def add_slave(self, yes=False):
"""Add slave of cluster
Add slaves to cluster that configured master only.
:param yes: Skip confirm information
"""
logger.debug('add_slave')
if not isinstance(yes, bool):
msg = message.get('error_option_type_not_boolean')
msg = msg.format(option='yes')
logger.error(msg)
return
center = Center()
center.update_ip_port()
# check
s_hosts = center.slave_host_list
s_ports = center.slave_port_list
if not s_hosts:
msg = message.get('error_slave_host_empty')
raise ClusterRedisError(msg)
if not s_ports:
msg = message.get('error_slave_port_empty')
raise ClusterRedisError(msg)
success = center.check_hosts_connection(hosts=s_hosts)
if not success:
return
center.ensure_cluster_exist()
slave_alive_count = center.get_alive_slave_redis_count()
slave_alive_count_mine = center.get_alive_slave_redis_count(
check_owner=True
)
not_mine_count = slave_alive_count - slave_alive_count_mine
if not_mine_count > 0:
msg = message.get('error_cluster_start_slave_collision')
msg = '\n'.join(msg).format(count=not_mine_count)
raise LightningDBError(12, msg)
# confirm info
result = center.confirm_node_port_info(skip=yes)
if not result:
msg = message.get('cancel')
logger.warning(msg)
return
# clean
center.cluster_clean(master=False)
# backup logs
center.backup_server_logs(master=False)
center.create_redis_data_directory(master=False)
# configure
center.configure_redis(master=False)
center.sync_conf()
# start
center.start_redis_process(master=False)
center.wait_until_all_redis_process_up()
# change redis config temporarily
key = 'cluster-node-timeout'
origin_s_value = center.cli_config_get(key, s_hosts[0], s_ports[0])
if not origin_s_value:
msg = "RedisConfigKeyError: '{}'".format(key)
logger.warning(msg)
if origin_s_value:
# cli config set cluster-node-timeout 2000
logger.debug('set cluster node time out 2000 for create')
center.cli_config_set_all(key, '2000', s_hosts, s_ports)
# create
center.replicate()
if origin_s_value:
# cli config restore cluster-node-timeout
logger.debug('restore cluster node time out')
center.cli_config_set_all(key, origin_s_value, s_hosts, s_ports)
def _deploy_zero_downtime(cluster_id):
logger.debug("zero downtime update cluster {}".format(cluster_id))
center = Center()
center.update_ip_port()
m_hosts = center.master_host_list
m_ports = center.master_port_list
s_hosts = center.slave_host_list
s_ports = center.slave_port_list
path_of_fb = config.get_path_of_fb(cluster_id)
cluster_path = path_of_fb['cluster_path']
# check master alive
m_count = len(m_hosts) * len(m_ports)
alive_m_count = center.get_alive_master_redis_count()
if alive_m_count < m_count:
logger.error(message.get('error_exist_disconnected_master'))
return
if not config.is_slave_enabled:
logger.error(message.get('error_need_to_slave'))
return
# select installer
installer_path = ask_util.installer()
installer_name = os.path.basename(installer_path)
# backup info
current_time = time.strftime("%Y%m%d%H%M%S", time.gmtime())
conf_backup_dir = 'cluster_{}_conf_bak_{}'.format(cluster_id, current_time)
cluster_backup_dir = 'cluster_{}_bak_{}'.format(cluster_id, current_time)
local_ip = config.get_local_ip()
# backup conf
center.conf_backup(local_ip, cluster_id, conf_backup_dir)
# backup cluster
for host in s_hosts:
client = net.get_ssh(host)
center.cluster_backup(host, cluster_id, cluster_backup_dir)
client.close()
# transfer & install
logger.info(message.get('transfer_and_execute_installer'))
for host in m_hosts:
logger.info(' - {}'.format(host))
client = net.get_ssh(host)
cmd = 'mkdir -p {0} && touch {0}/.deploy.state'.format(cluster_path)
net.ssh_execute(client=client, command=cmd)
client.close()
DeployUtil().transfer_installer(host, cluster_id, installer_path)
try:
DeployUtil().install(host, cluster_id, installer_name)
except SSHCommandError as ex:
msg = message.get('error_execute_installer')
msg = msg.format(installer=installer_path)
logger.error(msg)
logger.exception(ex)
return
# restore conf
center.conf_restore(local_ip, cluster_id, conf_backup_dir)
# set deploy state complete
for node in m_hosts:
path_of_fb = config.get_path_of_fb(cluster_id)
cluster_path = path_of_fb['cluster_path']
client = net.get_ssh(node)
cmd = 'rm -rf {}'.format(os.path.join(cluster_path, '.deploy.state'))
net.ssh_execute(client=client, command=cmd)
client.close()
# restart slave
center.stop_current_nodes(master=False, slave=True)
center.configure_redis()
center.sync_conf()
center.start_current_nodes(master=False, slave=True)
center.wait_until_all_redis_process_up()
slaves_for_failover = center.get_slave_nodes()
key = 'cluster-node-timeout'
origin_m_value = center.cli_config_get(key, m_hosts[0], m_ports[0])
origin_s_value = center.cli_config_get(key, s_hosts[0], s_ports[0])
logger.debug('config set: cluster-node-timeout 2000')
RedisCliConfig().set(key, '2000', all=True)
# cluster failover (with no option)
logger.info(message.get('failover_on_deploy'))
logger.debug(slaves_for_failover)
try_count = 0
while try_count < 10:
try_count += 1
success = True
for slave_addr in slaves_for_failover:
host, port = slave_addr.split(':')
stdout = center.run_failover("{}:{}".format(host, port))
logger.debug("failover {}:{} {}".format(host, port, stdout))
if stdout != "ERR You should send CLUSTER FAILOVER to a slave":
# In some cases, the cluster failover is not complete
# even if stdout is OK
# If redis changed to master completely,
# return 'ERR You should send CLUSTER FAILOVER to a slave'
success = False
if success:
break
msg = message.get('retry').format(try_count=try_count)
logger.info(msg)
time.sleep(5)
logger.debug('restore config: cluster-node-timeout')
center.cli_config_set_all(key, origin_m_value, m_hosts, m_ports)
center.cli_config_set_all(key, origin_s_value, s_hosts, s_ports)
if not success:
logger.error(message.get('error_redis_failover'))
return
# restart master (current slave)
center.stop_current_nodes(master=False, slave=True)
center.configure_redis(slave=False)
center.sync_conf()
center.start_current_nodes(master=False, slave=True)
center.wait_until_all_redis_process_up()
def create(self, yes=False):
"""Create cluster
Before create cluster, all redis should be running.
:param yes: skip confirm information
"""
center = Center()
center.update_ip_port()
success = center.check_hosts_connection()
if not success:
return
m_count = len(center.master_host_list) * len(center.master_port_list)
if m_count < 3:
msg = message.get('error_master_redis_less_than_3')
raise ClusterRedisError(msg)
# if need to cluster start
alive_count = center.get_alive_all_redis_count()
my_alive_count = center.get_alive_all_redis_count(check_owner=True)
if alive_count != my_alive_count:
msg = message.get('error_cluster_start_port_collision')
raise ClusterRedisError(msg)
all_count = len(center.all_host_list)
if alive_count < all_count:
logger.debug('cluster start in create')
# init
center.backup_server_logs()
center.create_redis_data_directory()
# cluster configure
center.configure_redis()
center.sync_conf(show_result=True)
# cluster start
center.start_redis_process()
center.wait_until_all_redis_process_up()
key = 'cluster-node-timeout'
m_hosts = center.master_host_list
m_ports = center.master_port_list
origin_m_value = center.cli_config_get(key, m_hosts[0], m_ports[0])
if not origin_m_value:
msg = "RedisConfigKeyError(master): '{}'".format(key)
logger.warning(msg)
s_hosts = center.slave_host_list
s_ports = center.slave_port_list
if s_hosts and s_ports:
origin_s_value = center.cli_config_get(key, s_hosts[0], s_ports[0])
if not origin_s_value:
msg = "RedisConfigKeyError(slave): '{}'".format(key)
logger.warning(msg)
if origin_m_value:
# cli config set cluster-node-timeout 2000
logger.debug('set cluster node time out 2000 for create')
center.cli_config_set_all(key, '2000', m_hosts, m_ports)
if s_hosts and s_ports and origin_s_value:
center.cli_config_set_all(key, '2000', s_hosts, s_ports)
center.create_cluster(yes)
if origin_m_value:
# cli config restore cluster-node-timeout
logger.debug('restore cluster node time out')
center.cli_config_set_all(key, origin_m_value, m_hosts, m_ports)
if s_hosts and s_ports and origin_s_value:
v = origin_s_value
center.cli_config_set_all(key, v, s_hosts, s_ports)
