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MINOR: server: add support for explicit numeric address in init-addr

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This will allow a server to automatically fall back to an explicit numeric
IP address when all other methods fail. The address is simply specified in
the address list.
This commit is contained in:
Willy Tarreau 2016-11-02 15:05:56 +01:00
parent 465b6e5463
commit 4310d36a7e
2 changed files with 22 additions and 0 deletions
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2
include/types/server.h
View File

@ -96,6 +96,7 @@ enum srv_initaddr {
SRV_IADDR_NONE = 1, /* the server won't have any address at start up */
SRV_IADDR_LIBC = 2, /* address set using the libc DNS resolver */
SRV_IADDR_LAST = 3, /* we set the IP address found in state-file for this server */
SRV_IADDR_IP = 4, /* we set an arbitrary IP address to the server */
};
/* server-state-file version */
@ -245,6 +246,7 @@ struct server {
char *lastaddr; /* the address string provided by the server-state file */
struct dns_resolution *resolution; /* server name resolution */
struct dns_options dns_opts;
struct sockaddr_storage init_addr; /* plain IP address specified on the init-addr line */
unsigned int init_addr_methods; /* initial address setting, 3-bit per method, ends at 0, enough to store 10 entries */
#ifdef USE_OPENSSL

20
src/server.c
View File

@ -1166,6 +1166,7 @@ int parse_server(const char *file, int linenum, char **args, struct proxy *curpr
else if (!strcmp(args[cur_arg], "init-addr")) {
char *p, *end;
int done;
struct sockaddr_storage sa;
newsrv->init_addr_methods = 0;
memset(&newsrv->init_addr, 0, sizeof(newsrv->init_addr));
@ -1176,6 +1177,7 @@ int parse_server(const char *file, int linenum, char **args, struct proxy *curpr
if (*end)
*(end++) = 0;
memset(&sa, 0, sizeof(sa));
if (!strcmp(p, "libc")) {
done = srv_append_initaddr(&newsrv->init_addr_methods, SRV_IADDR_LIBC);
}
@ -1185,6 +1187,16 @@ int parse_server(const char *file, int linenum, char **args, struct proxy *curpr
else if (!strcmp(p, "none")) {
done = srv_append_initaddr(&newsrv->init_addr_methods, SRV_IADDR_NONE);
}
else if (str2ip2(p, &sa, 0)) {
if (is_addr(&newsrv->init_addr)) {
Alert("parsing [%s:%d]: '%s' : initial address already specified, cannot add '%s'.\n",
file, linenum, args[cur_arg], p);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
newsrv->init_addr = sa;
done = srv_append_initaddr(&newsrv->init_addr_methods, SRV_IADDR_IP);
}
else {
Alert("parsing [%s:%d]: '%s' : unknown init-addr method '%s', supported methods are 'libc', 'last', 'none'.\n",
file, linenum, args[cur_arg], p);
@ -3264,6 +3276,14 @@ static int srv_iterate_initaddr(struct server *srv)
}
return return_code;
case SRV_IADDR_IP:
ipcpy(&srv->init_addr, &srv->addr);
if (return_code) {
Warning("parsing [%s:%d] : 'server %s' : could not resolve address '%s', falling back to configured address.\n",
srv->conf.file, srv->conf.line, srv->id, srv->hostname);
}
return return_code;
default: /* unhandled method */
break;
}