KES-Operator：K8s 数据库集群自动化运维方案

文章目录

• • 每日一句正能量
  • 前言
  • KES-Operator：让KES集群管理更加贴合K8s管理方式
  • 从集群创建到运行维护，覆盖KES常用管理场景

每日一句正能量

真正的成熟，是知世故而不世故，是温柔的看待这个世界的不完美。 在不完美中依然选择爱与善意，是强大的表现。

前言

随着越来越多业务系统运行在Kubernetes环境中，应用的部署和资源管理方式正在发生变化。作为典型的有状态应用，数据库在进入Kubernetes环境后，如何适配Kubernetes的管理方式，也给原有运维模式带来了新的要求。

在Kubernetes环境中，数据库集群管理不仅涉及数据库自身，还需要协调计算、存储、网络等相关资源。随着集群规模扩大，依赖人工完成部署、配置和维护，操作也会更加复杂。

针对用户在Kubernetes环境下管理KES集群的实际需求，电科金仓正式推出KES K8s运维工具——KES-Operator。KES-Operator基于Kubernetes Operator技术和声明式管理方式，将KES集群纳入Kubernetes管理体系，提供集群部署、状态管理、扩缩容、物理备份等能力，用户可以按照Kubernetes的管理方式完成KES集群部署和日常运维。

为了更直观地理解 KES-Operator 带来的变化，下面从部署方式、状态管理、扩缩容、备份监控等维度，对比传统数据库运维方式与使用 KES-Operator 在 Kubernetes 中运维的差异：

KES-Operator：让KES集群管理更加贴合K8s管理方式

KES-Operator基于Kubernetes Operator模式设计，通过自定义资源（CRD）扩展Kubernetes管理能力，将KES集群纳入Kubernetes原生管理体系。用户通过配置定义KES集群的期望状态，KES-Operator持续检查集群实际状态，并自动协调相关Kubernetes资源，使实际状态与配置保持一致。

这样的话，KES集群就可以按照Kubernetes原有的资源管理方式进行部署和维护，减少运维人员反复执行人工操作。

KES-Operator整体架构

下面是 KES-Operator 的核心能力思维导图：

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KES-Operator

自动化部署

声明式配置

自动创建资源

减少人工操作

持续状态管理

控制器机制

状态监测比对

自动协调资源

灵活扩缩容

集群扩容

集群缩容

按需调整节点

物理备份与监控

物理备份任务

KMonitor监控

统一集中管理

从集群创建到运行维护，覆盖KES常用管理场景

围绕KES集群在Kubernetes环境中的部署和运行维护，KES-Operator提供了以下管理能力。

1

自动化部署，让KES集群快速运行

在Kubernetes环境中，数据库集群部署涉及多个资源对象配置。KES-Operator采用声明式管理方式，用户只需通过配置文件定义KES集群期望状态，配置完成后，由KES-Operator自动创建相关资源，减少人工逐项配置。

KES集群部署过程

2

持续状态管理，让数据库集群保持目标状态

数据库集群部署完成后，运行过程中的状态维护同样重要。KES-Operator通过Kubernetes控制器机制，持续监测数据库集群实际运行状态，并与用户定义的期望状态进行比对。当实际状态与期望状态出现偏差时，KES-Operator根据配置协调相关Kubernetes资源，使KES集群保持稳定运行。通过持续状态管理，减少人工检查和处理。

数据库集群状态调整过程

3

灵活扩缩容，满足业务变化需求

随着业务变化，数据库资源需求也会随之调整。KES-Operator支持KES集群扩容与缩容管理，用户可以根据实际需求调整集群节点规模，修改集群配置后，KES-Operator根据新的配置完成相应资源调整。

KES集群扩缩容过程

4

物理备份与监控管理

要保障数据库长期稳定运行，除了日常状态管理，还需要完善的数据保护与监控能力。KES-Operator支持KES物理备份管理，用户可以通过配置创建和管理备份任务；同时支持KMonitor监控组件管理，用于查看KES集群运行状态。备份任务和监控信息都可以在Kubernetes环境中统一管理，日常维护更加集中。

备份任务展示

监控展示

KES-Operator正式发布后，KES集群可以纳入Kubernetes体系进行管理，部署、状态维护、扩缩容、备份和监控等操作也有了统一的管理方式。未来，电科金仓将继续完善KES-Operator相关能力，满足KES在Kubernetes环境中的更多使用和运维需求。

KES-Operator现已正式发布。

下面通过一个示例，演示如何使用 KES-Operator 声明式地部署一个 KES 集群：

apiVersion: kes.kingbase.com/v1
kind: KesCluster
metadata:
name: kes–cluster–demo
namespace: kes–system
spec:
# 集群节点规模
replicas: 3

# 数据库版本
version: "V8"

# 计算资源
resources:
requests:
cpu: "2"
memory: 4Gi
limits:
cpu: "4"
memory: 8Gi

# 存储配置
storage:
storageClassName: standard
size: 100Gi

# 备份配置
backup:
enabled: true
schedule: "0 2 * * *"
retention: 7

# 监控配置
monitor:
enabled: true
kMonitorVersion: "1.0"

部署完成后，可以通过以下命令查看集群状态：

# 查看 KES 集群列表
kubectl get kesclusters -n kes-system

# 查看 KES 集群详细信息
kubectl describe kescluster kes-cluster-demo -n kes-system

# 查看集群 Pod 状态
kubectl get pods -n kes-system -l app=kes-cluster-demo

当业务增长需要扩容时，只需修改配置中的 replicas 字段并重新应用：

# 将集群节点从 3 个扩容到 5 个
kubectl patch kescluster kes-cluster-demo -n kes-system \\
–type merge -p '{"spec":{"replicas":5}}'

KES-Operator 会自动感知配置变更，并协调相关 Kubernetes 资源完成扩缩容操作，整个过程无需人工干预。

转载自：https://blog.csdn.net/u014727709/article/details/164431755 欢迎 👍点赞✍评论⭐收藏，欢迎指正