Replace freshness and kernel_version checks

Use an updated plugin from BLSE that uses needrestart instead of manual
parsing of these elements.
This commit is contained in:
Joshua Boniface 2022-05-17 14:41:06 -04:00
parent 0a8b1bfa6e
commit 8f28decfe2
3 changed files with 98 additions and 62 deletions

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@ -1,52 +1,103 @@
#!/bin/bash
#!/usr/bin/env python
# Open file handle freshness check for Check_MK
# Installed by PVC ansible
# Check for freshness of various components using needrestart
OK=0
WARNING=1
import subprocess
import re
import json
FRESHNESS="$( lsof -Fcftn / 2>/dev/null | grep -v '/tmp' | \
awk '
{
field=substr($0,1,1);
data=substr($0,2);
if (field=="f") {
file_descriptor=data;
} else if (field=="t") {
file_type=data;
} else if (field=="c") {
command_name=data;
} else if (field=="n" && file_descriptor=="DEL" && file_type=="REG") {
name=data;
file[command_name]++;
}
try:
nrout = subprocess.run(["/usr/sbin/needrestart", "-b"], timeout=5, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
except subprocess.TimeoutExpired:
exit(2)
except Exception:
exit(1)
stdout = nrout.stdout.decode("ascii").split('\n')
stderr = nrout.stdout.decode("ascii").split('\n')
# Output data structure after parsing needrestart output
data = {
'kernel': {
'current': None,
'pending': None,
'state': 0,
},
'microcode': {
'current': None,
'pending': None,
'state': 0,
},
'services': {
'count': 0,
'list': list(),
},
'containers': {
'count': 0,
'list': list(),
},
'sessions': {
'count': 0,
'list': list(),
},
}
END {
for (name in file) {
error++;
# Skip these problematic programs
if (name=="systemd-udevd") { continue; }
if (name=="pulseaudio") { continue; }
if (name=="light-locker") { continue; }
if (name=="at-spi-bus-laun") { continue; }
if (name=="node") { continue; }
if (error_name) { error_name=error_name " " };
error_name=error_name name;
}
if (error_name) {
print error_name;
exit error;
} else {
exit;
}
}' )";
echo "<<<freshness>>>"
if [ "$FRESHNESS" ]; then
echo "Applications needing restart: $FRESHNESS"
exit $WARNING
else
echo "No applications needing restart"
exit $OK
fi
# NEEDRESTART-VER: 3.4
# NEEDRESTART-KCUR: 4.19.0-6-amd64
# NEEDRESTART-KEXP: 4.19.0-20-amd64
# NEEDRESTART-KSTA: 3
# NEEDRESTART-UCSTA: 2
# NEEDRESTART-UCCUR: 0xb000038
# NEEDRESTART-UCEXP: 0xb000040
# NEEDRESTART-SVC: acpid
# NEEDRESTART-SVC: cron
# NEEDRESTART-SVC: irqbalance
# NEEDRESTART-SVC: mcelog
# NEEDRESTART-SVC: munin-node
# NEEDRESTART-SVC: ntp
# NEEDRESTART-SVC: ssh
# NEEDRESTART-SVC: syslog-ng
# NEEDRESTART-SVC: trousers
# NEEDRESTART-SVC: watchdog
# NEEDRESTART-SVC: wd_keepalive
# NEEDRESTART-CONT: LXC web1
# NEEDRESTART-SESS: metabase @ user manager service
# NEEDRESTART-SESS: root @ session #28017
# STA:
# 0: unknown or failed to detect
# 1: no pending upgrade
# 2: ABI compatible upgrade pending
# 3: version upgrade pending
for line in stdout:
# Kernel version
if re.match(r'^NEEDRESTART-KSTA', line):
data['kernel']['state'] = int(line.split(': ')[-1])
elif re.match(r'^NEEDRESTART-KCUR', line):
data['kernel']['current'] = line.split(': ')[-1]
elif re.match(r'^NEEDRESTART-KEXP', line):
data['kernel']['pending'] = line.split(': ')[-1]
# Microcode version
elif re.match(r'^NEEDRESTART-UCSTA', line):
data['microcode']['state'] = int(line.split(': ')[-1])
elif re.match(r'^NEEDRESTART-UCCUR', line):
data['microcode']['current'] = line.split(': ')[-1]
elif re.match(r'^NEEDRESTART-UCEXP', line):
data['microcode']['pending'] = line.split(': ')[-1]
# Services needing restart
elif re.match(r'^NEEDRESTART-SVC', line):
data['services']['count'] += 1
data['services']['list'].append(' '.join(line.split(': ')[1:]))
# Containers needing restart
elif re.match(f'^NEEDRESTART-CONT', line):
data['containers']['count'] += 1
data['containers']['list'].append(' '.join(line.split(': ')[1:]))
# Sessions needing restart
elif re.match(f'^NEEDRESTART-SESS', line):
data['sessions']['count'] += 1
data['sessions']['list'].append(' '.join(line.split(': ')[1:]))
print("<<<freshness>>>")
print(json.dumps(data))
exit(0)

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@ -1,14 +0,0 @@
#!/bin/bash
OK=0
WARNING=1
echo "<<<kernelversion>>>"
ACTIVE="$( uname -v | awk '{ print $4" "$5 }' )"
ONDISK="$( strings /vmlinuz | grep 'Debian' | head -1 | awk '{ print $6" "$7 }' )"
echo ${ACTIVE}
echo ${ONDISK}
if [[ ${ACTIVE} != ${ONDISK} ]]; then
exit $WARNING
else
exit $OK
fi

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@ -619,7 +619,6 @@
- entropy
- freshness
- ipmi
- kernelversion
- ownership
tags: base-cmkagent