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This commit is contained in:
zliang 2023-08-22 11:10:56 -06:00
parent 6375e919b9
commit cec570fdf1
1 changed files with 9 additions and 4 deletions
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13
src/modules/keydb_modstatsd/modmain.cpp
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@ -67,6 +67,8 @@ public:
/* constants */
static time_t c_infoUpdateSeconds = 10;
// the current Redis Cluster setup we configure replication factor as 2, each non-empty master node should have 2 replicas, given that there are 3 zones in each regions
static const int EXPECTED_NUMBER_OF_REPLICAS = 2;
StatsdClientWrapper *g_stats = nullptr;
std::string m_strPrefix { "keydb" };
@ -544,17 +546,19 @@ void emit_system_free_memory() {
}
}
void emit_non_empty_primary_with_less_than_2_connected_replicas_error_metrics(struct RedisModuleCtx *ctx, long long keys) {
void emit_metrics_for_insufficient_replicas(struct RedisModuleCtx *ctx, long long keys) {
// non-empty
if (keys <= 0) {
return;
}
RedisModuleCallReply *reply = RedisModule_Call(ctx, "ROLE", "");
if (RedisModule_CallReplyType(reply) != REDISMODULE_REPLY_ARRAY) {
RedisModule_FreeCallReply(reply);
return;
}
RedisModuleCallReply *roleReply = RedisModule_CallReplyArrayElement(reply, 0);
if (RedisModule_CallReplyType(roleReply) != REDISMODULE_REPLY_STRING) {
RedisModule_FreeCallReply(reply);
return;
}
size_t len;
@ -563,10 +567,11 @@ void emit_non_empty_primary_with_less_than_2_connected_replicas_error_metrics(st
if (strncmp(role, "master", len) == 0) {
RedisModuleCallReply *replicasReply = RedisModule_CallReplyArrayElement(reply, 2);
// check if there are less than 2 connected replicas
if (RedisModule_CallReplyLength(replicasReply) < 2) {
g_stats->increment("hasLessThan2ConnectedReplicas_error", 1);
if (RedisModule_CallReplyLength(replicasReply) < EXPECTED_NUMBER_OF_REPLICAS) {
g_stats->increment("lessThanExpectedReplicas_error", 1);
}
}
RedisModule_FreeCallReply(reply);
}
void event_cron_handler(struct RedisModuleCtx *ctx, RedisModuleEvent eid, uint64_t subevent, void *data) {
@ -652,7 +657,7 @@ void event_cron_handler(struct RedisModuleCtx *ctx, RedisModuleEvent eid, uint64
RedisModule_Log(ctx, REDISMODULE_LOGLEVEL_DEBUG, "Emitting metric \"keys\": %llu", keys);
g_stats->timing("emit_keys_metric_time_taken_us", ustime() - commandStartTime);
emit_non_empty_primary_with_less_than_2_connected_replicas_error_metrics(ctx, keys);
emit_metrics_for_insufficient_replicas(ctx, keys);
g_stats->timing("metrics_time_taken_us", ustime() - startTime);