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条件

# 安装时需要确保 K8S 集群正在运行,并且挂载了 GlusterFS 集群文件系统

# 相关文档: K8S.md、GlusterFS.md

# 在各个主机检查 GlusterFS 集群文件系统

df -h /mnt/gluster-gv0

# 正常输出

Filesystem      Size  Used Avail Use% Mounted on
gfs:/gv0         48T  835G   48T   2% /mnt/gluster-gv0

以下操作均在 K8S 第一个节点,即 Master 节点 192.168.1.21 执行

准备

# 准备 Fiber 应用,以 Winter-fiber 为例,复制到 /mnt/gluster-gv0/k8s/fiber 目录下

# 如果访问 GitHub.com 需要代理在此设置
# export http_proxy=http://192.168.1.109:3128/
# export https_proxy=http://192.168.1.109:3128/

(
	if [ ! -d ~/Winter-fiber ]; then cd ~/ ; git clone https://github.com/AndyInAi/Winter-fiber.git; fi ;

	chmod +x ~/Winter-fiber/Winter-fiber

	mkdir -p /mnt/gluster-gv0/k8s/fiber ;

	cp -f -r ~/Winter-fiber /mnt/gluster-gv0/k8s/fiber/ ;
)

配置

# 生成启动脚本

(
	mkdir -p /mnt/gluster-gv0/k8s/fiber

	echo '#!/bin/bash

		cp -f -r /mnt/fiber/Winter-fiber ~/

		cd ~/Winter-fiber

		chmod +x Winter-fiber

		./Winter-fiber
		
		# sleep 88888

	'> /mnt/gluster-gv0/k8s/fiber/start 
	
	chmod +x /mnt/gluster-gv0/k8s/fiber/start
)

部署

# 副本:8 个

# 端口:30020

(
	mkdir -p /mnt/gluster-gv0/k8s/fiber;

	kubectl get namespace winter > /dev/null 2>&1 || kubectl create namespace winter;

	echo '
                    apiVersion: apps/v1
                    kind: Deployment
                    metadata:
                      labels:
                        app: fiber
                      name: fiber
                      namespace: winter
                    spec:
                      replicas: 8
                      selector:
                        matchLabels:
                          app: fiber
                      template:
                        metadata:
                          labels:
                            app: fiber
                        spec:
                          volumes:
                            - name: k8s
                              hostPath:
                                path: /mnt/gluster-gv0/k8s
                          containers:
                            - image: ubuntu
                              imagePullPolicy: IfNotPresent
                              name: fiber
                              volumeMounts:
                                - name: k8s
                                  mountPath: /mnt
                              command: ["/mnt/fiber/start"]
	' > ~/fiber.yml;

	echo '
		apiVersion: v1
		kind: Service
		metadata:
		  name: fiber
		  namespace: winter
		spec:
		  selector:
		    app: fiber
		  type: LoadBalancer
		  ports:
		    - nodePort: 30020
		      port: 8080
		      protocol: TCP
		      targetPort: 8080
		  sessionAffinity: ClientIP
	' > fiber-port.yml;
	sed -i 's/\t/        /g' ~/fiber.yml;
	sed -i 's/\t/        /g' ~/fiber-port.yml;
	
	kubectl apply -f ~/fiber.yml;
	kubectl apply -f ~/fiber-port.yml;
)

查看

kubectl get pod,svc,node -n winter -o wide

测试

curl http://192.168.1.22:30020/
curl http://192.168.1.23:30020/
curl http://192.168.1.24:30020/

# 使用浏览器打开

http://192.168.1.24:30020/
http://192.168.1.23:30020/
http://192.168.1.22:30020/

扩缩

# 静态扩缩,指定 pod 数量,如 12

kubectl scale --replicas=12 -f ~/fiber.yml

# 动态扩缩,指定最小和最大 pod 数量

kubectl autoscale  --max=16 --min=4 -f ~/fiber.yml