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[MEDIUM] add a maintenance mode to servers

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This is a first attempt to add a maintenance mode on servers, using
the stat socket (in admin level).

It can be done with the following command :
   - disable server <backend>/<server>
   - enable  server <backend>/<server>

In this mode, no more checks will be performed on the server and it
will be marked as a special DOWN state (MAINT).

If some servers were tracking it, they'll go DOWN until the server
leaves the maintenance mode. The stats page and the CSV export also
display this special state.

This can be used to disable the server in haproxy before doing some
operations on this server itself. This is a good complement to the
"http-check disable-on-404" keyword and works in TCP mode.
This commit is contained in:
Cyril Bont
2010-01-31 22:34:03 +01:00
committed by Willy Tarreau
parent 844a7e76d2
commit cd19e51b05
5 changed files with 195 additions and 29 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
include/proto/checks.h
View File

@@ -27,6 +27,8 @@
const char *get_check_status_description(short check_status);
const char *get_check_status_info(short check_status);
void set_server_down(struct server *s);
void set_server_up(struct server *s);
struct task *process_chk(struct task *t);
int start_checks();
void health_adjust(struct server *s, short status);

2
include/types/server.h
View File

@@ -47,7 +47,7 @@
#define SRV_CHECKED 0x0010 /* this server needs to be checked */
#define SRV_GOINGDOWN 0x0020 /* this server says that it's going down (404) */
#define SRV_WARMINGUP 0x0040 /* this server is warming up after a failure */
/* unused: 0x0080 */
#define SRV_MAINTAIN 0x0080 /* this server is in maintenance mode */
#define SRV_TPROXY_ADDR 0x0100 /* bind to this non-local address to reach this server */
#define SRV_TPROXY_CIP 0x0200 /* bind to the client's IP address to reach this server */
#define SRV_TPROXY_CLI 0x0300 /* bind to the client's IP+port to reach this server */