From 232cdb95ab9b5ea92c3351fcac4a414b35a3ec55 Mon Sep 17 00:00:00 2001
From: antirez <antirez@gmail.com>
Date: Mon, 18 Nov 2013 16:02:58 +0100
Subject: [PATCH] Sentinel: added config options useful to take state on config
 rewrite.

We'll use CONFIG REWRITE (internally) in order to store the new
configuration of a Sentinel after the internal state changes. In order
to do so, we need configuration options (that usually the user will not
touch at all) about config epoch of the master, Sentinels and Slaves
known for this master, and so forth.
---
 src/sentinel.c | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)

diff --git a/src/sentinel.c b/src/sentinel.c
index 18a7058e..49261470 100644
--- a/src/sentinel.c
+++ b/src/sentinel.c
@@ -1312,6 +1312,35 @@ char *sentinelHandleConfiguration(char **argv, int argc) {
         ri = sentinelGetMasterByName(argv[1]);
         if (!ri) return "No such master with specified name.";
         ri->auth_pass = sdsnew(argv[2]);
+    } else if (!strcasecmp(argv[0],"config-epoch") && argc == 3) {
+        /* config-epoch <name> <epoch> */
+        ri = sentinelGetMasterByName(argv[1]);
+        if (!ri) return "No such master with specified name.";
+        ri->config_epoch = strtoull(argv[2],NULL,10);
+        if (ri->config_epoch > sentinel.current_epoch)
+            sentinel.current_epoch = ri->config_epoch;
+    } else if (!strcasecmp(argv[0],"slave") && argc == 3) {
+        sentinelRedisInstance *slave;
+
+        /* slave <name> <ip> <port> */
+        ri = sentinelGetMasterByName(argv[1]);
+        if (!ri) return "No such master with specified name.";
+        if ((slave = createSentinelRedisInstance(NULL,SRI_SLAVE,argv[2],
+                    atoi(argv[3]), ri->quorum, ri)) == NULL)
+        {
+            return "Wrong hostname or port for slave.";
+        }
+    } else if (!strcasecmp(argv[0],"sentinel") && argc == 3) {
+        sentinelRedisInstance *si;
+
+        /* sentinel <name> <ip> <port> */
+        ri = sentinelGetMasterByName(argv[1]);
+        if (!ri) return "No such master with specified name.";
+        if ((si = createSentinelRedisInstance(NULL,SRI_SENTINEL,argv[2],
+                    atoi(argv[3]), ri->quorum, ri)) == NULL)
+        {
+            return "Wrong hostname or port for sentinel.";
+        }
     } else {
         return "Unrecognized sentinel configuration statement.";
     }