Puppet函数介绍(十八)
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puppet函数
puppet函数主要用途是完成一个功能的集合，puppet的函数很多,只例举常用的几个.
define函数
define函数主要用于创建自定义函数，define支持参数但不支持继承.通常可以通过define函数将多个资源整合为一个资源.
define函数示例(crontab计划任务模块):
新建cron模块,依次建{templates,manifests,lib,files}文件夹,模块资源清单文件manifests下必须有init.pp文件，定义此模块的类且类名唯一.
init.pp文件声明使用cron模块下的basescript类资源.
class cron {
include cron::basescript
}
basescript.pp类文件定义资源.
注释:把/root/bin下匹配到的脚本文件发送到各agent端的/root/bin文件夹下,同时定义crontab计划任务.
class cron::basescript{
file {"/root/bin":
ensure=> directory,
mode=>755,
}
define webcronscript ($mode = "755") {
file { "/root/bin/$name" :
source => "puppet:///modules/cron/root/bin/$name",
mode => $mode,
require=> File["/root/bin"],
}
}
webcronscript { ["check_ping.sh","check_hostname.sh"]: }
file { "/etc/cron.d/auto-task":
owner => root,
group => root,
mode => 644,
source => "puppet:///modules/cron/etc/cron.d/auto-task",
}
}
cron模块file文件夹下依次创建/root/bin目录及个脚本文件.
脚本文件路径:
cron计划任务:
puppet 入口文件import载入nodes.pp文件.
#----site.pp---- import"nodes"
node.pp文件base节点载入cron模块.
node base {
include admin
include cron
}
node /sh-(proxy|web)\d+/ inherits base {
case $::hostname {
/sh-proxy\d+/: {
include apache
}
"sh-web1": {
include nginx::nginxconf
include php
}
}
}
sh-proxy2和sh-web1两台agent端更新测试:
[[email protected] ~]# puppet agent -t Info: Retrieving pluginfacts Info: Retrieving plugin Info: Loading facts Info: Caching catalog for sh-proxy2.localdomain Info: Applying configuration version ‘1506525578‘ Notice: /Stage[main]/Admin/Exec[selinux]/returns: executed successfully Notice: /Stage[main]/Cron::Basescript/File[/root/bin]/ensure: created Notice: /Stage[main]/Cron::Basescript/Cron::Basescript::Webcronscript[check_ping.sh]/File[/root/bin/check_ping.sh]/ensure: defined content as ‘{md5}a68da6e8a332234afa8c9d3c2834c5df‘ Notice: /Stage[main]/Cron::Basescript/Cron::Basescript::Webcronscript[check_hostname.sh]/File[/root/bin/check_hostname.sh]/ensure: defined content as ‘{md5}47b425aa5853a5487c139957101cb08c‘ Notice: Finished catalog run in 0.44 seconds
[[email protected] bin]# puppet agent -t Notice: Ignoring --listen on onetime run Info: Retrieving pluginfacts Info: Retrieving plugin Info: Loading facts Info: Caching catalog for sh-web1.localdomain Info: Applying configuration version ‘1506522880‘ Notice: /Stage[main]/Admin/Exec[selinux]/returns: executed successfully Notice: /Stage[main]/Cron::Basescript/Cron::Basescript::Webcronscript[check_ping.sh]/File[/root/bin/check_ping.sh]/ensure: defined content as ‘{md5}a68da6e8a332234afa8c9d3c2834c5df‘ Notice: /Stage[main]/Cron::Basescript/File[/etc/cron.d/auto-task]/ensure: defined content as ‘{md5}d77faa0254d615e0fcb646beb73a91e3‘ Notice: /Stage[main]/Cron::Basescript/Cron::Basescript::Webcronscript[check_hostname.sh]/File[/root/bin/check_hostname.sh]/ensure: defined content as ‘{md5}47b425aa5853a5487c139957101cb08c‘ Notice: Finished catalog run in 0.53 seconds
tagged函数用法:
tagged通过tag为资源做标记,并通过tagged函数判断被标记的类与类之间的关系.
下面通过php模块演示:
modules/php/init.pp文件内容：
class php {
include php::phpfpmconf
$packages = [‘php‘,‘php-devel‘]
package {[$packages]:
ensure=> "installed"
}
package {"php-fpm":
ensure => present,
}
service {"php-fpm":
ensure=> running,
enable=> true,
hasrestart=> true,
hasstatus=> true,
provider => init,
require=> Package["php-fpm"],
}
}
modules/php/phpfpmconf.pp函数文件内容:
注释:通过tagged函数来区分php参数，即各个类型主机匹配的资源.
class php::phpfpmconf {
define generatePHPFpmFiles () {
if tagged("web::proxy") {
/* web::proxy */
$sock_max_children = 50
$sock_max_spare_servers = 20
$sock_start_servers = 12
$www_max_children = 20
$www_max_spare_servers = 20
$www_start_servers = 12
$need_apc = false
$display_errors = "on"
$sock_max_requests = 5000
$www_max_requests = 5000
$memory_limit = 1024
$max_execution_time = 300
$slowlog_timeout = 10
$post_max_size="12M"
$upload_max_filesize="12M"
} else {
/* web */
$sock_max_children =20
$sock_max_spare_servers = 20
$sock_start_servers = 12
$www_max_children = 20
$www_max_spare_servers = 20
$www_start_servers = 12
$need_apc = false
$display_errors = "off"
$sock_max_requests = 500
$www_max_requests = 500
$memory_limit = 1024
$max_execution_time = 300
$slowlog_timeout = 10
$post_max_size="12M"
$upload_max_filesize="12M"
}
case $::hostname {
"sh-proxy2" : {
file { "/etc/php-fpm.d/www.conf":
ensure => file,
content => template(‘php/www.conf.erb‘),
#notify => Service["php-fpm"],
}
}
default :{
file { "/etc/php-fpm.d/www.conf":
owner => "root",
group => "root",
mode => "644",
ensure => "file",
content => template("php/www.conf.erb")
}
}
}
}
case $::hostname {
/[a-z][A-Z]\d+/ : {
generatePHPFpmFiles { ‘dv‘: }
}
default : {
generatePHPFpmFiles { $::hostname: }
}
}
}
modules/php/templates/www.conf.erb模板内容大致也就是上面那些定义变量的参数:
注释:先安装一台php-fpm，把/etc/php-fpm.d/www.conf文件复制粘贴一份做模板文件，里面参数改改就行.
pm = static pm.max_children = <%= www_max_children %> pm.start_servers = <%= www_start_servers %> pm.max_spare_servers = <%= www_max_spare_servers %> .....
puppet的node.pp文件，在匹配sh-proxy主机时定义tag标记。
注释:匹配到主机sh-proxy定义tag为web::proxy.
node base {
include admin
include cron
}
node /sh-(proxy|web)\d+/ inherits base {
case $::hostname {
/sh-proxy\d+/: {
tag ("web::proxy")
include php
}
"sh-web1": {
include php
}
}
}agent端更新测试:
[[email protected] php-fpm.d]# puppet agent -t Info: Retrieving pluginfacts Info: Retrieving plugin Info: Loading facts Info: Caching catalog for sh-proxy2.localdomain Info: Applying configuration version ‘1506534804‘ Notice: /Stage[main]/Admin/Exec[selinux]/returns: executed successfully Notice: /Stage[main]/Php::Phpfpmconf/Php::Phpfpmconf::Generatephpfpmfiles[sh-proxy2]/File[/etc/php-fpm.d/www.conf]/content: --- /etc/php-fpm.d/www.conf2017-03-22 20:29:28.000000000 +0800 +++ /tmp/puppet-file20170928-96466-ix9fq8-02017-09-28 01:53:24.115952791 +0800 @@ -1,3 +1,13 @@ +[global] +; Pid file +; Default Value: none +pid = /var/run/php-fpm_www.pid + + +; Error log file +; Default Value: /usr/local/var/log/php-fpm.log +error_log = /var/log/php-fpm/php-fpm.error.log + ; Start a new pool named ‘www‘. [www] @@ -9,11 +19,14 @@ ; specific port; ; ‘/path/to/unix/socket‘ - to listen on a unix socket. ; Note: This value is mandatory. -listen = 127.0.0.1:9000 + + +listen = 9000 + ; Set listen(2) backlog. A value of ‘-1‘ means unlimited. ; Default Value: -1 -;listen.backlog = -1 +listen.backlog = 4096 ; List of ipv4 addresses of FastCGI clients which are allowed to connect. ; Equivalent to the FCGI_WEB_SERVER_ADDRS environment variable in the original @@ -21,7 +34,7 @@ ; must be separated by a comma. If this value is left blank, connections will be ; accepted from any ip address. ; Default Value: any -listen.allowed_clients = 127.0.0.1 +;listen.allowed_clients = ; Set permissions for unix socket, if one is used. In Linux, read/write ; permissions must be set in order to allow connections from a web server. Many @@ -36,9 +49,9 @@ ; Note: The user is mandatory. If the group is not set, the default user‘s group ; will be used. ; RPM: apache Choosed to be able to access some dir as httpd -user = apache +user = nobody ; RPM: Keep a group allowed to write in log dir. -group = apache +group = www ; Choose how the process manager will control the number of child processes. ; Possible Values: @@ -57,7 +70,7 @@ ; of ‘idle‘ processes is greater than this ; number then some children will be killed. ; Note: This value is mandatory. -pm = dynamic +pm = static ; The number of child processes to be created when pm is set to ‘static‘ and the ; maximum number of child processes to be created when pm is set to ‘dynamic‘. @@ -67,12 +80,12 @@ ; CGI. ; Note: Used when pm is set to either ‘static‘ or ‘dynamic‘ ; Note: This value is mandatory. -pm.max_children = 50 +pm.max_children = 20 ; The number of child processes created on startup. ; Note: Used only when pm is set to ‘dynamic‘ ; Default Value: min_spare_servers + (max_spare_servers - min_spare_servers) / 2 -pm.start_servers = 5 +pm.start_servers = 12 ; The desired minimum number of idle server processes. ; Note: Used only when pm is set to ‘dynamic‘ @@ -82,13 +95,13 @@ ; The desired maximum number of idle server processes. ; Note: Used only when pm is set to ‘dynamic‘ ; Note: Mandatory when pm is set to ‘dynamic‘ -pm.max_spare_servers = 35 +pm.max_spare_servers = 20 ; The number of requests each child process should execute before respawning. ; This can be useful to work around memory leaks in 3rd party libraries. For ; endless request processing specify ‘0‘. Equivalent to PHP_FCGI_MAX_REQUESTS. -; Default Value: 0 -;pm.max_requests = 500 +; Default Value: -2 +pm.max_requests = 5000 ; The URI to view the FPM status page. If this value is not set, no URI will be ; recognized as a status page. By default, the status page shows the following @@ -118,7 +131,7 @@ ; anything, but it may not be a good idea to use the .php extension or it ; may conflict with a real PHP file. ; Default Value: not set -;pm.status_path = /status +pm.status_path = /status ; The ping URI to call the monitoring page of FPM. If this value is not set, no ; URI will be recognized as a ping page. This could be used to test from outside @@ -135,20 +148,20 @@ ; This directive may be used to customize the response of a ping request. The ; response is formatted as text/plain with a 200 response code. ; Default Value: pong -;ping.response = pong +ping.response = pong ; The timeout for serving a single request after which the worker process will ; be killed. This option should be used when the ‘max_execution_time‘ ini option ; does not stop script execution for some reason. A value of ‘0‘ means ‘off‘. ; Available units: s(econds)(default), m(inutes), h(ours), or d(ays) ; Default Value: 0 -;request_terminate_timeout = 0 +request_terminate_timeout = 0 ; The timeout for serving a single request after which a PHP backtrace will be ; dumped to the ‘slowlog‘ file. A value of ‘0s‘ means ‘off‘. ; Available units: s(econds)(default), m(inutes), h(ours), or d(ays) ; Default Value: 0 -;request_slowlog_timeout = 0 +request_slowlog_timeout = 10 ; The log file for slow requests ; Default Value: not set @@ -179,24 +192,16 @@ ; Redirect worker stdout and stderr into main error log. If not set, stdout and ; stderr will be redirected to /dev/null according to FastCGI specs. ; Default Value: no -;catch_workers_output = yes +catch_workers_output = yes -; Limits the extensions of the main script FPM will allow to parse. This can -; prevent configuration mistakes on the web server side. You should only limit -; FPM to .php extensions to prevent malicious users to use other extensions to -; exectute php code. -; Note: set an empty value to allow all extensions. -; Default Value: .php -;security.limit_extensions = .php .php3 .php4 .php5 - ; Pass environment variables like LD_LIBRARY_PATH. All $VARIABLEs are taken from ; the current environment. ; Default Value: clean env -;env[HOSTNAME] = $HOSTNAME -;env[PATH] = /usr/local/bin:/usr/bin:/bin -;env[TMP] = /tmp -;env[TMPDIR] = /tmp -;env[TEMP] = /tmp +env[HOSTNAME] = $HOSTNAME +env[PATH] = /usr/local/bin:/usr/bin:/bin +env[TMP] = /tmp +env[TMPDIR] = /tmp +env[TEMP] = /tmp ; Additional php.ini defines, specific to this pool of workers. These settings ; overwrite the values previously defined in the php.ini. The directives are the @@ -215,12 +220,10 @@ ; Default Value: nothing is defined by default except the values in php.ini and ; specified at startup with the -d argument ;php_admin_value[sendmail_path] = /usr/sbin/sendmail -t -i -f [email protected] -;php_flag[display_errors] = off -php_admin_value[error_log] = /var/log/php-fpm/www-error.log +php_flag[display_errors] = on +php_admin_value[error_log] = /var/log/php-fpm/www.error.log php_admin_flag[log_errors] = on -;php_admin_value[memory_limit] = 128M - -; Set session path to a directory owned by process user -php_value[session.save_handler] = files -php_value[session.save_path] = /var/lib/php/session +;php_admin_value[memory_limit] = 32M +;add by zkf . add some file support. p file is used by channel. +security.limit_extensions = .php .php3 .php4 .php5 .html .do .js .css .htm p \ No newline at end of file Info: Computing checksum on file /etc/php-fpm.d/www.conf Info: /Stage[main]/Php::Phpfpmconf/Php::Phpfpmconf::Generatephpfpmfiles[sh-proxy2]/File[/etc/php-fpm.d/www.conf]: Filebucketed /etc/php-fpm.d/www.conf to puppet with sum 2402465907d7a7544db6315c55248938 Notice: /Stage[main]/Php::Phpfpmconf/Php::Phpfpmconf::Generatephpfpmfiles[sh-proxy2]/File[/etc/php-fpm.d/www.conf]/content: content changed ‘{md5}2402465907d7a7544db6315c55248938‘ to ‘{md5}a8ef2b23bd9feab1848d3dfe27ab1bd6‘ Notice: Finished catalog run in 0.56 seconds grep过滤修改的参数查看是否改变了: [[email protected] php-fpm.d]# cat www.conf | grep requests ; The address on which to accept FastCGI requests. ; This value sets the limit on the number of simultaneous requests that will be ; The number of requests each child process should execute before respawning. pm.max_requests = 5000 ; The log file for slow requests
template函数
template函数可以通过file资源调用模块中的*.erb模板文件。
示例(上面的php模板)：
content => template("php/www.conf.erb")template也可以合并模板:
"sh-proxy2" : {
file { "/etc/php-fpm.d/www.conf":
ensure => file,
content => template("php/www.conf.erb","php/wwwproxy.conf.erb"),
#notify => Service["php-fpm"],
}
}
agent端更新后做对比:
合并模板后:
[[email protected] php-fpm.d]# cat www.conf | wc -l 458
合并模板前:
[[email protected] php-fpm.d]# cat www.conf | wc -l 228
两个模板就算参数重复也不会覆盖，只是在同一个文件中追加另一个模板的内容.
[[email protected] php-fpm.d]# cat www.conf | grep -v ‘^;‘ | grep -v ‘^$‘ | grep request_terminate_timeout request_terminate_timeout = 0 request_terminate_timeout = 0
Generate 函数
generate 函数调用外部命令并且返回结果给Puppet，用法如下：
$interfaces = generate("/sbin/ifconfig", "eth0")这里定义了一个变量叫做$interfaces,它调用了generate 函数，所有的generate 函数必须有一个指明的命令，然后填入若干参数，这两个直接用逗号分割，返回的结果就是执行命令
# /sbin/ifconfig eth0
注释:将返回结果返回给$interface,命令执行完必须返回状态码为0,返回其他的状态码就会造成解释错误。
本地应用:
示例:
# cat 3.pp $ifip=generate (‘/sbin/ifconfig‘,‘eth0‘) notice $ifip
# puppet apply 3.pp Notice: Scope(Class[main]): eth0 Link encap:Ethernet HWaddr 00:0C:29:06:AF:4B inet addr:192.168.30.132 Bcast:192.168.30.255 Mask:255.255.255.0 inet6 addr: fe80::20c:29ff:fe06:af4b/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:612647 errors:0 dropped:0 overruns:0 frame:0 TX packets:174442 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:614959446 (586.4 MiB) TX bytes:24739431 (23.5 MiB) Notice: Compiled catalog for sh-proxy2.localdomain in environment production in 0.06 seconds Notice: Finished catalog run in 0.01 seconds
在puppet代码中嵌入这段代码,获取的就是master端的信息:
node base {
include admin
include cron
}
node /sh-(proxy|web)\d+/ inherits base {
case $::hostname {
/sh-proxy\d+/: {
tag ("web::proxy")
include php
}
"sh-web1": {
include php
$ifip=generate(‘/sbin/ifconfig‘,‘eth0‘)
notify {"$ifip":}
}
}
}agent端更新:
192.168.30.134为master端的ip.
[[email protected] ~]# puppet agent -t Notice: Ignoring --listen on onetime run Info: Retrieving pluginfacts Info: Retrieving plugin Info: Loading facts Info: Caching catalog for sh-web1.localdomain Info: Applying configuration version ‘1506606174‘ Notice: /Stage[main]/Admin/Exec[selinux]/returns: executed successfully Notice: eth0 Link encap:Ethernet HWaddr 00:0C:29:53:DD:61 inet addr:192.168.30.134 Bcast:192.168.30.255 Mask:255.255.255.0 inet6 addr: fe80::20c:29ff:fe53:dd61/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:228766 errors:0 dropped:0 overruns:0 frame:0 TX packets:102934 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:107060668 (102.1 MiB) TX bytes:50130125 (47.8 MiB) Notice: /Stage[main]/Main/Node[sh-proxywebd]/Notify[eth0 Link encap:Ethernet HWaddr 00:0C:29:53:DD:61 inet addr:192.168.30.134 Bcast:192.168.30.255 Mask:255.255.255.0 inet6 addr: fe80::20c:29ff:fe53:dd61/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:228766 errors:0 dropped:0 overruns:0 frame:0 TX packets:102934 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:107060668 (102.1 MiB) TX bytes:50130125 (47.8 MiB) ]/message: defined ‘message‘ as ‘eth0 Link encap:Ethernet HWaddr 00:0C:29:53:DD:61 inet addr:192.168.30.134 Bcast:192.168.30.255 Mask:255.255.255.0 inet6 addr: fe80::20c:29ff:fe53:dd61/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:228766 errors:0 dropped:0 overruns:0 frame:0 TX packets:102934 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:107060668 (102.1 MiB) TX bytes:50130125 (47.8 MiB) ‘ Notice: Finished catalog run in 0.32 seconds
versioncmp函数(用的不多):
versioncmp函数用于版本号之间的比较.
versioncmp有三个返回值:
如果版本a大于版本b，则返回1.
如果版本a等于版本b，则返回0.
如果版本a小雨版本b，则返回-1.
puppet代码文件:
# cat 4.pp
if versioncmp (‘2.6‘,‘2.4‘) > 0 {
notice ("2.6 is > than 2.4")
}puppet本地应用:
# puppet apply 4.pp Notice: Scope(Class[main]): 2.6 is > than 2.4 Notice: Compiled catalog for sh-web1.localdomain in environment production in 0.06 seconds Notice: Finished catalog run in 0.01 seconds
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