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Updates to confluent_selfcheck

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Reap ssh-agent to avoid stale agents lying around.

Remove nuisance warnings about virbr0 when present.

Do a full runthrough as the confluent user to ssh to a node when user
requests with '-a', marking known_hosts and automation key issues.
This commit is contained in:
Jarrod Johnson 2024-03-14 10:50:01 -04:00
parent 17af9c74b8
commit 58d9bc1816
1 changed files with 34 additions and 0 deletions
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34
confluent_server/bin/confluent_selfcheck
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@ -22,6 +22,8 @@ import shutil
import eventlet.green.socket as socket
import eventlet
import greenlet
import pwd
import signal
def fprint(txt):
sys.stdout.write(txt)
@ -109,6 +111,8 @@ def nics_missing_ipv6():
iname, state = comps[:2]
if iname == b'lo':
continue
if iname == b'virbr0':
continue
addrs = comps[2:]
hasv6 = False
hasv4 = False
@ -157,6 +161,7 @@ def lookup_node(node):
if __name__ == '__main__':
ap = argparse.ArgumentParser(description='Run configuration checks for a system running confluent service')
ap.add_argument('-n', '--node', help='A node name to run node specific checks against')
ap.add_argument('-a', '--automation', help='Do checks against a deployed node for automation and syncfiles function', action='store_true')
args, extra = ap.parse_known_args(sys.argv)
if len(extra) > 1:
ap.print_help()
@ -217,6 +222,7 @@ if __name__ == '__main__':
print('OK')
except subprocess.CalledProcessError:
emprint('Failed to load confluent automation key, syncfiles and profile ansible plays will not work (Example resolution: osdeploy initialize -a)')
os.kill(int(sshutil.agent_pid), signal.SIGTERM)
fprint('Checking for blocked insecure boot: ')
if insecure_boot_attempts():
emprint('Some nodes are attempting network boot using PXE or HTTP boot, but the node is not configured to allow this (Example resolution: nodegroupattrib everything deployment.useinsecureprotocols=firmware)')
@ -311,6 +317,34 @@ if __name__ == '__main__':
emprint('Name resolution failed for node, it is normally a good idea for the node name to resolve to an IP')
if result:
print("OK")
if args.automation:
print(f'Checking confluent automation access to {args.node}...')
child = os.fork()
if child > 0:
pid, extcode = os.waitpid(child, 0)
else:
sshutil.ready_keys = {}
sshutil.agent_pid = None
cuser = pwd.getpwnam('confluent')
os.setgid(cuser.pw_gid)
os.setuid(cuser.pw_uid)
sshutil.prep_ssh_key('/etc/confluent/ssh/automation')
srun = subprocess.run(
['ssh', '-Tn', '-o', 'BatchMode=yes', '-l', 'root',
'-o', 'StrictHostKeyChecking=yes', args.node, 'true'],
stdin=subprocess.DEVNULL, stderr=subprocess.PIPE)
os.kill(int(sshutil.agent_pid), signal.SIGTERM)
if srun.returncode == 0:
print(f'Confluent automation access to {args.node} seems OK')
else:
if b'Host key verification failed' in srun.stderr:
emprint('Confluent ssh unable to verify host key, check /etc/ssh/ssh_known_hosts. (Example resolution: osdeploy initialize -k)')
elif b'ermission denied' in srun.stderr:
emprint('Confluent user unable to ssh in, check /root/.ssh/authorized_keys on the target system versus /etc/confluent/ssh/automation.pub (Example resolution: osdeploy initialize -a)')
else:
emprint('Unknown error attempting confluent automation ssh:')
sys.stderr.buffer.write(srun.stderr)
os.kill(int(sshutil.agent_pid), signal.SIGTERM)
else:
print("Skipping node checks, no node specified (Example: confluent_selfcheck -n n1)")
# possible checks: