def __is_active_master():
"""
Finds if this node is the active master
"""
import params
return params.hostname == common.get_local_hawq_site_property(
"hawq_master_address_host")
def __is_standby_host():
"""
Finds if this node is the standby host
"""
import params
return params.hostname == common.get_local_hawq_site_property(
"hawq_standby_address_host")
def get_pid_file():
"""
Fetches the pid file, which will be used to get the status of the HAWQ Master, Standby
or Segments
"""
config = Script.get_config()
component_name = config['componentName']
component = "master" if component_name in ["HAWQMASTER", "HAWQSTANDBY"] else "segment"
hawq_pid_file = os.path.join(hawq_constants.hawq_pid_dir, "hawq-{0}.pid".format(component))
File(hawq_pid_file, action='delete')
utils.create_dir_as_hawq_user(hawq_constants.hawq_pid_dir)
#Get hawq_master_directory or hawq_segment_directory value from hawq-site.xml depending
#on the component
hawq_site_directory_property = "hawq_{0}_directory".format(component)
#hawq-site content from Ambari server will not be available when the
#command type is STATUS_COMMAND. Hence, reading it directly from the local file
postmaster_pid_file = os.path.join(common.get_local_hawq_site_property(
hawq_site_directory_property), hawq_constants.postmaster_pid_filename)
pid = ""
if os.path.exists(postmaster_pid_file):
with open(postmaster_pid_file, 'r') as fh:
pid = fh.readline().strip()
if not pid:
raise Fail("Failed to fetch pid from {0}".format(postmaster_pid_file))
File(hawq_pid_file, content=pid, owner=hawq_constants.hawq_user, group=hawq_constants.hawq_user)
return hawq_pid_file
def get_pid_file():
"""
Fetches the pid file, which will be used to get the status of the HAWQ Master, Standby
or Segments
"""
config = Script.get_config()
component_name = config['componentName']
component = "master" if component_name in ["HAWQMASTER", "HAWQSTANDBY"] else "segment"
hawq_pid_file = os.path.join(hawqconstants.hawq_pid_dir, "hawq-{0}.pid".format(component))
File(hawq_pid_file, action='delete')
utils.create_dir_as_hawq_user(hawqconstants.hawq_pid_dir)
#Get hawq_master_directory or hawq_segment_directory value from hawq-site.xml depending
#on the component
hawq_site_directory_property = "hawq_{0}_directory".format(component)
#hawq-site content from Ambari server will not be available when the
#command type is STATUS_COMMAND. Hence, reading it directly from the local file
postmaster_pid_file = os.path.join(common.get_local_hawq_site_property(
hawq_site_directory_property), hawqconstants.postmaster_pid_filename)
pid = ""
if os.path.exists(postmaster_pid_file):
with open(postmaster_pid_file, 'r') as fh:
pid = fh.readline().strip()
if not pid:
raise Fail("Failed to fetch pid from {0}".format(postmaster_pid_file))
File(hawq_pid_file, content=pid, owner=hawqconstants.hawq_user, group=hawqconstants.hawq_user)
return hawq_pid_file
def __get_standby_host():
"""
Returns the name of the HAWQ Standby Master host from hawq-site.xml, or None if no standby is configured
"""
standby_host = common.get_local_hawq_site_property(
"hawq_standby_address_host")
return None if standby_host is None or standby_host.lower(
) == 'none' else standby_host
def __init__(self):
self.active_master_host = common.get_local_hawq_site_property("hawq_master_address_host")
def __init__(self):
self.active_master_host = common.get_local_hawq_site_property(
"hawq_master_address_host")