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lxc-start 源码分析

Posted by 夏泽民 Jul 6, 2019

https://github.com/lxc/lxc lxc_start.c int main(int argc, char *argv[]) { int err = 1; struct lxc_conf *conf; //初始化config结构 char *const *args; //传递的参数 char *rcfile = NULL; //指定配置文件 char *const default_args[] = { //默认的args参数 “/sbin/init”, NULL, };
struct lxc_container *c; //lxc-container 的结构体 …. } lxc_conf这个数据结构 struct lxc_conf { int is_execute; //容器是否在执行 char *fstab; //fstab？ int tty; //tty的个数 int pts; //pts的个数？ int reboot; //重启？ int need_utmp_watch; //字面翻译 需要utmp 查看 signed long personality; //字面翻译 特点 struct utsname *utsname; //ustname struct lxc_list cgroup; //cgroup list lxc_list只是简单的链表结构 struct lxc_list id_map; //id_map list struct lxc_list network; //network list struct saved_nic *saved_nics;//saved_nics 结构 int num_savednics; //savednics数量？ int auto_mounts; //auto_mounts? struct lxc_list mount_list; //mount_list list? struct lxc_list caps; //caps list？ struct lxc_list keepcaps; //keepcaps list? struct lxc_tty_info tty_info; //tty的相关信息 struct lxc_console console; //console的结构体 struct lxc_rootfs rootfs; //rootfs的结构体 char *ttydir; //tty目录 int close_all_fds; //关闭所有fd struct lxc_list hooks[NUM_LXC_HOOKS]; //hooks 函数

char *lsm_aa_profile;   //?
char *lsm_se_context;	//?
int tmp_umount_proc;	//?
char *seccomp;  // filename with the seccomp rules #if HAVE_SCMP_FILTER_CTX
scmp_filter_ctx seccomp_ctx; #endif
int maincmd_fd;		//?
int autodev;  // if 1, mount and fill a /dev at start
int haltsignal; // signal used to halt container
int stopsignal; // signal used to hard stop container
int kmsg;  // if 1, create /dev/kmsg symlink
char *rcfile;   // Copy of the top level rcfile we read
 
// Logfile and loglevel can be set in a container config file.
// Those function as defaults.  The defaults can be overriden
// by command line.  However we don't want the command line
// specified values to be saved on c->save_config().  So we
// store the config file specified values here.
char *logfile;  // the logfile as specifed in config
int loglevel;   // loglevel as specifed in config (if any)
 
int inherit_ns_fd[LXC_NS_MAX];
 
int start_auto;
int start_delay;
int start_order;
struct lxc_list groups;
int nbd_idx;
 
/* set to true when rootfs has been setup */
bool rootfs_setup; };
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hijack

Posted by 夏泽民 Jul 5, 2019

type Hijacker interface { Hijack() (net.Conn, *bufio.ReadWriter, error) } //返回连接接口net.Conn和ReadWriter,bufio读写的 // Hijack lets the caller take over the connection. —–Hijack让调用者管理连接

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gotty 把你的 Linux 终端放到浏览器里面

Posted by 夏泽民 Jul 5, 2019

https://github.com/yudai/gotty GoTTY 是一个简单的基于 Go 语言的命令行工具，它可以将你的终端（TTY）作为 web 程序共享。它会将命令行工具转换为 web 程序。

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fcgi

Posted by 夏泽民 Jul 4, 2019

nginx 配置 server { listen 80; server_name go.dev; root /root/go/src/godev; index index.html; #gzip off; #proxy_buffering off;

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fastcgi_client

Posted by 夏泽民 Jul 4, 2019

CGI全称是“通用网关接口”(Common Gateway Interface)，HTTP服务器与你的或其它机器上的程序进行“交谈”的一种工具，其程序一般运行在网络服务器上。 CGI可以用任何一种语言编写，只要这种语言具有标准输入、输出和环境变量。如php,perl,tcl等。

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