Supervisord
Supervisord可以通过sudo easy_install supervisor安装，当然也可以通过Supervisord官网下载后解压并转到源码所在的文件夹下执行setup.py install来安装。
使用easy_install必须安装setuptools打开https://pypi.org/project/setuptools/#files
或者
- 安装easy_install
sudo yum install python-setuptools-devel 2. 安装Supervisor
easy_install supervisor 3. 生成配置文件
echo_supervisord_conf > /etc/supervisord.conf
安装完有两个可执行文件 supervisorctl supervisord
配置文件
/etc/supervisord.conf
启动
/usr/bin/supervisord -c /etc/supervisord.conf
配置文件示例
[unix_http_server]
file=/dev/shm/supervisor.sock ; (the path to the socket file)
[supervisord]
logfile=/tmp/supervisord.log ; (main log file;default $CWD/supervisord.log)
logfile_maxbytes=50MB ; (max main logfile bytes b4 rotation;default 50MB)
logfile_backups=10 ; (num of main logfile rotation backups;default 10)
loglevel=info ; (log level;default info; others: debug,warn,trace)
pidfile=/tmp/supervisord.pid ; (supervisord pidfile;default supervisord.pid)
nodaemon=false ; (start in foreground if true;default false)
minfds=1024 ; (min. avail startup file descriptors;default 1024)
minprocs=200 ; (min. avail process descriptors;default 200)
user=root ;
; the below section must remain in the config file for RPC
; (supervisorctl/web interface) to work, additional interfaces may be
; added by defining them in separate rpcinterface: sections
[rpcinterface:supervisor]
supervisor.rpcinterface_factory = supervisor.rpcinterface:make_main_rpcinterface
[supervisorctl]
serverurl=unix:///dev/shm/supervisor.sock ; use a unix:// URL for a unix socket
[program:php-fpm]
command = /usr/local/sbin/php-fpm --nodaemonize --fpm-config /usr/local/etc/php-fpm.d/www.conf
autostart=true
autorestart=true
priority=5
stdout_logfile=/dev/stdout
stdout_logfile_maxbytes=0
stderr_logfile=/dev/stderr
stderr_logfile_maxbytes=0
[program:nginx]
command=/usr/sbin/nginx -g "daemon off; error_log /dev/stderr info;"
autostart=true
autorestart=true
priority=10
stdout_events_enabled=true
stderr_events_enabled=true
stdout_logfile=/dev/stdout
stdout_logfile_maxbytes=0
stderr_logfile=/dev/stderr
stderr_logfile_maxbytes=0
[program:crond]
command=/usr/sbin/crond -f
numprocs=1
autostart=true
autorestart=true
priority=5
startsecs=5
startretries=3
stdout_events_enabled=true
stderr_events_enabled=true
stdout_logfile=/dev/stdout
stdout_logfile_maxbytes=0
stderr_logfile=/dev/stderr
stderr_logfile_maxbytes=0
[include]
files = /etc/supervisor/conf.d/*.conf
参考 http://www.cnblogs.com/jasonkoo/articles/3750638.html
supervisorctl 控制命令
supervisorctl start programxxx
supervisorctl stop programxxx
supervisorctl restart programxxx
supervisorctl stop all 停止全部进程，注：start、restart、stop都不会载入最新的配置文件。
supervisorctl reload 载入最新的配置文件，并按新的配置启动、管理所有进程。
supervisord 目前不支持 Python 3,必须是需要python2
类似工具 https://mmonit.com/monit/
一个简单的配置/etc/monitrc
set daemon 30
set log /var/log/monit.log
set httpd unixsocket /var/run/monit.sock allow user:pass
set daemon 30
set log /var/log/monit.log
set httpd unixsocket /var/run/monit.sock allow user:pass
check process crond with matching crond
start program = "/usr/local/bin/crond" with timeout 10 seconds
stop program = "/usr/local/bin/busybox killall crond" with timeout 10 seconds
可以使用 monit procmatch pattern 来查看规则匹配到的所有进程
process matching 匹配到多个，monit 会选择 uptime 最大的那个处理。
配置文件的权限需要是 700 否则报错The control file '/etc/monitrc' permission 0644 is wrong, maximum 0700 allowed
set daemon 30
set log /var/log/monit.log
set httpd unixsocket /var/run/monit.sock allow user:pass
check process crond with matching crond
start program = "/usr/local/bin/crond" with timeout 10 seconds
stop program = "/usr/local/bin/busybox killall crond" with timeout 10 seconds
check process redis-server with pidfile /var/run/redis-server.pid
start program = "/usr/local/bin/redis-server /etc/redis.conf"
stop program = "/usr/local/bin/busybox killall redis-server"
if failed port 6379 then restart
监控 mysql-server
check process mysql with pidfile /run/mysqld/mysqld.pid
start program = "/usr/sbin/service mysql start" with timeout 60 seconds
stop program = "/usr/sbin/service mysql stop"
if failed unixsocket /var/run/mysqld/mysqld.sock then restart
发现进程挂了以后发送通知
set daemon 30
set log /var/log/monit.log
set httpd unixsocket /var/run/monit.sock allow user:pass
check process webpack matching webpack
if does not exist then exec "/usr/bin/curl -sL https://xx.send?text=!~~"
对于非后台进程需要&
set daemon 5
set log /var/log/monit.log
set httpd unixsocket /var/run/monit.sock allow user:pass
check process webpack matching sleep
start program = "/bin/sh -c 'sleep 40 &'" with timeout 3 seconds
stop program = "/bin/sh -c 'pkill -f sleep'" with timeout 10 seconds
https://github.com/logrotate/logrotate
alpine 中
apk add logrotate
配置文件
/etc/logrotate.conf
示例配置文件
# see "man logrotate" for details
# rotate log files weekly
weekly
# keep 4 weeks worth of backlogs
rotate 4
# create new (empty) log files after rotating old ones
create
# use date as a suffix of the rotated file
dateext
# exclude alpine files
tabooext + .apk-new
# uncomment this if you want your log files compressed
compress
# main log file
/var/log/messages {}
# apk packages drop log rotation information into this directory
include /etc/logrotate.d
# system-specific logs may be also be configured here.
/etc/logrotate.d 下可以存放各个程序的配置
/etc/logrotate.d/nginx
/var/www/html/logs/*.log {
create 0644 nginx nginx
daily
rotate 999
missingok
notifempty
compress
sharedscripts
postrotate
/bin/kill -USR1 `cat /var/run/nginx.pid 2>/dev/null` 2>/dev/null || true
endscript
}
/var/log/influxdb/influxd.log {
daily
rotate 7
missingok
dateext
copytruncate
compress
}
logrotate 只是做日期切割，具体的执行还依赖crontab
一般安装好logrotate后，就会创建crontab的配置 , 创建的文件位于 /etc/periodic/daily/
/etc/periodic/daily/logrotate
#!/bin/sh
if [ -f /etc/conf.d/logrotate ]; then
. /etc/conf.d/logrotate
fi
if [ -x /usr/bin/cpulimit ] && [ -n "$CPULIMIT" ]; then
_cpulimit="/usr/bin/cpulimit --limit=$CPULIMIT"
fi
$_cpulimit /usr/sbin/logrotate /etc/logrotate.conf
EXITVALUE=$?
if [ $EXITVALUE != 0 ]; then
/usr/bin/logger -t logrotate "ALERT exited abnormally with [$EXITVALUE]"
fi
exit 0
同时 corntab 里包含
# do daily/weekly/monthly maintenance
# min hour day month weekday command
*/15 * * * * run-parts /etc/periodic/15min
0 * * * * run-parts /etc/periodic/hourly
0 2 * * * run-parts /etc/periodic/daily
0 3 * * 6 run-parts /etc/periodic/weekly
0 5 1 * * run-parts /etc/periodic/m
crontab 的规则位于 /var/spool/cron/crontabs ， 以用户名为文件
crond 也需要常驻内存，logrotate 才能工作。
crond 默认的配置目录就是 /var/spool/cron/crontabs , 没有此目录,则无法运行
alpine 中直接 crond 就可以后台运行， crond -f 则前台运行
syslogd 后台运行，并将日志存储于 /var/log/messages
BusyBox v1.24.2 (2017-01-18 14:13:46 GMT) multi-call binary.
Usage: syslogd [OPTIONS]
System logging utility
-n Run in foreground
-R HOST[:PORT] Log to HOST:PORT (default PORT:514)
-L Log locally and via network (default is network only if -R)
-C[size_kb] Log to shared mem buffer (use logread to read it)
-K Log to kernel printk buffer (use dmesg to read it)
-O FILE Log to FILE (default:/var/log/messages, stdout if -)
-s SIZE Max size (KB) before rotation (default:200KB, 0=off)
-b N N rotated logs to keep (default:1, max=99, 0=purge)
-l N Log only messages more urgent than prio N (1-8)
-S Smaller output
-D Drop duplicates
-f FILE Use FILE as config (default:/etc/syslog.conf)
BusyBox v1.27.1 (2017-07-18 19:24:44 CEST) multi-call binary.
Usage: crond -fbS -l N -d N -L LOGFILE -c DIR
-f Foreground
-b Background (default)
-S Log to syslog (default)
-l N Set log level. Most verbose 0, default 8
-d N Set log level, log to stderr
-L FILE Log to FILE
-c DIR Cron dir. Default:/var/spool/cron/crontabs
新版busybox 1.27 中 crond 执行的任务命令ps aux 已经查看不到了, 但是通过日志可以看到实际是运行了.
syslogd -C1024 启动的，使用 logread 获取日志
在 alpine中 在crond 默认的日志是输出到syslogd的
BusyBox v1.27.2 (2017-11-01 22:58:00 UTC) multi-call binary.
Usage: crond -fbS -l N -d N -L LOGFILE -c DIR
-f Foreground
-b Background (default)
-S Log to syslog (default)
-l N Set log level. Most verbose 0, default 8
-d N Set log level, log to stderr
-L FILE Log to FILE
-c DIR Cron dir. Default:/var/spool/cron/crontabs
启动crond,必须创建文件夹/var/spool/cron/crontabs 或者指定一个已存在文件夹。
crond 启动以后，配置文件直接写在 /var/spool/cron/crontabs
文件修改后无需干预,自动生效。
此文件夹下的同名文件就是执行crond里命令的用户，例如 root 的 cron配置 www-data 的cron配置等。
syslogd 启动以后默认是使用IPC通信的. 建立 /dev/log socket 文件.
可执行程序 logger 便可向syslogd 发送日志消息。
如果没有/dev/log 或者 syslogd 未运行，logger将静默忽略