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Cluster Manager: further improvements to "fix":

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- clusterManagerFixOpenSlot: ensure that the
  slot is unassigned before ADDSLOTS
- clusterManagerFixSlotsCoverage: after cold
  migration, the slot configuration
  is now updated on all the nodes.
This commit is contained in:
artix 2018-11-03 12:04:59 +01:00
parent d6f0a9ac72
commit 18ddbf0352
1 changed files with 49 additions and 10 deletions
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59
src/redis-cli.c
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@ -3589,10 +3589,17 @@ static int clusterManagerFixSlotsCoverage(char *all_slots) {
clusterManagerNode *n = node_n->value;
clusterManagerLogInfo(">>> Covering slot %s with %s:%d\n",
slot, n->ip, n->port);
/* Ensure the slot is not already assigned. */
redisReply *r = CLUSTER_MANAGER_COMMAND(n,
"CLUSTER DELSLOTS %s", slot);
if (r) freeReplyObject(r);
r = CLUSTER_MANAGER_COMMAND(n,
"CLUSTER ADDSLOTS %s", slot);
if (!clusterManagerCheckRedisReply(n, r, NULL)) fixed = -1;
if (r) freeReplyObject(r);
r = CLUSTER_MANAGER_COMMAND(n, "CLUSTER BUMPEPOCH");
if (!clusterManagerCheckRedisReply(n, r, NULL)) fixed = -1;
if (r) freeReplyObject(r);
if (fixed < 0) goto cleanup;
/* Since CLUSTER ADDSLOTS succeeded, we also update the slot
* info into the node struct, in order to keep it synced */
@ -3620,10 +3627,17 @@ static int clusterManagerFixSlotsCoverage(char *all_slots) {
clusterManagerNode *n = fn->value;
clusterManagerLogInfo(">>> Covering slot %s with %s:%d\n",
slot, n->ip, n->port);
/* Ensure the slot is not already assigned. */
redisReply *r = CLUSTER_MANAGER_COMMAND(n,
"CLUSTER DELSLOTS %s", slot);
if (r) freeReplyObject(r);
r = CLUSTER_MANAGER_COMMAND(n,
"CLUSTER ADDSLOTS %s", slot);
if (!clusterManagerCheckRedisReply(n, r, NULL)) fixed = -1;
if (r) freeReplyObject(r);
r = CLUSTER_MANAGER_COMMAND(n, "CLUSTER BUMPEPOCH");
if (!clusterManagerCheckRedisReply(n, r, NULL)) fixed = -1;
if (r) freeReplyObject(r);
if (fixed < 0) goto cleanup;
/* Since CLUSTER ADDSLOTS succeeded, we also update the slot
* info into the node struct, in order to keep it synced */
@ -3657,7 +3671,11 @@ static int clusterManagerFixSlotsCoverage(char *all_slots) {
clusterManagerLogInfo(">>> Covering slot %s moving keys "
"to %s:%d\n", slot,
target->ip, target->port);
/* Ensure the slot is not already assigned. */
redisReply *r = CLUSTER_MANAGER_COMMAND(target,
"CLUSTER DELSLOTS %s", slot);
if (r) freeReplyObject(r);
r = CLUSTER_MANAGER_COMMAND(target,
"CLUSTER ADDSLOTS %s", slot);
if (!clusterManagerCheckRedisReply(target, r, NULL)) fixed = -1;
if (r) freeReplyObject(r);
@ -3666,6 +3684,9 @@ static int clusterManagerFixSlotsCoverage(char *all_slots) {
"CLUSTER SETSLOT %s %s", slot, "STABLE");
if (!clusterManagerCheckRedisReply(target, r, NULL)) fixed = -1;
if (r) freeReplyObject(r);
r = CLUSTER_MANAGER_COMMAND(target, "CLUSTER BUMPEPOCH");
if (!clusterManagerCheckRedisReply(target, r, NULL)) fixed = -1;
if (r) freeReplyObject(r);
if (fixed < 0) goto cleanup;
/* Since CLUSTER ADDSLOTS succeeded, we also update the slot
* info into the node struct, in order to keep it synced */
@ -3768,7 +3789,7 @@ static int clusterManagerFixOpenSlot(int slot) {
sds migrating_slot = n->migrating[i];
if (atoi(migrating_slot) == slot) {
char *sep = (listLength(migrating) == 0 ? "" : ",");
migrating_str = sdscatfmt(migrating_str, "%s%S:%u",
migrating_str = sdscatfmt(migrating_str, "%s%s:%u",
sep, n->ip, n->port);
listAddNodeTail(migrating, n);
is_migrating = 1;
@ -3781,7 +3802,7 @@ static int clusterManagerFixOpenSlot(int slot) {
sds importing_slot = n->importing[i];
if (atoi(importing_slot) == slot) {
char *sep = (listLength(importing) == 0 ? "" : ",");
importing_str = sdscatfmt(importing_str, "%s%S:%u",
importing_str = sdscatfmt(importing_str, "%s%s:%u",
sep, n->ip, n->port);
listAddNodeTail(importing, n);
is_importing = 1;
@ -3809,8 +3830,10 @@ static int clusterManagerFixOpenSlot(int slot) {
if (!success) goto cleanup;
}
}
printf("Set as migrating in: %s\n", migrating_str);
printf("Set as importing in: %s\n", importing_str);
if (sdslen(migrating_str) > 0)
printf("Set as migrating in: %s\n", migrating_str);
if (sdslen(importing_str) > 0)
printf("Set as importing in: %s\n", importing_str);
/* If there is no slot owner, set as owner the node with the biggest
* number of keys, among the set of migrating / importing nodes. */
if (owner == NULL) {
@ -3872,7 +3895,9 @@ static int clusterManagerFixOpenSlot(int slot) {
* in migrating state, since migrating is a valid state only for
* slot owners. */
if (listLength(owners) > 1) {
owner = clusterManagerGetNodeWithMostKeysInSlot(owners, slot, NULL);
/* Owner cannot be NULL at this point, since if there are more owners,
* the owner has been set in the previous condition (owner == NULL). */
assert(owner != NULL);
listRewind(owners, &li);
redisReply *reply = NULL;
while ((ln = listNext(&li)) != NULL) {
@ -3897,10 +3922,6 @@ static int clusterManagerFixOpenSlot(int slot) {
/* Ensure that the node is not in the migrating list. */
clusterManagerRemoveNodeFromList(migrating, n);
}
reply = CLUSTER_MANAGER_COMMAND(owner, "CLUSTER BUMPEPOCH");
success = clusterManagerCheckRedisReply(owner, reply, NULL);
if (reply) freeReplyObject(reply);
if (!success) goto cleanup;
}
int move_opts = CLUSTER_MANAGER_OPT_VERBOSE;
/* Case 1: The slot is in migrating state in one node, and in
@ -3908,6 +3929,9 @@ static int clusterManagerFixOpenSlot(int slot) {
if (listLength(migrating) == 1 && listLength(importing) == 1) {
clusterManagerNode *src = listFirst(migrating)->value;
clusterManagerNode *dst = listFirst(importing)->value;
clusterManagerLogInfo(">>> Case 1: Moving slot %d from "
"%s:%d to %s:%d\n", slot,
src->ip, src->port, dst->ip, dst->port);
success = clusterManagerMoveSlot(src, dst, slot, move_opts, NULL);
}
/* Case 2: There are multiple nodes that claim the slot as importing,
@ -3915,7 +3939,7 @@ static int clusterManagerFixOpenSlot(int slot) {
* the slot. In this case we just move all the keys to the owner
* according to the configuration. */
else if (listLength(migrating) == 0 && listLength(importing) > 0) {
clusterManagerLogInfo(">>> Moving all the %d slot keys to its "
clusterManagerLogInfo(">>> Case 2: Moving all the %d slot keys to its "
"owner %s:%d\n", slot, owner->ip, owner->port);
move_opts |= CLUSTER_MANAGER_OPT_COLD;
listRewind(importing, &li);
@ -3933,6 +3957,18 @@ static int clusterManagerFixOpenSlot(int slot) {
if (r) freeReplyObject(r);
if (!success) goto cleanup;
}
/* Since the slot has been moved in "cold" mode, ensure that all the
* other nodes update their own configuration about the slot itself. */
listRewind(cluster_manager.nodes, &li);
while ((ln = listNext(&li)) != NULL) {
clusterManagerNode *n = ln->value;
if (n == owner) continue;
redisReply *r = CLUSTER_MANAGER_COMMAND(n,
"CLUSTER SETSLOT %d %s %s", slot, "NODE", owner->name);
success = clusterManagerCheckRedisReply(n, r, NULL);
if (r) freeReplyObject(r);
if (!success) goto cleanup;
}
} else {
int try_to_close_slot = (listLength(importing) == 0 &&
listLength(migrating) == 1);
@ -3955,6 +3991,8 @@ static int clusterManagerFixOpenSlot(int slot) {
* in the middle. */
if (try_to_close_slot) {
clusterManagerNode *n = listFirst(migrating)->value;
clusterManagerLogInfo(">>> Case 3: Closing slot %d on %s:%d\n",
slot, n->ip, n->port);
redisReply *r = CLUSTER_MANAGER_COMMAND(n, "CLUSTER SETSLOT %d %s",
slot, "STABLE");
success = clusterManagerCheckRedisReply(n, r, NULL);
@ -4083,6 +4121,7 @@ static int clusterManagerCheckCluster(int quiet) {
result = 0;
if (do_fix/* && result*/) {
dictType dtype = clusterManagerDictType;
dtype.keyDestructor = dictSdsDestructor;
dtype.valDestructor = dictListDestructor;
clusterManagerUncoveredSlots = dictCreate(&dtype, NULL);
int fixed = clusterManagerFixSlotsCoverage(slots);