def __init__(self, config, remove_origin=False, debug=False):
self.remove_origin = remove_origin
if remove_origin:
command = 'compress(){ bzip2 -c > "$2" < "$1" && rm -f "$1";}; compress'
else:
command = 'compress(){ bzip2 -c > "$2" < "$1";}; compress'
Command.__init__(self, command, shell=True, check=True, debug=debug)
def __init__(self, config, remove_origin=False, debug=False):
self.remove_origin = remove_origin
if remove_origin:
command = 'compress(){ bzip2 -c > "$2" < "$1" && rm -f "$1";}; compress'
else:
command = 'compress(){ bzip2 -c > "$2" < "$1";}; compress'
Command.__init__(self, command, shell=True, check=True, debug=debug)
def get_remote_status(self):
"""Get the status of the remote server"""
pg_settings = ("archive_mode", "archive_command", "data_directory")
pg_query_keys = ("server_txt_version", "current_xlog")
result = dict.fromkeys(pg_settings + pg_query_keys, None)
try:
with self.pg_connect() as conn:
for name in pg_settings:
result[name] = self.get_pg_setting(name)
try:
cur = conn.cursor()
cur.execute("SELECT version()")
result["server_txt_version"] = cur.fetchone()[0].split()[1]
except:
result["server_txt_version"] = None
try:
cur = conn.cursor()
cur.execute("SELECT pg_xlogfile_name(pg_current_xlog_location())")
result["current_xlog"] = cur.fetchone()[0]
except:
result["current_xlog"] = None
except:
pass
cmd = Command(self.ssh_command, self.ssh_options)
result["last_shipped_wal"] = None
if result["data_directory"] and result["archive_command"]:
archive_dir = os.path.join(result["data_directory"], "pg_xlog", "archive_status")
out = cmd.getoutput(None, "ls", "-tr", archive_dir)[0]
for line in out.splitlines():
if line.endswith(".done"):
name = line[:-5]
if xlog.is_wal_file(name):
result["last_shipped_wal"] = line[:-5]
return result
def get_remote_status(self):
'''Get the status of the remote server'''
pg_settings = ('archive_mode', 'archive_command', 'data_directory')
pg_query_keys = ('server_txt_version', 'current_xlog')
result = dict.fromkeys(pg_settings + pg_query_keys, None)
try:
with self.pg_connect() as conn:
for name in pg_settings:
result[name] = self.get_pg_setting(name)
try:
cur = conn.cursor()
cur.execute("SELECT version()")
result['server_txt_version'] = cur.fetchone()[0].split()[1]
except:
result['server_txt_version'] = None
try:
cur = conn.cursor()
cur.execute('SELECT pg_xlogfile_name(pg_current_xlog_location())')
result['current_xlog'] = cur.fetchone()[0];
except:
result['current_xlog'] = None
except:
pass
cmd = Command(self.ssh_command, self.ssh_options)
result['last_shipped_wal'] = None
if result['data_directory'] and result['archive_command']:
archive_dir = os.path.join(result['data_directory'], 'pg_xlog', 'archive_status')
out = cmd.getoutput(None, 'ls', '-tr', archive_dir)[0]
for line in out.splitlines():
if line.endswith('.done'):
name = line[:-5]
if xlog.is_wal_file(name):
result['last_shipped_wal'] = line[:-5]
return result
def get_remote_status(self):
"""
Retrieve the last archived WAL using a ssh connection on the remote
server and executing an ls command.
:rtype: dict
"""
remote_status = {}
with self.server.pg_connect():
if self.server.server_version < 90400:
remote_status['last_archived_wal'] = None
if self.server.get_pg_setting('data_directory') and \
self.server.get_pg_setting('archive_command'):
# TODO: replace with RemoteUnixCommand
cmd = Command(self.ssh_command,
self.ssh_options)
archive_dir = os.path.join(
self.server.get_pg_setting('data_directory'),
'pg_xlog', 'archive_status')
out = str(cmd.getoutput('ls', '-tr', archive_dir)[0])
for line in out.splitlines():
if line.endswith('.done'):
name = line[:-5]
if xlog.is_any_xlog_file(name):
remote_status['last_archived_wal'] = name
break
return remote_status
def get_remote_status(self):
"""
Get remote information on PostgreSQL using Ssh, such as
last archived WAL file
:rtype: dict(str,str|None)
"""
remote_status = {}
# Retrieve the last archived WAL using a Ssh connection on
# the remote server and executing an 'ls' command. Only
# for pre-9.4 versions of PostgreSQL.
if self.server.postgres.server_version < 90400:
remote_status['last_archived_wal'] = None
if self.server.postgres.get_setting('data_directory') and \
self.server.postgres.get_setting('archive_command'):
# TODO: replace with RemoteUnixCommand
cmd = Command(self.ssh_command,
self.ssh_options,
path=self.server.path)
archive_dir = os.path.join(
self.server.postgres.get_setting('data_directory'),
'pg_xlog', 'archive_status')
out = str(cmd.getoutput('ls', '-tr', archive_dir)[0])
for line in out.splitlines():
if line.endswith('.done'):
name = line[:-5]
if xlog.is_any_xlog_file(name):
remote_status['last_archived_wal'] = name
break
return remote_status
def __init__(self, config, remove_origin=False, debug=False):
if not config.custom_decompression_filter:
raise CompressionIncompatibility("custom_decompression_filter")
self.remove_origin = remove_origin
if remove_origin:
template = 'decompress(){ %s > "$2" < "$1" && rm -f "$1";}; decompress'
else:
template = 'decompress(){ %s > "$2" < "$1";}; decompress'
Command.__init__(self, template % config.custom_decompression_filter, shell=True, check=True, debug=debug)
def __init__(self, config, remove_origin=False, debug=False):
if not config.custom_decompression_filter:
raise CompressionIncompatibility("custom_decompression_filter")
self.remove_origin = remove_origin
if remove_origin:
template = 'decompress(){ %s > "$2" < "$1" && rm -f "$1";}; decompress'
else:
template = 'decompress(){ %s > "$2" < "$1";}; decompress'
Command.__init__(self,
template % config.custom_decompression_filter,
shell=True,
check=True,
debug=debug)
def ssh(server, args):
warn = args.warning
crit = args.critical
from barman.backup_executor import _parse_ssh_command
from barman.command_wrappers import Command
ssh_command, ssh_options = _parse_ssh_command(server.config.ssh_command)
cmd = Command(ssh_command, ssh_options)
(retval, duration) = timed(cmd, 'true')
milliseconds = get_milliseconds(duration)
perfdata_key = "milliseconds"
if retval == 0:
exit_check(milliseconds,
warn,
crit,
"SSH command ran in %sms" % (milliseconds),
perfdata_key=perfdata_key,
perfdata_min=0)
else:
critical(
"Impossible to run a SSH command.",
get_perfdata_str(perfdata_key, milliseconds, warn, crit, 0, None))
def run(self):
"""
Run a a hook script if configured.
This method must never throw any exception
"""
# noinspection PyBroadException
try:
if self.script:
_logger.debug("Attempt to run %s: %s", self.name, self.script)
cmd = Command(self.script,
env_append=self.environment,
path=self.backup_manager.server.path,
shell=True,
check=False)
self.exit_status = cmd()
if self.exit_status != 0:
details = "%s returned %d\n" \
"Output details:\n" \
% (self.script, self.exit_status)
details += cmd.out
details += cmd.err
_logger.warning(details)
else:
_logger.debug("%s returned %d", self.script,
self.exit_status)
return self.exit_status
except Exception as e:
_logger.exception('Exception running %s', self.name)
self.exception = e
return None
def __init__(self, ssh_command, ssh_options=None, path=None):
"""
Uses the same commands as the UnixLocalCommand
but the constructor is overridden and a remote shell is
initialized using the ssh_command provided by the user
:param str ssh_command: the ssh command provided by the user
:param list[str] ssh_options: the options to be passed to SSH
:param str path: the path to be used if provided, otherwise
the PATH environment variable will be used
"""
# Ensure that ssh_option is iterable
if ssh_options is None:
ssh_options = []
if ssh_command is None:
raise FsOperationFailed('No ssh command provided')
self.cmd = Command(ssh_command,
ssh_options,
path=path,
shell=True)
try:
ret = self.cmd("true")
except OSError:
raise FsOperationFailed("Unable to execute %s" % ssh_command)
if ret != 0:
raise FsOperationFailed(
"Connection failed using '%s %s' return code %s" % (
ssh_command,
' '.join(ssh_options),
ret))
def check_ssh(self):
'''Checks SSH connection'''
cmd = Command(self.ssh_command, self.ssh_options)
ret = cmd("true")
if ret == 0:
yield ("\tssh: OK", True)
else:
yield ("\tssh: FAILED (return code: %s)" % (ret, ), False)
def _build_command(self, pipe_command):
"""
Build the command string and create the actual Command object
:param pipe_command: the command used to compress/decompress
:rtype: Command
"""
command = "barman_command(){ "
command += pipe_command
command += ' > "$2" < "$1"'
command += ";}; barman_command"
return Command(command, shell=True, check=True, path=self.path)
def fetch_remote_status(self):
"""
Get remote information on PostgreSQL using Ssh, such as
last archived WAL file
This method does not raise any exception in case of errors,
but set the missing values to None in the resulting dictionary.
:rtype: dict[str, None|str]
"""
remote_status = {}
# Retrieve the last archived WAL using a Ssh connection on
# the remote server and executing an 'ls' command. Only
# for pre-9.4 versions of PostgreSQL.
try:
if self.server.postgres and \
self.server.postgres.server_version < 90400:
remote_status['last_archived_wal'] = None
if self.server.postgres.get_setting('data_directory') and \
self.server.postgres.get_setting('archive_command'):
# TODO: replace with RemoteUnixCommand
# The Command can raise OSError
# if self.ssh_command does not exist.
cmd = Command(self.ssh_command,
self.ssh_options,
path=self.server.path)
archive_dir = os.path.join(
self.server.postgres.get_setting('data_directory'),
'pg_xlog', 'archive_status')
out = str(cmd.getoutput('ls', '-t', archive_dir)[0])
for line in out.splitlines():
if line.endswith('.done'):
name = line[:-5]
if xlog.is_any_xlog_file(name):
remote_status['last_archived_wal'] = name
break
except (PostgresConnectionError, OSError) as e:
_logger.warn("Error retrieving PostgreSQL status: %s", e)
return remote_status
def get_remote_status(self):
'''Get the status of the remote server'''
pg_settings = ('archive_mode', 'archive_command', 'data_directory')
pg_query_keys = ('server_txt_version', 'current_xlog')
result = dict.fromkeys(pg_settings + pg_query_keys, None)
try:
with self.pg_connect() as conn:
for name in pg_settings:
result[name] = self.get_pg_setting(name)
try:
cur = conn.cursor()
cur.execute("SELECT version()")
result['server_txt_version'] = cur.fetchone()[0].split()[1]
except:
result['server_txt_version'] = None
try:
cur = conn.cursor()
cur.execute(
'SELECT pg_xlogfile_name(pg_current_xlog_location())')
result['current_xlog'] = cur.fetchone()[0]
except:
result['current_xlog'] = None
except:
pass
cmd = Command(self.ssh_command, self.ssh_options)
result['last_shipped_wal'] = None
if result['data_directory'] and result['archive_command']:
archive_dir = os.path.join(result['data_directory'], 'pg_xlog',
'archive_status')
out = cmd.getoutput(None, 'ls', '-tr', archive_dir)[0]
for line in out.splitlines():
if line.endswith('.done'):
name = line[:-5]
if xlog.is_wal_file(name):
result['last_shipped_wal'] = line[:-5]
return result
def run_post_backup_script(self, backup_info):
'''
Run the post_backup_script if configured.
This method must never throw any exception
'''
try:
script = self.config.post_backup_script
if script:
_logger.info("Attempt to run post_backup_script: %s", script)
cmd = Command(
script,
env_append=self.build_script_env(backup_info, 'post'),
shell=True, check=False)
ret = cmd()
_logger.info("post_backup_script returned %d", ret)
except Exception:
_logger.exception('Exception running post_backup_script')
def __init__(self, path=None):
# initialize a shell
self.internal_cmd = Command(cmd='sh', args=['-c'], path=path)
def __init__(self, path=None):
# initialize a shell
self.internal_cmd = Command(cmd="sh", args=["-c"], path=path)
def fetch_remote_status(self):
"""
Execute checks for replication-based wal archiving
This method does not raise any exception in case of errors,
but set the missing values to None in the resulting dictionary.
:rtype: dict[str, None|str]
"""
result = dict.fromkeys(
('pg_receivexlog_compatible', 'pg_receivexlog_installed',
'pg_receivexlog_path', 'pg_receivexlog_version'), None)
# Detect a pg_receivexlog executable
pg_receivexlog = utils.which("pg_receivexlog",
self.backup_manager.server.path)
# Test pg_receivexlog existence
if pg_receivexlog:
result["pg_receivexlog_installed"] = True
result["pg_receivexlog_path"] = pg_receivexlog
else:
result["pg_receivexlog_installed"] = False
return result
receivexlog = Command(pg_receivexlog, check=True)
# Obtain the `pg_receivexlog` version
try:
receivexlog("--version")
splitter_version = receivexlog.out.strip().split()
result["pg_receivexlog_version"] = splitter_version[-1]
receivexlog_version = Version(
utils.simplify_version(result["pg_receivexlog_version"]))
except CommandFailedException as e:
receivexlog_version = None
_logger.debug("Error invoking pg_receivexlog: %s", e)
# Retrieve the PostgreSQL versionn
pg_version = None
if self.server.streaming is not None:
pg_version = self.server.streaming.server_major_version
# If one of the version is unknown we cannot compare them
if receivexlog_version is None or pg_version is None:
return result
# pg_version is not None so transform into a Version object
# for easier comparison between versions
pg_version = Version(pg_version)
# pg_receivexlog 9.2 is compatible only with PostgreSQL 9.2.
if "9.2" == pg_version == receivexlog_version:
result["pg_receivexlog_compatible"] = True
# other versions are compatible with lesser versions of PostgreSQL
# WARNING: The development versions of `pg_receivexlog` are considered
# higher than the stable versions here, but this is not an issue
# because it accepts everything that is less than
# the `pg_receivexlog` version(e.g. '9.6' is less than '9.6devel')
elif "9.2" < pg_version <= receivexlog_version:
result["pg_receivexlog_compatible"] = True
else:
result["pg_receivexlog_compatible"] = False
return result
def __init__(self, path=None):
# initialize a shell
self.cmd = Command(cmd='sh -c', shell=True, path=path)
