Kubernetes
GreptimeDB Operator
通过利用 Operator pattern，GreptimeDB Operator 可以有效管理 Kubernetes 上的 GreptimeDB 集群。这个 operator 可以抽象出维护高可用 GreptimeDB 集群的模式。
1. 创建测试版 Kubernetes 集群
用户可以通过 kind 创建测试版 Kubernetes 集群：
shell
kind create clusterkind create cluster2. 通过 Helm 安装 GreptimeDB Operator
请先安装 Helm，然后通过下面的命令在默认命名空间安装 greptimedb-operator：
shell
helm repo add greptime https://greptimeteam.github.io/helm-charts/helm repo add greptime https://greptimeteam.github.io/helm-charts/shell
helm repo updatehelm repo updateshell
helm install greptimedb-operator greptime/greptimedb-operator -n default --develhelm install greptimedb-operator greptime/greptimedb-operator -n default --devel维护的 Helm 图表在 helm-charts 中。
3. 创建用户自己的 GreptimeDB 集群
为 GreptimeDB 创建 etcd cluster 集群
shell
helm install etcd oci://registry-1.docker.io/bitnamicharts/etcd \
--set replicaCount=3 \
--set auth.rbac.create=false \
--set auth.rbac.token.enabled=false \
-n defaulthelm install etcd oci://registry-1.docker.io/bitnamicharts/etcd \
--set replicaCount=3 \
--set auth.rbac.create=false \
--set auth.rbac.token.enabled=false \
-n default创建 GreptimeDB 集群。该集群会使用上一步创建的 etcd 集群：
shell
helm install mycluster greptime/greptimedb-cluster -n defaulthelm install mycluster greptime/greptimedb-cluster -n default如果你拥有自己的 etcd 集群，可以通过设置 etcdEndpoints 来使用自定义的 etcd 集群：
shell
helm install mycluster greptime/greptimedb-cluster \
--set etcdEndpoints=<your-etcd-cluster-endpoints> \
-n defaulthelm install mycluster greptime/greptimedb-cluster \
--set etcdEndpoints=<your-etcd-cluster-endpoints> \
-n default安装之后，可以通过 kubectl port-forward 语句来转发 GreptimeDB 集群的 MySQL 协议端口：
shell
# You can use the MySQL client to connect the cluster, for example: 'mysql -h 127.0.0.1 -P 4002'.
kubectl port-forward svc/mycluster-frontend 4002:4002 > connections.out &
# You can use the PostgreSQL client to connect the cluster, for example: 'psql -h 127.0.0.1 -p 4003 -d public'.
kubectl port-forward svc/mycluster-frontend 4003:4003 > connections.out &# You can use the MySQL client to connect the cluster, for example: 'mysql -h 127.0.0.1 -P 4002'.
kubectl port-forward svc/mycluster-frontend 4002:4002 > connections.out &
# You can use the PostgreSQL client to connect the cluster, for example: 'psql -h 127.0.0.1 -p 4003 -d public'.
kubectl port-forward svc/mycluster-frontend 4003:4003 > connections.out &然后可以通过 MySQL 客户端访问集群
4. 清除 GreptimeDB 集群
可以通过以下命令卸载 operator 和集群：
shell
# Uninstall the cluster.
helm uninstall mycluster -n default# Uninstall the cluster.
helm uninstall mycluster -n defaultshell
# Uninstall etcd.
helm uninstall etcd -n default# Uninstall etcd.
helm uninstall etcd -n defaultshell
# Uninstall the operator.
helm uninstall greptimedb-operator -n default# Uninstall the operator.
helm uninstall greptimedb-operator -n defaultshell
# Delete crds.
kubectl delete crds greptimedbclusters.greptime.io# Delete crds.
kubectl delete crds greptimedbclusters.greptime.io