游戏、网关等服务借助Docker容器化并使用Kubernetes部署、更新等

本文首发在这里
请先看完

实现负责消息转发、推送的网关服务
负责网络、定时、坐下、站起、重连等，支持多类游戏的无锁房间

Docker容器化

Build and Push

docker build -t panshiqu/game_server:latest -t panshiqu/game_server:1 -t panshiqu/game_server:1.0 --build-arg SERVER=game_server .
docker build -t panshiqu/gate_server:latest -t panshiqu/gate_server:1 -t panshiqu/gate_server:1.0 --build-arg SERVER=gate_server .

docker push panshiqu/game_server:latest
docker push panshiqu/game_server:1
docker push panshiqu/game_server:1.0
docker push panshiqu/gate_server:latest
docker push panshiqu/gate_server:1
docker push panshiqu/gate_server:1.0

# 记得调整Import，这样才能编出两个不同的版本
docker build -t panshiqu/game_server:client --target client-final .
docker build -t panshiqu/gate_server:client --target client-final .
docker push panshiqu/game_server:client
docker push panshiqu/gate_server:client

验证

# 创建网络使用别名发现服务
docker network create server

docker run --network server --network-alias dice --name game_server -p 60001:60001 --rm panshiqu/game_server:1.0
docker run --network server --name gate_server -p 60006:60006 -e JWT_KEY=ZGVmYXVsdF9rZXk= --rm panshiqu/gate_server:1.0

cd ~/go/src/github.com/panshiqu/server/game_server/game/dice/client
go run main.go

docker run --network server --rm -it panshiqu/game_server:client ./dice_client -ip dice

Kubernetes容器编排

部署

kubectl apply -f https://raw.githubusercontent.com/panshiqu/server/main/k8s/dice.yaml

kubectl create secret generic jwt --from-literal=key=ZGVmYXVsdF9rZXk=

kubectl apply -f https://raw.githubusercontent.com/panshiqu/server/main/k8s/gate.yaml

minikube service gate --url # Mac DockerDesktop minikube print the port
cd ~/go/src/github.com/panshiqu/server/game_server/game/dice/client
go run main.go -port 60006

kubectl run dice -it --rm --restart Never --image panshiqu/gate_server:client
./dice_client -ip $GATE_SERVICE_HOST

EFK (Elasticsearch + Fluentd + Kibana)

方案取自以下官方文档

日志架构
Fluentd
快速开始系列：其中Elasticsearch和Kibana

kubectl create -f https://download.elastic.co/downloads/eck/2.14.0/crds.yaml

kubectl apply -f https://download.elastic.co/downloads/eck/2.14.0/operator.yaml

cat <<EOF | kubectl apply -f -
apiVersion: elasticsearch.k8s.elastic.co/v1
kind: Elasticsearch
metadata:
  name: quickstart
spec:
  version: 8.15.0
  nodeSets:
  - name: default
    count: 1
    config:
      node.store.allow_mmap: false
EOF
{% raw %}
kubectl get secret quickstart-es-elastic-user -o go-template='{{.data.elastic | base64decode}}'
{% endraw %}
cat <<EOF | kubectl apply -f -
apiVersion: kibana.k8s.elastic.co/v1
kind: Kibana
metadata:
  name: quickstart
spec:
  version: 8.15.0
  count: 1
  elasticsearchRef:
    name: quickstart
EOF

kubectl port-forward service/quickstart-kb-http 5601

# 复制修改自：https://github.com/fluent/fluentd-kubernetes-daemonset/blob/master/fluentd-daemonset-elasticsearch-rbac.yaml
curl -s -O https://raw.githubusercontent.com/panshiqu/server/main/k8s/fluentd-daemonset-elasticsearch-rbac.yaml
kubectl apply -f fluentd-daemonset-elasticsearch-rbac.yaml # 请修改密码 FLUENT_ELASTICSEARCH_PASSWORD

# Open https://localhost:5601

更新

游戏优雅停服细节说明

请先查看资源配置中对preStop的注释
首次收到SIGTERM信号，先标记停服后等待所有房间主动解散，没有房间则无需等待
此时服务发现不再分配本服务但允许定向连接，可以进入旧房间但不允许创建新房间
可对本服所有客户端定时持续广播房间将由系统解散，请主动解散后创建新房间（待实现）
再次收到SIGTERM信号，触发解散现有房间

# 可选借助此命令将本地打包的镜像载入minikube
# minikube image load panshiqu/game_server:1.3

# 可选在修改镜像前后通过调整partition来执行金丝雀发布，用以先更新并验证单个服务，值=replicas-1
# kubectl patch statefulsets dice -p '{"spec":{"updateStrategy":{"rollingUpdate":{"partition":1}}}}'

kubectl set image statefulsets dice game=panshiqu/game_server:1.3

kubectl rollout status statefulsets dice

# 验证测试不通过可以回滚
# kubectl rollout undo statefulsets dice

# kubectl patch statefulsets dice -p '{"spec":{"updateStrategy":{"rollingUpdate":{"partition":0}}}}'

网关得益于设计成重启几乎没有代价，客户端只会感到可能因为网络不好而触发了重连

kubectl set image deployments gate gate=panshiqu/gate_server:1.3

部署AB服，客户端老转新服将没有明确的时间限制

# 默认启用A服
kubectl apply -f https://raw.githubusercontent.com/panshiqu/server/main/k8s/dice-ab.yaml

kubectl set image statefulsets dice-b game=panshiqu/game_server:1.3

# 扩容开B服
kubectl scale statefulsets dice-b --replicas=2

# 启用B服
kubectl patch service dice -p '{"spec":{"selector":{"group":"b"}}}'

# 缩容停A服
kubectl scale statefulsets dice-a --replicas=0