HeartBeat源代码学习

HeartBeat源代码学习

 

用kill(pid,0) >= 0 || errno != ESRCH 可以判断是不是存在个processinit_procinfo－－用来保存一个全系统的变量（进程之间用）可以定义一些宏，然后让这些宏由configure指定，就可以定义出程序要用的文件的信息！#ifndef HA_PLUGIN_D#define HA_PLUGIN_DHALIB "/plugins"#endifplugin的处理，用plis libplis lib的使用Provides a general plugin and interface loading library/usr/lib/pils/plugins/InterfaceMgr/generic.soInterfaceMgr/generic.c－－用来定义load interface。。。？？？可以连续的杀进程if (CL_KILL((pid_t)running_hb_pid, SIGTERM) >= 0) {/* Wait for the running heartbeat to die */alarm(0);do {sleep(1);continue;}while (CL_KILL((pid_t)running_hb_pid, 0) >= 0);cleanexit(LSB_EXIT_OK);}init_config???initialize_heartbeat创建fifo register fifo    pipe status_pipeOpen all our heartbeat channels（？？？）－－建立与一些so的通讯pathhb_mediawrite_childread_childReads hb channel (tty, UDP, etc)copying to master status pipe For ttys ONLY:copying to tty write pipes (incrementing hop count andfiltering out "ring wraparounds")master_status_process用来记录child的信息（serial，udp。。。）clustermsg_input_dispatchprocess_clustermsg－－Process a message coming in from our status FIFO（从Control process或者child）APIregistration_input_dispatchprocess_registermsghb_send_local_statussend_local_statushb_dump_all_proc_statsapi_audit_clientsGmain_hb_signal_process_pendinghb_signal_process_pendingMaster Status process: Reads master status pipe(从Control process)forks children, etc. to deal with status changescontrol_processControl process:Reads a control fifo for input Writes master status pipe Writes heartbeat channel pipeshb_rsc_recover_dead_resources--Node 'hip' has died.    Take over its resources (if any)  This may mean we have to STONITH them.tips:可以在加参数-d来增加调试heartbeat是用来保证集群调度器的死活mon是用来保证后面的东西的死活Heartbeat runs on both machines, but Apache and Mon is only running on the active onemon的alert把heartbeat停止，就可以换了