def start(self, env, upgrade_type=None):
import params
env.set_params(params)
self.configure(env, upgrade_type=upgrade_type)
daemon_cmd = get_daemon_cmd(params, self.nodeType, "start")
# Verify Database connection on Druid start
if params.metadata_storage_type == 'mysql':
if not params.jdbc_driver_jar or not os.path.isfile(
params.connector_download_dir + os.path.sep +
params.jdbc_driver_jar):
path_to_jdbc = params.druid_extensions_dir + os.path.sep + "*"
error_message = "Error! Sorry, but we can't find jdbc driver for mysql.So, db connection check can fail." + \
"Please run 'ambari-server setup --jdbc-db=mysql --jdbc-driver={path_to_jdbc} on server host.'"
Logger.error(error_message)
else:
path_to_jdbc = params.connector_download_dir + os.path.sep + params.jdbc_driver_jar
db_connection_check_command = format(
"{params.java8_home}/bin/java -cp {params.check_db_connection_jar}:{path_to_jdbc} org.apache.ambari.server.DBConnectionVerification '{params.metadata_storage_url}' {params.metadata_storage_user} {params.metadata_storage_password!p} com.mysql.jdbc.Driver"
)
else:
db_connection_check_command = None
if db_connection_check_command:
sudo.chmod(params.check_db_connection_jar, 0755)
Execute(db_connection_check_command,
tries=5,
try_sleep=10,
user=params.druid_user)
try:
Execute(daemon_cmd, user=params.druid_user)
except:
show_logs(params.druid_log_dir, params.druid_user)
raise
def stop(self, env, upgrade_type=None):
import params
env.set_params(params)
daemon_cmd = get_daemon_cmd(params, self.nodeType, "stop")
try:
Execute(daemon_cmd, user=params.druid_user)
except:
show_logs(params.druid_log_dir, params.druid_user)
raise
def stop(self, env, upgrade_type=None):
import params
env.set_params(params)
pid_file = getPid(params, self.nodeType)
process_id_exists_command = as_sudo(["test", "-f", pid_file]) + " && " + as_sudo(["pgrep", "-F", pid_file])
daemon_cmd = get_daemon_cmd(params, self.nodeType, "stop")
try:
Execute(daemon_cmd,
user=params.druid_user,
only_if=process_id_exists_command,
)
except:
show_logs(params.druid_log_dir, params.druid_user)
raise
