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 defaulthelm install greptimedb-operator greptime/greptimedb-operator -n default维护的 Helm 图表在 helm-charts 中。
3. 创建用户自己的 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 default4. 创建用户自己的 GreptimeDB 集群
创建 GreptimeDB 集群：
shell
helm install mycluster greptime/greptimedb-cluster -n defaulthelm install mycluster greptime/greptimedb-cluster -n default如果用户之前已经有了 etcd 集群，可以这样对其进行配置：
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 语句来访问 GreptimeDB 集群：
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 &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.iogtctl
gtctl，g-t-control，是一个用于管理 GreptimeDB 集群的命令行工具。gtctl 是集成了 GreptimeDB 集群的多种操作的多合一 binary。
1. 创建测试版 Kubernetes 集群
通过 kind 来创建测试版 Kubernetes 集群：
shell
kind create clusterkind create cluster2. 安装 gtctl
目前，gtctl 支持 x86_64 和 ARM64 架构的 Linux 和 Darwin 系统。
shell
curl -L https://raw.githubusercontent.com/greptimeteam/gtctl/develop/hack/install.sh | shcurl -L https://raw.githubusercontent.com/greptimeteam/gtctl/develop/hack/install.sh | sh3. 创建用户自己的 GreptimeDB 集群
shell
./gtctl cluster create mycluster -n default./gtctl cluster create mycluster -n default安装完成后，gtctl 会创建以下内容：
etcdclusterfrontendinstances (default replicas is 1)datanodeinstances(default replicas is 3)metasrvservice(default replicas is 1)
可以通过 kubectl port-forward 命令来转发前端请求：
shell
kubectl port-forward svc/mycluster-frontend 4002:4002 > connections.out &kubectl port-forward svc/mycluster-frontend 4002:4002 > connections.out &4. 清除 GreptimeDB 集群
shell
./gtctl cluster delete mycluster --tear-down-etcd./gtctl cluster delete mycluster --tear-down-etcd