Saltstack接触了一段时间,感觉saltstack的强项在于状态文件的部署,可以为我们节省大量的批量部署时间。今天我就以我的前端转发服务器的部署为例来部署nginx;水平有限。希望大家多多指导。
想法:
1.用grains收集cpu,打开文件数等信息,用jinja配置nginx.conf文件。
2.用pillar保存我们要用的变量,用jinja配置vhost.conf文件。
3.状态安装推送文件
部署步骤:
1.写颗粒,根据系统打开文件的数量配置合理数量的nginx打开文件:
[root@mail nginx]# cd /srv/salt/_grains/ [root@mail _grains]# cat nginx_config.py import os,sys,commands def NginxGrains(): grains ={} max_open_file=65536 #Worker_info={'cpus2':'01 10','cpus4':'1000 0100 0010 0001','cpus8':'10000000 01000000 00100000 00010000 00001000 00000100 00000010 00000001'} try: getulimit=commands.getstatusoutput('source /etc/profile;ulimit -n') except Exception,e: pass if getulimit[0]==0: max_open_file=int(getulimit[1]) grains['max_open_file'] = max_open_file return grains if __name__ == '__main__': print NginxGrains() 推送文件到客户端并启动文件重启客户端生效: salt '*' saltutil.sync_all salt '*' sys.reload_modules2.写变量的支柱。这里我定义了域名和后端转发主机:
[root@mail pillar]# cat top.sls base: '*': - vhost [root@mail pillar]# cat vhost.sls hostname: www.huasuan.com pass: 192.168.10.1003.写入所有文件的状态,首先检查目录选项:
[root@mail salt]# tree nginx nginx ├── conf.sls ├── files │?? ├── nginx │?? ├── nginx-1.6.0.tar.gz │?? ├── nginx.conf │?? └── huasuan.conf ├── init.sls ├── install.sls ├── server.sls └── vhost.sls 注释:init.sls指定启用哪个入口选项,install.sls指定安装步骤,server.sls表示管理服务脚本, conf.sls指定管理配置文件nginx.conf,vhost.sls 指定管理vhost.sls目录下的虚拟主机。4.检查顶层文件和初始化文件:
[root@mail nginx]# cat install.sls [root@mail salt]# cat top.sls base: '*': - nginx [root@mail salt]# cat nginx/init.sls include: - nginx.install - nginx.conf - nginx.server - nginx.vhost5.安装Install,sls文件:
#nginx.tar.gz nginx_source: file.managed: - name: /tmp/nginx-1.6.0.tar.gz - unless: test -e /tmp/nginx-1.6.0.tar.gz - source: salt://nginx/files/nginx-1.6.0.tar.gz #extract extract_nginx: cmd.run: - cwd: /tmp - names: - tar zxvf nginx-1.6.0.tar.gz - unless: test -d /tmp/nginx-1.6.0 - require: - file: nginx_source #user nginx_user: user.present: - name: nginx - uid: 1501 - createhome: False - gid_from_name: True - shell: /sbin/nologin #nginx_pkgs nginx_pkg: pkg.installed: - pkgs: - gcc - openssl-devel - pcre-devel - zlib-devel #nginx_compile nginx_compile: cmd.run: - cwd: /tmp/nginx-1.6.0 - names: - ./configure --prefix=/usr/local/nginx --user=nginx --group=nginx --with-http_ssl_module --with-http_gzip_static_module --http-client-body-temp-path=/usr/local/nginx/client/ --http-proxy-temp-path=/usr/local/nginx/proxy/ --http-fastcgi-temp-path=/usr/local/nginx/fcgi/ --with-poll_module --with-file-aio --with-http_realip_module --with-http_addition_module --with-http_random_index_module --with-pcre --with-http_stub_status_module - make - make install - require: - cmd: extract_nginx - pkg: nginx_pkg - unless: test -d /usr/local/nginx #cache_dir cache_dir: cmd.run: - names: - mkdir -p /usr/local/nginx/{client,proxy,fcgi} && chown -R nginx.nginx /usr/local/nginx/ - mkdir -p /usr/local/nginx/conf/vhost && chown -R nginx.nginx /usr/local/nginx/conf/vhost - unless: test -d /usr/local/nginx/client/ - require: - cmd: nginx_compile 注释:nginx使用源码编译安装的方式,包括了文件包推送,解压、安装管理,主要核心是cmd的使用6.管理配置文件conf.sls:
[root@mail nginx]# cat conf.sls include: - nginx.install nginx_service: file.managed: - name: /usr/local/nginx/conf/nginx.conf - user: nginx - mode: 644 - source: salt://nginx/files/nginx.conf - template: jinja service.running: - name: nginx - enable: True - reload: True - watch: - file: /usr/local/nginx/conf/nginx.conf7.服务脚本启动文件管理服务器.sls:
[root@mail nginx]# cat server.sls include: - nginx.install server: file.managed: - name: /etc/init.d/nginx - user: root - mode: 755 - source: salt://nginx/files/nginx service.running: - name: nginx - enable: True - reload: True - watch: - file: /etc/init.d/nginx command: cmd.run: - names: - /sbin/chkconfig --add nginx - /sbin/chkconfig nginx on - unless: /sbin/chkconfig --list nginx8.虚拟主机管理配置文件:vhost.sls
[root@mail nginx]# cat vhost.sls include: - nginx.install vhostconfig: file.managed: - name: /usr/local/nginx/conf/vhost/huasuan.conf - user: root - mode: 644 - source: salt://nginx/files/huasuan.conf - template: jinja service.running: - name: nginx - enable: True - reload: True - watch: - file: /usr/local/nginx/conf/vhost/huasuan.conf以上是将已经保存在files目录下的配置文件推送到客户端,都是使用jinja模板使用系统的grains和pillar变量:
9.分别检查以下配置文件nginx.conf:
# For more information on configuration, see: user nginx; worker_processes {{ grains['num_cpus'] }}; {% if grains['num_cpus'] == 2 %} worker_cpu_affinity 01 10; {% elif grains['num_cpus'] == 4 %} worker_cpu_affinity 1000 0100 0010 0001; {% elif grains['num_cpus'] >= 8 %} worker_cpu_affinity 00000001 00000010 00000100 00001000 00010000 00100000 01000000 10000000; {% else %} worker_cpu_affinity 1000 0100 0010 0001; {% endif %} worker_rlimit_nofile {{ grains['max_open_file'] }}; error_log /var/log/nginx/error.log; #error_log /var/log/nginx/error.log notice; #error_log /var/log/nginx/error.log info; pid /var/run/nginx.pid; events { worker_connections {{ grains['max_open_file'] }}; } http { include mime.types; default_type application/octet-stream; charset utf-8; server_names_hash_bucket_size 128; client_header_buffer_size 32k; large_client_header_buffers 4 32k; client_max_body_size 128m; sendfile on; tcp_nopush on; keepalive_timeout 60; tcp_nodelay on; server_tokens off; client_body_buffer_size 512k; gzip on; gzip_min_length 1k; gzip_buffers 4 16k; gzip_http_version 1.1; gzip_comp_level 2; gzip_types text/plain application/x-javascript text/css application/xml; gzip_vary on; log_format main '$remote_addr - $remote_user [$time_local] "$request" ' '$status $body_bytes_sent "$http_referer" ' '"$http_user_agent" "$http_x_forwarded_for" "$host"' ; include vhost/*.conf; } 注释:grains['max_open_file']这个变量由我们第一个创建的自定义grains收集到服务端,基于jinja 来返回客户端10.虚拟主机配置文件vhost:
[root@mail files]# cat huasuan.conf server { listen 80; server_name {{ pillar['hostname'] }}; location / { proxy_pass http://{{ pillar['pass'] }}; proxy_set_header Host $host; proxy_set_header X-Real-IP $remote_addr; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; } location ~ /\.git { deny all; } } 注释:pillar['hostname']和pillar['pass']由上面我们定义的pillar基于jinja获得,这里用反向代 理服务器为例10.服务启动脚本,没什么特别的;就是把它放在服务器端,同步到客户端启动目录:
[root@mail files]# cat nginx #!/bin/sh # # nginx - this script starts and stops the nginx daemon # # chkconfig: - 85 15 # description: Nginx is an HTTP(S) server, HTTP(S) reverse \ # proxy and IMAP/POP3 proxy server # processname: nginx # config: /usr/local/nginx/conf/nginx.conf # pidfile: /usr/local/nginx/logs/nginx.pid # Source function library. . /etc/rc.d/init.d/functions # Source networking configuration. . /etc/sysconfig/network # Check that networking is up. [ "$NETWORKING" = "no" ] && exit 0 nginx="/usr/local/nginx/sbin/nginx" prog=$(basename $nginx) NGINX_CONF_FILE="/usr/local/nginx/conf/nginx.conf" lockfile=/var/lock/subsys/nginx make_dirs() { # make required directories user=`$nginx -V 2>&1 | grep "configure arguments:" | sed 's/[^*]*--user=\([^ ]*\).*/\1/g' -` if [ -z "`grep $user /etc/passwd`" ]; then useradd -M -s /bin/nologin $user fi options=`$nginx -V 2>&1 | grep 'configure arguments:'` for opt in $options; do if [ `echo $opt | grep '.*-temp-path'` ]; then value=`echo $opt | cut -d "=" -f 2` if [ ! -d "$value" ]; then # echo "creating" $value mkdir -p $value && chown -R $user $value fi fi done } start() { [ -x $nginx ] || exit 5 [ -f $NGINX_CONF_FILE ] || exit 6 make_dirs echo -n $"Starting $prog: " daemon $nginx -c $NGINX_CONF_FILE retval=$? echo [ $retval -eq 0 ] && touch $lockfile return $retval } stop() { echo -n $"Stopping $prog: " killproc $prog -QUIT retval=$? echo [ $retval -eq 0 ] && rm -f $lockfile return $retval } restart() { configtest || return $? stop sleep 1 start } reload() { configtest || return $? echo -n $"Reloading $prog: " killproc $nginx -HUP RETVAL=$? echo } force_reload() { restart } configtest() { $nginx -t -c $NGINX_CONF_FILE } rh_status() { status $prog } rh_status_q() { rh_status >/dev/null 2>&1 } case "$1" in start) rh_status_q && exit 0 $1 ;; stop) rh_status_q || exit 0 $1 ;; restart|configtest) $1 ;; reload) rh_status_q || exit 7 $1 ;; force-reload) force_reload ;; status) rh_status ;; condrestart|try-restart) rh_status_q || exit 0 ;; *) echo $"Usage: $0 {start|stop|status|restart|condrestart|try-restart|reload|force-reload|configtest}" exit 2 esac1.配置完成:启动服务器开始安装 *** 作:
启动 *** 作: [root@mail salt]# salt 'monitor' state.highstate12.检查结果:
查看客户端文件配置文件,并看到它已经生效。我的客户端是4个内核,所以给定的worker_processer是4:
并且nginx服务已经启动:
到目前为止,所有的安装和部署过程已经完成。有了saltstack,我们发现再多的机器也无法根据我们的需求快速部署系统。
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