newlisp 监控Linux进程 四

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本节尝试将监控进程的方式交给调用者。主要有两个原因:

1. 调用者传递判定代码,这样可以根据不同的平台进行变化,比如windows肯定没有ps -def 命令。这样可以适应更多的情况

2. ps -def | grep ***的方式,在newlisp中返回的表的元素数目少数时候会少一个元素,比如我在监控mongodb的时候遇到下面的元素有时候得不到。

"root     10658 10655  0 00:46 ?        00:00:00 grep mongodb"
因此如果还用

(> l 2)
来判断是不正确的,会误报。

先调整一下filter.lsp,如下例:

(set 'filters (list '((exec "pidof mongod") "mongodb" (exec "service mongodb start"))                                                                                                                ))     
第一个元素现在是一个list,运行pidof命令,如果找到mongod进程,则返回含有进程id的list,否则返回()

再修改一下process.lsp代码:

#!/usr/bin/newlisp                                                                                                                                                                                                                                                                                                                                                (set 'cur-path "/opt/detector")                                                                                                                                                  (load (append cur-path "/filter.lsp"))                                                                                                                                           (load (append cur-path "/config.lsp"))                                                                                                                                                                                                                                                                                                                            (define (check-process check-cmd)                                                                                                                                                  (set 's (eval check-cmd))                                                                                                                                                        (add-log (string s))                                                                                                                                                             s                                                                                                                                                                              )                                                                                                                                                                                                                                                                                                                                                                 (define (add-log msg)                                                                                                                                                              (println msg)                                                                                                                                                                    (append-file (append cur-path "/process.log") (append "\n" (string (now 480)) " "))                                                                                              (append-file (append cur-path "/process.log") (append  ": " msg))                                                                                                                )                                                                                                                                                                                                                                                                                                                                                               (define (call-api process-name process-status)                                                                                                                                     (set 'data (format "ip=%s&hostName=%s&type=proc_%s&values=%lld|%f" ip host_name process-name (date-value) process-status))                                                       (println data)                                                                                                                                                                   (set 'r3 (post-url (format "http://%s/wind_tunnel/api/post/data" server) data))                                                                                                  (println r3))                                                                                                                                                                                                                                                                                                                                                   (dolist (sub-list filters)                                                                                                                                                         (if (check-process (first sub-list))                                                                                                                                                 (begin                                                                                                                                                                            (add-log (append (sub-list 1) " is alive\n"))                                                                                                                                    (call-api (sub-list 1) 1.0)                                                                                                                                                      )                                                                                                                                                                             (begin                                                                                                                                                                            (add-log (append (sub-list 1) " is dead\n"))                                                                                                                                     (eval (sub-list 2))                                                                                                                                                              (call-api (sub-list 1) 0))))                                                                                                                                                                                                                                                                                                                                 (exit)     

好,现在MongoDB进程监控正常了,不会误报。并且可以在filter.lsp中配置各种专用命令来检测进程。

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