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MINOR: systemd wrapper: add support for passing the -x option. 

Make the systemd wrapper chech if HAPROXY_STATS_SOCKET if set.
If set, it will use it as an argument to the "-x" option, which makes
haproxy asks for any listening socket, on the stats socket, in order
to achieve reloads with no new connection lost.
This commit is contained in:
Olivier Houchard 2017-04-09 16:28:10 +02:00 committed by Willy Tarreau
parent 547408787f
commit 2c9744fe56
2 changed files with 11 additions and 1 deletions
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2
contrib/systemd/haproxy.service.in
View File

@ -3,6 +3,8 @@ Description=HAProxy Load Balancer
After=network.target
[Service]
# You can point the environment variable HAPROXY_STATS_SOCKET to a stats
# socket if you want seamless reloads.
Environment="CONFIG=/etc/haproxy/haproxy.cfg" "PIDFILE=/run/haproxy.pid"
ExecStartPre=@SBINDIR@/haproxy -f $CONFIG -c -q
ExecStart=@SBINDIR@/haproxy-systemd-wrapper -f $CONFIG -p $PIDFILE

10
src/haproxy-systemd-wrapper.c
View File

@ -92,11 +92,15 @@ static void spawn_haproxy(char **pid_strv, int nb_pid)
pid = fork();
if (!pid) {
char **argv;
char *stats_socket = NULL;
int i;
int argno = 0;
/* 3 for "haproxy -Ds -sf" */
argv = calloc(4 + main_argc + nb_pid + 1, sizeof(char *));
if (nb_pid > 0)
stats_socket = getenv("HAPROXY_STATS_SOCKET");
argv = calloc(4 + main_argc + nb_pid + 1 +
(stats_socket != NULL ? 2 : 0), sizeof(char *));
if (!argv) {
fprintf(stderr, SD_NOTICE "haproxy-systemd-wrapper: failed to calloc(), please try again later.\n");
exit(1);
@ -121,6 +125,10 @@ static void spawn_haproxy(char **pid_strv, int nb_pid)
argv[argno++] = "-sf";
for (i = 0; i < nb_pid; ++i)
argv[argno++] = pid_strv[i];
if (stats_socket != NULL) {
argv[argno++] = "-x";
argv[argno++] = stats_socket;
}
}
argv[argno] = NULL;