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cluster_status_metrics.go
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/
cluster_status_metrics.go
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package metrics
import (
"context"
"github.com/3scale-ops/saas-operator/pkg/redis/client"
"github.com/3scale-ops/saas-operator/pkg/redis/sharded"
"github.com/prometheus/client_golang/prometheus"
"sigs.k8s.io/controller-runtime/pkg/metrics"
)
var (
serverInfo = prometheus.NewGaugeVec(
prometheus.GaugeOpts{
Name: "server_info",
Namespace: "saas_redis_cluster_status",
Help: "redis cluster member info",
},
[]string{"resource", "shard", "redis_server_host", "redis_server_alias", "role", "read_only"})
roSlaveCount = prometheus.NewGaugeVec(
prometheus.GaugeOpts{
Name: "ro_slave_count",
Namespace: "saas_redis_cluster_status",
Help: "read-only slave count",
},
[]string{"resource", "shard"},
)
rwSlaveCount = prometheus.NewGaugeVec(
prometheus.GaugeOpts{
Name: "rw_slave_count",
Namespace: "saas_redis_cluster_status",
Help: "read-write slave count",
},
[]string{"resource", "shard"},
)
)
func init() {
// Register custom metrics with the global prometheus registry
metrics.Registry.MustRegister(serverInfo, roSlaveCount, rwSlaveCount)
}
func FromShardedCluster(ctx context.Context, cluster *sharded.Cluster, refresh bool, resource string) error {
if refresh {
err := cluster.SentinelDiscover(ctx, sharded.SlaveReadOnlyDiscoveryOpt)
if err != nil {
return err
}
}
for _, shard := range cluster.Shards {
roslave := 0
rwslave := 0
for _, server := range shard.Servers {
ro, ok := server.Config["slave-read-only"]
if !ok {
ro = "no"
}
serverInfo.With(prometheus.Labels{"resource": resource, "shard": shard.Name,
"redis_server_host": server.ID(), "redis_server_alias": server.GetAlias(),
"role": string(server.Role), "read_only": ro,
}).Set(float64(1))
if server.Role == client.Slave {
if ro == "yes" {
roslave++
} else {
rwslave++
}
}
}
roSlaveCount.With(prometheus.Labels{"resource": resource, "shard": shard.Name}).Set(float64(roslave))
rwSlaveCount.With(prometheus.Labels{"resource": resource, "shard": shard.Name}).Set(float64(rwslave))
}
return nil
}