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MINOR: init: allow a fileless init mode

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This patch provides the possibility to initialize haproxy without
configuration file. This may be identified by the new global and exported
<fileless_mode> and <fileless_cfg> variables which may be used to
provide a struct cfgfile to haproxy by others means than a physical
file (built in memory).
When enabled, this fileless mode skips all the configuration files
parsing.
This commit is contained in:
Frederic Lecaille 2026-02-11 11:11:16 +01:00 committed by Willy Tarreau
parent 234ce775c3
commit 6013f4baeb
2 changed files with 19 additions and 4 deletions
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3
include/haproxy/global.h
View File

@ -24,6 +24,7 @@
#include <haproxy/api-t.h>
#include <haproxy/global-t.h>
#include <haproxy/cfgparse.h>
extern struct global global;
extern int pid; /* current process id */
@ -54,6 +55,8 @@ extern char **old_argv;
extern const char *old_unixsocket;
extern int daemon_fd[2];
extern int devnullfd;
extern int fileless_mode;
extern struct cfgfile fileless_cfg;
struct proxy;
struct server;

20
src/haproxy.c
View File

@ -150,6 +150,8 @@ char **init_env; /* to keep current process env variables backup */
int pidfd = -1; /* FD to keep PID */
int daemon_fd[2] = {-1, -1}; /* pipe to communicate with parent process */
int devnullfd = -1;
int fileless_mode;
struct cfgfile fileless_cfg;
static int stopped_tgroups;
static int stop_detected;
@ -3375,8 +3377,16 @@ int main(int argc, char **argv)
if (backup_env() != 0)
exit(EXIT_FAILURE);
/* parse conf in discovery mode and set modes from config */
read_cfg_in_discovery_mode(argc, argv);
if (!fileless_mode)
/* parse conf in discovery mode and set modes from config */
read_cfg_in_discovery_mode(argc, argv);
else {
int ret;
ret = parse_cfg(&fileless_cfg);
if (ret != 0)
exit(EXIT_FAILURE);
}
/* From this stage all runtime modes are known. So let's do below some
* preparation steps and then let's apply all discovered modes.
@ -3418,8 +3428,10 @@ int main(int argc, char **argv)
mworker_apply_master_worker_mode();
}
/* Worker, daemon, foreground modes read the rest of the config */
if (!master) {
/* Worker, daemon, foreground, configuration with files modes read the rest
* of the config.
*/
if (!master && !fileless_mode) {
usermsgs_clr("config");
if (global.mode & MODE_MWORKER) {
if (clean_env() != 0) {