def list_(self):
"""
List installed packages on host
Returns:
list: Installed packages
Raises:
NotImplementedError, CommandExecutionFailure
"""
if not self.list_command_d:
raise NotImplementedError(
"There is no 'list_' command defined."
)
cmd = self.list_command_d
self.logger.debug(
"Getting all instaled packages from host %s", self.host
)
rc, out, err = self.host.executor().run_cmd(cmd)
if not rc:
return out.split('\n')
self.logger.error(
"Failed to get installed packages on host %s, rc: %s, err: %s",
self.host, rc, err
)
raise errors.CommandExecutionFailure(
cmd=cmd, executor=self.host.executor, rc=rc, err=err
)
def wget(self, url, output_file, progress_handler=None):
"""
Download file on the host from given url
Args:
url (str): url to file
output_file (str): full path to output file
progress_handler (func): progress handler function
Returns:
str: absolute path to file
"""
rc = None
host_executor = self.host.executor()
cmd = ["wget", "-O", output_file, "--no-check-certificate", url]
with host_executor.session() as host_session:
wget_command = host_session.command(cmd)
with wget_command.execute() as (_, _, stderr):
counter = 0
while rc is None:
line = stderr.readline()
if counter == 1000 and progress_handler:
progress_handler(line)
counter = 0
counter += 1
rc = wget_command.get_rc()
if rc:
raise errors.CommandExecutionFailure(
host_executor, cmd, rc,
"Failed to download file from url {0}".format(url))
return output_file
def _exec_command(self, cmd):
host_executor = self.host.executor()
rc, out, err = host_executor.run_cmd(cmd)
if rc:
raise errors.CommandExecutionFailure(cmd=cmd,
executor=host_executor,
rc=rc,
err=err)
return out
def _exec_command(self, cmd, err_msg=None):
host_executor = self.host.executor()
rc, out, err = host_executor.run_cmd(cmd)
if err_msg:
err = "{err_msg}: {err}".format(err_msg=err_msg, err=err)
if rc:
raise errors.CommandExecutionFailure(
executor=host_executor, cmd=cmd, rc=rc, err=err
)
return out
def get_release_info(self):
"""
/etc/os-release became to be standard on systemd based operating
systems.
It might raise exception in case the systemd is not deployed on system.
Raises:
UnsupportedOperation
"""
os_release_file = '/etc/os-release'
cmd = ['cat', os_release_file]
executor = self.host.executor()
rc, out, err = executor.run_cmd(cmd)
if rc:
try:
if not self.host.fs.exists(os_release_file):
raise errors.UnsupportedOperation(
self.host, "OperatingSystem.release_info",
"Requires 'systemd' based operating system.",
)
except errors.UnsupportedOperation:
raise
except Exception:
pass
raise errors.CommandExecutionFailure(
executor, cmd, rc,
"Failed to obtain release info, system doesn't follow "
"systemd standards: {0}".format(err)
)
release_info = dict()
for line in out.strip().splitlines():
values = line.split("=", 1)
if len(values) != 2:
continue
release_info[values[0].strip()] = values[1].strip(" \"'")
return release_info