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Redis 6 comes with sentinel, which allows Redis to run as a A/P service with automatic failover. Update the redis controller to support deploying Redis as a standalone 1-pod Redis service, or a 3-pods A/P clustered service. Each redis pod hosts a container that runs the redis server, and another container that runs a sentinel for the quorated cluster management.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,134 @@ | ||
| package redis | ||
|
|
||
| import ( | ||
| "strconv" | ||
|
|
||
| redisv1beta1 "github.com/openstack-k8s-operators/infra-operator/apis/redis/v1beta1" | ||
| labels "github.com/openstack-k8s-operators/lib-common/modules/common/labels" | ||
| appsv1 "k8s.io/api/apps/v1" | ||
| corev1 "k8s.io/api/core/v1" | ||
| metav1 "k8s.io/apimachinery/pkg/apis/meta/v1" | ||
| "k8s.io/apimachinery/pkg/util/intstr" | ||
| ) | ||
|
|
||
| // Deployment returns a Deployment resource for the Redis CR | ||
| func StatefulSet(r *redisv1beta1.Redis) *appsv1.StatefulSet { | ||
| matchls := map[string]string{ | ||
| "app": "redis", | ||
| "cr": "redis-" + r.Name, | ||
| "owner": "infra-operator", | ||
| } | ||
| ls := labels.GetLabels(r, "redis", matchls) | ||
|
|
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| livenessProbe := &corev1.Probe{ | ||
| // TODO might need tuning | ||
| TimeoutSeconds: 5, | ||
| PeriodSeconds: 3, | ||
| InitialDelaySeconds: 3, | ||
| } | ||
| readinessProbe := &corev1.Probe{ | ||
| // TODO might need tuning | ||
| TimeoutSeconds: 5, | ||
| PeriodSeconds: 5, | ||
| InitialDelaySeconds: 5, | ||
| } | ||
| sentinelLivenessProbe := &corev1.Probe{ | ||
| // TODO might need tuning | ||
| TimeoutSeconds: 5, | ||
| PeriodSeconds: 3, | ||
| InitialDelaySeconds: 3, | ||
| } | ||
| sentinelReadinessProbe := &corev1.Probe{ | ||
| // TODO might need tuning | ||
| TimeoutSeconds: 5, | ||
| PeriodSeconds: 5, | ||
| InitialDelaySeconds: 5, | ||
| } | ||
|
|
||
| // TODO might want to disable probes in 'Debug' mode | ||
| livenessProbe.TCPSocket = &corev1.TCPSocketAction{ | ||
| Port: intstr.IntOrString{Type: intstr.Int, IntVal: int32(6379)}, | ||
| } | ||
| readinessProbe.TCPSocket = &corev1.TCPSocketAction{ | ||
| Port: intstr.IntOrString{Type: intstr.Int, IntVal: int32(6379)}, | ||
| } | ||
| sentinelLivenessProbe.TCPSocket = &corev1.TCPSocketAction{ | ||
| Port: intstr.IntOrString{Type: intstr.Int, IntVal: int32(26379)}, | ||
| } | ||
| sentinelReadinessProbe.TCPSocket = &corev1.TCPSocketAction{ | ||
| Port: intstr.IntOrString{Type: intstr.Int, IntVal: int32(26379)}, | ||
| } | ||
| name := r.Name + "-" + "redis" | ||
| sts := &appsv1.StatefulSet{ | ||
| ObjectMeta: metav1.ObjectMeta{ | ||
| Name: name, | ||
| Namespace: r.Namespace, | ||
| }, | ||
| Spec: appsv1.StatefulSetSpec{ | ||
| ServiceName: name, | ||
| Replicas: r.Spec.Replicas, | ||
| Selector: &metav1.LabelSelector{ | ||
| MatchLabels: ls, | ||
| }, | ||
| Template: corev1.PodTemplateSpec{ | ||
| ObjectMeta: metav1.ObjectMeta{ | ||
| Labels: ls, | ||
| }, | ||
| Spec: corev1.PodSpec{ | ||
| ServiceAccountName: r.RbacResourceName(), | ||
| Containers: []corev1.Container{{ | ||
| Image: r.Spec.ContainerImage, | ||
| Command: []string{"/var/lib/operator-scripts/start_redis_replication.sh"}, | ||
| Name: "redis", | ||
| Env: []corev1.EnvVar{{ | ||
| Name: "KOLLA_CONFIG_STRATEGY", | ||
| Value: "COPY_ALWAYS", | ||
| }}, | ||
| VolumeMounts: getRedisVolumeMounts(), | ||
| Ports: []corev1.ContainerPort{{ | ||
| ContainerPort: 6379, | ||
| Name: "redis", | ||
| }}, | ||
| LivenessProbe: &corev1.Probe{ | ||
| ProbeHandler: corev1.ProbeHandler{ | ||
| Exec: &corev1.ExecAction{ | ||
| Command: []string{"/var/lib/operator-scripts/redis_probe.sh", "liveness"}, | ||
| }, | ||
| }, | ||
| }, | ||
| ReadinessProbe: &corev1.Probe{ | ||
| ProbeHandler: corev1.ProbeHandler{ | ||
| Exec: &corev1.ExecAction{ | ||
| Command: []string{"/var/lib/operator-scripts/redis_probe.sh", "readiness"}, | ||
| }, | ||
| }, | ||
| }, | ||
| }, { | ||
| Image: r.Spec.ContainerImage, | ||
| Command: []string{"/var/lib/operator-scripts/start_sentinel.sh"}, | ||
|
|
||
| Name: "sentinel", | ||
| Env: []corev1.EnvVar{{ | ||
| Name: "SENTINEL_QUORUM", | ||
| Value: strconv.Itoa((int(*r.Spec.Replicas) / 2) + 1), | ||
| }, { | ||
| Name: "KOLLA_CONFIG_STRATEGY", | ||
| Value: "COPY_ALWAYS", | ||
| }}, | ||
| VolumeMounts: getSentinelVolumeMounts(), | ||
| Ports: []corev1.ContainerPort{{ | ||
| ContainerPort: 26379, | ||
| Name: "sentinel", | ||
| }}, | ||
| ReadinessProbe: sentinelReadinessProbe, | ||
| LivenessProbe: sentinelLivenessProbe, | ||
| }, | ||
| }, | ||
| Volumes: getVolumes(r), | ||
| }, | ||
| }, | ||
| }, | ||
| } | ||
|
|
||
| return sts | ||
| } |
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