIFT_AUTHURL', 'SWIFT_TENANT', 'SWIFT_TENANT_ID', 'SWIFT_USER',
'SWIFT_USER_ID', 'SWIFT_USER_DOMAIN_NAME', 'SWIFT_USER_DOMAIN_ID', 'SWIFT_PASSWORD',
'SWIFT_AUTH_VERSION', 'SWIFT_ENDPOINT_TYPE', 'SWIFT_REGION', 'SWIFT_DOMAIN_NAME', 'SWIFT_DOMAIN_ID',
'SWIFT_PROJECT_NAME', 'SWIFT_PROJECT_ID', 'SWIFT_PROJECT_DOMAIN_NAME', 'SWIFT_PROJECT_DOMAIN_ID']
ssh_names = WALG_SSH_NAMES
walg_names = ['WALG_DELTA_MAX_STEPS', 'WALG_DELTA_ORIGIN', 'WALG_DOWNLOAD_CONCURRENCY',
'WALG_UPLOAD_CONCURRENCY', 'WALG_UPLOAD_DISK_CONCURRENCY', 'WALG_DISK_RATE_LIMIT',
'WALG_NETWORK_RATE_LIMIT', 'WALG_COMPRESSION_METHOD', 'USE_WALG_BACKUP',
'USE_WALG_RESTORE', 'WALG_BACKUP_COMPRESSION_METHOD', 'WALG_BACKUP_FROM_REPLICA',
'WALG_SENTINEL_USER_DATA', 'WALG_PREVENT_WAL_OVERWRITE', 'WALG_S3_CA_CERT_FILE',
'WALG_LIBSODIUM_KEY', 'WALG_LIBSODIUM_KEY_PATH', 'WALG_LIBSODIUM_KEY_TRANSFORM',
'WALG_PGP_KEY', 'WALG_PGP_KEY_PATH', 'WALG_PGP_KEY_PASSPHRASE',
'no_proxy', 'http_proxy', 'https_proxy']
wale = defaultdict(lambda: '')
for name in ['PGVERSION', 'PGPORT', 'WALE_ENV_DIR', 'SCOPE', 'WAL_BUCKET_SCOPE_PREFIX', 'WAL_BUCKET_SCOPE_SUFFIX',
'WAL_S3_BUCKET', 'WAL_GCS_BUCKET', 'WAL_GS_BUCKET', 'WAL_SWIFT_BUCKET', 'BACKUP_NUM_TO_RETAIN',
'ENABLE_WAL_PATH_COMPAT'] + s3_names + swift_names + gs_names + walg_names + azure_names + \
azure_auth_names + ssh_names:
wale[name] = placeholders.get(prefix + name, '')
if wale.get('WAL_S3_BUCKET') or wale.get('WALE_S3_PREFIX') or wale.get('WALG_S3_PREFIX'):
wale_endpoint = wale.pop('WALE_S3_ENDPOINT', None)
aws_endpoint = wale.pop('AWS_ENDPOINT', None)
aws_region = wale.pop('AWS_REGION', None)
# for S3-compatible storage we want to specify WALE_S3_ENDPOINT and AWS_ENDPOINT, but not AWS_REGION
if aws_endpoint or wale_endpoint:
convention = 'path'
if not wale_endpoint:
wale_endpoint = aws_endpoint.replace('://', '+path://')
else:
match = re.match(r'^(\w+)\+(\w+)(://.+)$', wale_endpoint)
if match:
convention = match.group(2)
else:
logging.warning('Invalid WALE_S3_ENDPOINT, the format is protocol+convention://hostname:port, '
'but got %s', wale_endpoint)
if not aws_endpoint:
aws_endpoint = match.expand(r'\1\3') if match else wale_endpoint
wale.update(WALE_S3_ENDPOINT=wale_endpoint, AWS_ENDPOINT=aws_endpoint)
for name in ('WALE_DISABLE_S3_SSE', 'WALG_DISABLE_S3_SSE'):
if not wale.get(name):
wale[name] = 'true'
wale['AWS_S3_FORCE_PATH_STYLE'] = 'true' if convention == 'path' else 'false'
if aws_region and wale.get('USE_WALG_BACKUP') == 'true':
wale['AWS_REGION'] = aws_region
elif not aws_region:
# try to determine region from the endpoint or bucket name
name = wale.get('WAL_S3_BUCKET') or wale.get('WALE_S3_PREFIX')
match = re.search(r'.*(\w{2}-\w+-\d)-.*', name)
if match:
aws_region = match.group(1)
else:
aws_region = placeholders['instance_data']['zone'][:-1]
wale['AWS_REGION'] = aws_region
else:
wale['AWS_REGION'] = aws_region
if not (wale.get('AWS_SECRET_ACCESS_KEY') and wale.get('AWS_ACCESS_KEY_ID')):
wale['AWS_INSTANCE_PROFILE'] = 'true'
if wale.get('WALE_DISABLE_S3_SSE') and not wale.get('WALG_DISABLE_S3_SSE'):
wale['WALG_DISABLE_S3_SSE'] = wale['WALE_DISABLE_S3_SSE']
if wale.get('USE_WALG_BACKUP') and wale.get('WALG_DISABLE_S3_SSE') != 'true' and not wale.get('WALG_S3_SSE'):
wale['WALG_S3_SSE'] = 'AES256'
write_envdir_names = s3_names + walg_names
elif wale.get('WAL_GCS_BUCKET') or wale.get('WAL_GS_BUCKET') or\
wale.get('WALE_GCS_PREFIX') or wale.get('WALE_GS_PREFIX') or wale.get('WALG_GS_PREFIX'):
if wale.get('WALE_GCS_PREFIX'):
wale['WALE_GS_PREFIX'] = wale['WALE_GCS_PREFIX']
elif wale.get('WAL_GCS_BUCKET'):
wale['WAL_GS_BUCKET'] = wale['WAL_GCS_BUCKET']
write_envdir_names = gs_names + walg_names
elif wale.get('WAL_SWIFT_BUCKET') or wale.get('WALE_SWIFT_PREFIX'):
write_envdir_names = swift_names
elif wale.get("WALG_AZ_PREFIX"):
azure_auth = []
auth_opts = 0
if wale.get('AZURE_STORAGE_ACCESS_KEY'):
azure_auth.append('AZURE_STORAGE_ACCESS_KEY')
auth_opts += 1
if wale.get('AZURE_STORAGE_SAS_TOKEN'):
if auth_opts == 0:
azure_auth.append('AZURE_STORAGE_SAS_TOKEN')
auth_opts += 1
if wale.get('AZURE_CLIENT_ID') and wale.get('AZURE_CLIENT_SECRET') and wale.get('AZURE_TENANT_ID'):
if auth_opts == 0:
azure_auth.extend(['AZURE_CLIENT_ID', 'AZURE_CLIENT_SECRET', 'AZURE_TENANT_ID'])
auth_opts += 1
if auth_opts > 1:
logging.warning('Multiple authentication options configured for wal-g backup to Azure, using %s. Provide '
'either AZURE_STORAGE_ACCESS_KEY or AZURE_STORAGE_SAS_TOKEN or Service Principal '
'(AZURE_CLIENT_ID, AZURE_CLIENT_SECRET, AZURE_TENANT_ID) for authentication (or use '
'MSI).', '/'.join(azure_auth))
write_envdir_names = azure_names + azure_auth + walg_names
elif wale.get("WALG_SSH_PREFIX"):
write_envdir_names = ssh_names + walg_names
else:
return
prefix_env_name = write_envdir_names[0]
store_type = prefix_env_name[5:].split('_')[0]
if not wale.get(prefix_env_name): # WALE_*_PREFIX is not defined in the environment
bucket_path = '/spilo/{WAL_BUCKET_SCOPE_PREFIX}{SCOPE}{WAL_BUCKET_SCOPE_SUFFIX}/wal/{PGVERSION}'.format(**wale)
prefix_template = '{0}://{{WAL_{1}_BUCKET}}{2}'.format(store_type.lower(), store_type, bucket_path)
wale[prefix_env_name] = prefix_template.format(**wale)
# Set WALG_*_PREFIX for future compatibility
if store_type in ('S3', 'GS') and not wale.get(write_envdir_names[1]):
wale[write_envdir_names[1]] = wale[prefix_env_name]
if not os.path.exists(wale['WALE_ENV_DIR']):
os.makedirs(wale['WALE_ENV_DIR'])
wale['WALE_LOG_DESTINATION'] = 'stderr'
for name in write_envdir_names + ['WALE_LOG_DESTINATION', 'PGPORT'] + ([] if prefix else ['BACKUP_NUM_TO_RETAIN']):
if wale.get(name):
path = os.path.join(wale['WALE_ENV_DIR'], name)
write_file(wale[name], path, overwrite)
adjust_owner(path, gid=-1)
if not os.path.exists(placeholders['WALE_TMPDIR']):
os.makedirs(placeholders['WALE_TMPDIR'])
os.chmod(placeholders['WALE_TMPDIR'], 0o1777)
write_file(placeholders['WALE_TMPDIR'], os.path.join(wale['WALE_ENV_DIR'], 'TMPDIR'), True)
def update_and_write_wale_configuration(placeholders, prefix, overwrite):
set_walg_placeholders(placeholders, prefix)
write_wale_environment(placeholders, prefix, overwrite)
def write_clone_pgpass(placeholders, overwrite):
pgpassfile = placeholders['CLONE_PGPASS']
# pgpass is host:port:database:user:password
r = {'host': escape_pgpass_value(placeholders['CLONE_HOST']),
'port': placeholders['CLONE_PORT'],
'database': '*',
'user': escape_pgpass_value(placeholders['CLONE_USER']),
'password': escape_pgpass_value(placeholders['CLONE_PASSWORD'])}
pgpass_string = "{host}:{port}:{database}:{user}:{password}".format(**r)
write_file(pgpass_string, pgpassfile, overwrite)
os.chmod(pgpassfile, 0o600)
adjust_owner(pgpassfile, gid=-1)
def check_crontab(user):
with open(os.devnull, 'w') as devnull:
cron_exit = subprocess.call(['crontab', '-lu', user], stdout=devnull, stderr=devnull)
if cron_exit == 0:
return logging.warning('Cron for %s is already configured. (Use option --force to overwrite cron)', user)
return True
def setup_crontab(user, lines):
lines += [''] # EOF requires empty line for cron
c = subprocess.Popen(['crontab', '-u', user, '-'], stdin=subprocess.PIPE)
c.communicate(input='\n'.join(lines).encode())
def setup_runit_cron(placeholders):
crontabs = os.path.join(placeholders['RW_DIR'], 'cron', 'crontabs')
if not os.path.exists(crontabs):
os.makedirs(crontabs)
os.chmod(crontabs, 0o1730)
if os.getuid() == 0:
import grp
os.chown(crontabs, -1, grp.getgrnam('crontab').gr_gid)
link_runit_service(placeholders, 'cron')
def write_crontab(placeholders, overwrite):
lines = ['PATH={PATH}'.format(**placeholders)]
root_lines = []
sys_nice_is_set = no_new_privs = None
with open('/proc/self/status') as f:
for line in f:
if line.startswith('NoNewPrivs:'):
no_new_privs = bool(int(line[12:]))
elif line.startswith('CapBnd:'):
sys_nice = 0x800000
sys_nice_is_set = int(line[8:], 16) & sys_nice == sys_nice
if sys_nice_is_set:
renice = '*/5 * * * * bash /scripts/renice.sh'
if not no_new_privs:
lines += [renice]
elif os.getuid() == 0:
root_lines = [lines[0], renice]
else:
logging.info('Skipping creation of renice cron job due to running as not root '
'and with "no-new-privileges:true" (allowPrivilegeEscalation=false on K8s)')
else:
logging.info('Skipping creation of renice cron job due to lack of SYS_NICE capability')
if placeholders.get('SSL_TEST_RELOAD'):
env = ' '.join('{0}="{1}"'.format(n, placeholders[n]) for n in ('PGDATA', 'SSL_CA_FILE', 'SSL_CRL_FILE',
'SSL_CERTIFICATE_FILE', 'SSL_PRIVATE_KEY_FILE') if placeholders.get(n))
hash_dir = os.path.join(placeholders['RW_DIR'], 'tmp')
lines += ['*/5 * * * * {0} /scripts/test_reload_ssl.sh {1}'.format(env, hash_dir)]
if bool(placeholders.get('USE_WALE')):
lines += [('{BACKUP_SCHEDULE} envdir "{WALE_ENV_DIR}" /scripts/postgres_backup.sh' +