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Add experimental watchdog

master
andryyy 2017-09-20 10:56:49 +02:00
parent 719aa1a391
commit a8fb1d3f4f
9 changed files with 348 additions and 2 deletions
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22
data/Dockerfiles/watchdog/Dockerfile 100644
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FROM alpine:3.6
LABEL maintainer "André Peters <andre.peters@servercow.de>"
# Installation
RUN apk add --update \
&& apk add --no-cache nagios-plugins-smtp \
nagios-plugins-tcp \
nagios-plugins-http \
nagios-plugins-ping \
curl \
bash \
jq \
fcgi \
nagios-plugins-mysql \
nagios-plugins-dns \
bind-tools
COPY watchdog.sh /watchdog.sh
# Less verbose
CMD /watchdog.sh 2> /dev/null

281
data/Dockerfiles/watchdog/watchdog.sh 100755
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#!/bin/bash
trap "exit" INT TERM
trap "kill 0" EXIT
PARENT_PID=$$
# Prepare
BACKGROUND_TASKS=()
# Skip watchdog?
if [[ "${USE_WATCHDOG}" =~ ^([nN][oO])+$ ]]; then
echo "Skipping watchdog, sleeping..."
sleep 365d
exit 0
fi
# Checks pipe their corresponding container name in this pipe
if [[ ! -p /tmp/com_pipe ]]; then
mkfifo /tmp/com_pipe
fi
# Common functions
progress() {
SERVICE=${1}
TOTAL=${2}
CURRENT=${3}
DIFF=${4}
[[ -z ${DIFF} ]] && DIFF=0
[[ -z ${TOTAL} || -z ${CURRENT} ]] && return
[[ ${CURRENT} -gt ${TOTAL} ]] && return
[[ ${CURRENT} -lt 0 ]] && CURRENT=0
percent=$(( 200 * ${CURRENT} / ${TOTAL} % 2 + 100 * ${CURRENT} / ${TOTAL} ))
completed=$(( ${percent} / 2 ))
remaining=$(( 50 - ${completed} ))
echo -ne "$(date) Health level: "
echo -n "["
printf "%0.s>" $(seq ${completed})
[[ ${remaining} != 0 ]] && printf "%0.s." $(seq ${remaining})
echo -en "] ${percent}% - Service: ${SERVICE}, health trend: "
[[ ${DIFF} =~ ^-[1-9] ]] && echo -en "\e[31mnegative \e[0m" || echo -en "\e[32mpositive \e[0m"
echo "(${DIFF})"
}
# Check functions
nginx_checks() {
err_count=0
diff_c=0
THRESHOLD=16
# Reduce error count by 2 after restarting an unhealthy container
trap "[ ${err_count} -gt 1 ] && err_count=$(( ${err_count} - 2 ))" USR1
while [ ${err_count} -lt ${THRESHOLD} ]; do
err_c_cur=${err_count}
/usr/lib/nagios/plugins/check_ping -H nginx-mailcow -w 2000,10% -c 4000,100% -p2 1>&2; err_count=$(( ${err_count} + $? ))
/usr/lib/nagios/plugins/check_http -H nginx-mailcow -u / -p 8081 1>&2; err_count=$(( ${err_count} + $? ))
sleep $(( ( RANDOM % 30 ) + 10 ))
[ ${err_c_cur} -eq ${err_count} ] && [ ! $((${err_count} - 1)) -lt 0 ] && err_count=$((${err_count} - 1)) diff_c=1
[ ${err_c_cur} -ne ${err_count} ] && diff_c=$(( ${err_c_cur} - ${err_count} ))
progress "Nginx" ${THRESHOLD} $(( ${THRESHOLD} - ${err_count} )) ${diff_c}
done
return 1
}
mysql_checks() {
err_count=0
diff_c=0
THRESHOLD=12
# Reduce error count by 2 after restarting an unhealthy container
trap "[ ${err_count} -gt 1 ] && err_count=$(( ${err_count} - 2 ))" USR1
while [ ${err_count} -lt ${THRESHOLD} ]; do
err_c_cur=${err_count}
/usr/lib/nagios/plugins/check_mysql -H mysql-mailcow -P 3306 -u ${DBUSER} -p ${DBPASS} -d ${DBNAME} 1>&2; err_count=$(( ${err_count} + $? ))
/usr/lib/nagios/plugins/check_mysql_query -H mysql-mailcow -P 3306 -u ${DBUSER} -p ${DBPASS} -d ${DBNAME} -q "SELECT COUNT(*) FROM information_schema.tables" 1>&2; err_count=$(( ${err_count} + $? ))
sleep $(( ( RANDOM % 30 ) + 10 ))
[ ${err_c_cur} -eq ${err_count} ] && [ ! $((${err_count} - 1)) -lt 0 ] && err_count=$((${err_count} - 1)) diff_c=1
[ ${err_c_cur} -ne ${err_count} ] && diff_c=$(( ${err_c_cur} - ${err_count} ))
progress "MySQL/MariaDB" ${THRESHOLD} $(( ${THRESHOLD} - ${err_count} )) ${diff_c}
done
return 1
}
sogo_checks() {
err_count=0
diff_c=0
THRESHOLD=20
# Reduce error count by 2 after restarting an unhealthy container
trap "[ ${err_count} -gt 1 ] && err_count=$(( ${err_count} - 2 ))" USR1
while [ ${err_count} -lt ${THRESHOLD} ]; do
err_c_cur=${err_count}
/usr/lib/nagios/plugins/check_http -H sogo-mailcow -u /WebServerResources/css/theme-default.css -p 9192 -R md-default-theme 1>&2; err_count=$(( ${err_count} + $? ))
/usr/lib/nagios/plugins/check_http -H sogo-mailcow -u /SOGo.index/ -p 20000 -R "SOGo\sGroupware" 1>&2; err_count=$(( ${err_count} + $? ))
/usr/lib/nagios/plugins/check_http -H nginx-mailcow -u /SOGo/ -p 443 --ssl -R "Bad Gateway" --invert-regex 1>&2; err_count=$(( ${err_count} + $? ))
/usr/lib/nagios/plugins/check_http -H nginx-mailcow -u /SOGo/ -p 80 -R "Bad Gateway" --invert-regex 1>&2; err_count=$(( ${err_count} + $? ))
sleep $(( ( RANDOM % 30 ) + 10 ))
[ ${err_c_cur} -eq ${err_count} ] && [ ! $((${err_count} - 1)) -lt 0 ] && err_count=$((${err_count} - 1)) diff_c=1
[ ${err_c_cur} -ne ${err_count} ] && diff_c=$(( ${err_c_cur} - ${err_count} ))
progress "SOGo" ${THRESHOLD} $(( ${THRESHOLD} - ${err_count} )) ${diff_c}
done
return 1
}
postfix_checks() {
err_count=0
diff_c=0
THRESHOLD=16
# Reduce error count by 2 after restarting an unhealthy container
trap "[ ${err_count} -gt 1 ] && err_count=$(( ${err_count} - 2 ))" USR1
while [ ${err_count} -lt ${THRESHOLD} ]; do
err_c_cur=${err_count}
/usr/lib/nagios/plugins/check_smtp -H postfix-mailcow -p 25 1>&2; err_count=$(( ${err_count} + $? ))
/usr/lib/nagios/plugins/check_smtp -H postfix-mailcow -p 588 -f watchdog -C "RCPT TO:null@localhost" -C DATA -C . -R 250 1>&2; err_count=$(( ${err_count} + $? ))
/usr/lib/nagios/plugins/check_smtp -H postfix-mailcow -p 587 -S 1>&2; err_count=$(( ${err_count} + $? ))
sleep $(( ( RANDOM % 30 ) + 10 ))
[ ${err_c_cur} -eq ${err_count} ] && [ ! $((${err_count} - 1)) -lt 0 ] && err_count=$((${err_count} - 1)) diff_c=1
[ ${err_c_cur} -ne ${err_count} ] && diff_c=$(( ${err_c_cur} - ${err_count} ))
progress "Postfix" ${THRESHOLD} $(( ${THRESHOLD} - ${err_count} )) ${diff_c}
done
return 1
}
dovecot_checks() {
err_count=0
diff_c=0
THRESHOLD=24
# Reduce error count by 2 after restarting an unhealthy container
trap "[ ${err_count} -gt 1 ] && err_count=$(( ${err_count} - 2 ))" USR1
while [ ${err_count} -lt ${THRESHOLD} ]; do
err_c_cur=${err_count}
/usr/lib/nagios/plugins/check_smtp -H dovecot-mailcow -p 24 -f "watchdog" -C "RCPT TO:<watchdog@invalid>" -L -R "User doesn't exist" 1>&2; err_count=$(( ${err_count} + $? ))
/usr/lib/nagios/plugins/check_imap -H dovecot-mailcow -p 993 -S -e "OK " 1>&2; err_count=$(( ${err_count} + $? ))
/usr/lib/nagios/plugins/check_imap -H dovecot-mailcow -p 143 -e "OK " 1>&2; err_count=$(( ${err_count} + $? ))
/usr/lib/nagios/plugins/check_tcp -H dovecot-mailcow -p 10001 -e "VERSION" 1>&2; err_count=$(( ${err_count} + $? ))
/usr/lib/nagios/plugins/check_tcp -H dovecot-mailcow -p 4190 -e "Dovecot ready" 1>&2; err_count=$(( ${err_count} + $? ))
sleep $(( ( RANDOM % 30 ) + 10 ))
[ ${err_c_cur} -eq ${err_count} ] && [ ! $((${err_count} - 1)) -lt 0 ] && err_count=$((${err_count} - 1)) diff_c=1
[ ${err_c_cur} -ne ${err_count} ] && diff_c=$(( ${err_c_cur} - ${err_count} ))
progress "Dovecot" ${THRESHOLD} $(( ${THRESHOLD} - ${err_count} )) ${diff_c}
done
return 1
}
phpfpm_checks() {
err_count=0
diff_c=0
THRESHOLD=12
# Reduce error count by 2 after restarting an unhealthy container
trap "[ ${err_count} -gt 1 ] && err_count=$(( ${err_count} - 2 ))" USR1
while [ ${err_count} -lt ${THRESHOLD} ]; do
err_c_cur=${err_count}
cgi-fcgi -bind -connect php-fpm-mailcow:9000 | grep PHP 1>&2; err_count=$(( ${err_count} + ($? * 2)))
/usr/lib/nagios/plugins/check_ping -H php-fpm-mailcow -w 2000,10% -c 4000,100% -p2 1>&2; err_count=$(( ${err_count} + $? ))
/usr/lib/nagios/plugins/check_http -H nginx-mailcow -u /settings.php -p 8081 -r "settings \{" 1>&2; err_count=$(( ${err_count} + ($? * 2)))
sleep $(( ( RANDOM % 30 ) + 10 ))
[ ${err_c_cur} -eq ${err_count} ] && [ ! $((${err_count} - 1)) -lt 0 ] && err_count=$((${err_count} - 1)) diff_c=1
[ ${err_c_cur} -ne ${err_count} ] && diff_c=$(( ${err_c_cur} - ${err_count} ))
progress "PHP-FPM" ${THRESHOLD} $(( ${THRESHOLD} - ${err_count} )) ${diff_c}
done
return 1
}
dns_checks() {
err_count=0
diff_c=0
THRESHOLD=28
# Reduce error count by 2 after restarting an unhealthy container
trap "[ ${err_count} -gt 1 ] && err_count=$(( ${err_count} - 2 ))" USR1
while [ ${err_count} -lt ${THRESHOLD} ]; do
err_c_cur=${err_count}
/usr/lib/nagios/plugins/check_dns -H google.com 1>&2; err_count=$(( ${err_count} + ($? * 2)))
/usr/lib/nagios/plugins/check_dns -s $(dig unbound-mailcow +short A) -H google.com 1>&2; err_count=$(( ${err_count} + ($? * 2)))
/usr/lib/nagios/plugins/check_dns -s $(dig unbound-mailcow +short AAAA) -H google.com 1>&2; err_count=$(( ${err_count} + ($? * 2)))
dig +dnssec org. @172.22.1.254 | grep -E 'flags:.+ad' 1>&2; err_count=$(( ${err_count} + ($? * 2)))
sleep $(( ( RANDOM % 30 ) + 10 ))
[ ${err_c_cur} -eq ${err_count} ] && [ ! $((${err_count} - 1)) -lt 0 ] && err_count=$((${err_count} - 1)) diff_c=1
[ ${err_c_cur} -ne ${err_count} ] && diff_c=$(( ${err_c_cur} - ${err_count} ))
progress "Unbound" ${THRESHOLD} $(( ${THRESHOLD} - ${err_count} )) ${diff_c}
done
return 1
}
# Create watchdog agents
(
while true; do
if ! nginx_checks; then
echo -e "\e[31m$(date) - Nginx hit error limit\e[0m"
echo nginx-mailcow > /tmp/com_pipe
fi
done
) &
BACKGROUND_TASKS+=($!)
(
while true; do
if ! mysql_checks; then
echo -e "\e[31m$(date) - MySQL hit error limit\e[0m"
echo mysql-mailcow > /tmp/com_pipe
fi
done
) &
BACKGROUND_TASKS+=($!)
(
while true; do
if ! phpfpm_checks; then
echo -e "\e[31m$(date) - PHP-FPM hit error limit\e[0m"
echo php-fpm-mailcow > /tmp/com_pipe
fi
done
) &
BACKGROUND_TASKS+=($!)
(
while true; do
if ! sogo_checks; then
echo -e "\e[31m$(date) - SOGo hit error limit\e[0m"
echo sogo-mailcow > /tmp/com_pipe
fi
done
) &
BACKGROUND_TASKS+=($!)
(
while true; do
if ! postfix_checks; then
echo -e "\e[31m$(date) - Postfix hit error limit\e[0m"
echo postfix-mailcow > /tmp/com_pipe
fi
done
) &
BACKGROUND_TASKS+=($!)
(
while true; do
if ! dovecot_checks; then
echo -e "\e[31m$(date) - Dovecot hit error limit\e[0m"
echo dovecot-mailcow > /tmp/com_pipe
fi
done
) &
BACKGROUND_TASKS+=($!)
(
while true; do
if ! dns_checks; then
echo -e "\e[31m$(date) - Unbound hit error limit\e[0m"
echo unbound-mailcow > /tmp/com_pipe
fi
done
) &
BACKGROUND_TASKS+=($!)
# Monitor watchdog agents, stop script when agents fails and wait for respawn by Docker (restart:always:n)
(
while true; do
for bg_task in ${BACKGROUND_TASKS[*]}; do
if ! kill -0 ${bg_task} 21>&2; then
echo "Worker ${bg_task} died, stopping watchdog and waiting for respawn..."
kill -TERM ${PARENT_PID}
fi
sleep 1
done
done
) &
# Restart container when threshold limit reached
while true; do
CONTAINER_ID=
read com_pipe_answer </tmp/com_pipe
if [[ ${com_pipe_answer} =~ .+-mailcow ]]; then
kill -STOP ${BACKGROUND_TASKS[*]}
sleep 3
CONTAINER_ID=$(curl --silent --unix-socket /var/run/docker.sock http/containers/json?all=1 | jq -rc "map(select(.Names[] | contains (\"${com_pipe_answer}\"))) | .[] .Id")
if [[ ! -z ${CONTAINER_ID} ]]; then
echo "Sending restart command to ${CONTAINER_ID}..."
curl --silent --unix-socket /var/run/docker.sock -XPOST http/containers/${CONTAINER_ID}/restart
fi
echo "Wait for restarted container to settle and continue watching..."
sleep 30s
kill -CONT ${BACKGROUND_TASKS[*]}
kill -USR1 ${BACKGROUND_TASKS[*]}
fi
done

2
data/conf/rspamd/dynmaps/index.html 100644
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<html>
</html>

4
data/conf/rspamd/local.d/composites.conf 100644
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@ -0,0 +1,4 @@
MX_IMPLICIT {
expression = "MX_GOOD and MX_MISSING";
score = -0.01;
}

17
data/conf/rspamd/local.d/metrics.conf
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@ -17,3 +17,20 @@ group "bayes" {
description = "Message probably ham, probability: ";
}
}
group "MX" {
symbol "MX_INVALID" {
score = 0.5;
description = "No connectable MX";
one_shot = "true";
}
symbol "MX_MISSING" {
score = 2.0;
description = "No MX record";
one_shot = "true";
}
symbol "MX_GOOD" {
score = -0.01;
description = "MX was ok";
one_shot = "true";
}
}

2
data/conf/rspamd/local.d/mx_check.conf
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@ -1,4 +1,4 @@
timeout = 1.0;
timeout = 8.0;
symbol_bad_mx = "MX_INVALID";
symbol_no_mx = "MX_MISSING";
symbol_good_mx = "MX_GOOD";

17
docker-compose.yml
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@ -307,6 +307,23 @@ services:
volumes:
- /lib/modules:/lib/modules:ro
watchdog-mailcow:
image: mailcow/watchdog:1.0
build: ./data/Dockerfiles/watchdog
init: false
volumes:
- /var/run/docker.sock:/var/run/docker.sock:ro
restart: always
environment:
- DBNAME=${DBNAME}
- DBUSER=${DBUSER}
- DBPASS=${DBPASS}
- USE_WATCHDOG=${USE_WATCHDOG:-n}
networks:
mailcow-network:
aliases:
- watchdog
ipv6nat:
image: robbertkl/ipv6nat
restart: always

3
generate_config.sh
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@ -96,6 +96,9 @@ SKIP_FAIL2BAN=n
# To never run clamd-mailcow
SKIP_CLAMD=n
# Enable watchdog to restart unhealthy containers (experimental)
USE_WATCHDOG=n
EOF
mkdir -p data/assets/ssl

2
update.sh
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@ -4,7 +4,7 @@ for bin in curl docker-compose docker git awk sha1sum; do
if [[ -z $(which ${bin}) ]]; then echo "Cannot find ${bin}, exiting..."; exit 1; fi
done
CONFIG_ARRAY=("SKIP_LETS_ENCRYPT" "SKIP_CLAMD" "SKIP_IP_CHECK" "SKIP_FAIL2BAN" "ADDITIONAL_SAN" "DOVEADM_PORT")
CONFIG_ARRAY=("SKIP_LETS_ENCRYPT" "USE_WATCHDOG" "SKIP_CLAMD" "SKIP_IP_CHECK" "SKIP_FAIL2BAN" "ADDITIONAL_SAN" "DOVEADM_PORT")
echo >> mailcow.conf
for option in ${CONFIG_ARRAY[@]}; do
if [[ ${option} == "ADDITIONAL_SAN" ]]; then