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Gokit microservice demo

2020.11.03

小弟在 GDG Devfest 2019 分享過 Build go kit microservices at kubernetes with ease,Gokit 是一個建立 microservice 的 toolkit,Gokit 提出 Transport Endpoint Service 三種概念來幫助開始者進行架構分離,對單一微服務進行架構強制分離或許會增加程式碼的閱讀性,不過對一定規模的微服務來說,一致性的程式架構分離反而會增加多人開發的效率

cage1016/ms-demo

ServiceDescription
addExpose Sum method
tictacExpose Tic/Tac method

cage1016/ms-demo: gokit microservice demo 提供了使用 gokit 建立的 kubernetes/istio 的 manifest, 可以讓使用者快速的練習基於 kubernetes/istio 來搭建 gokit 微服務

Install

  1. Run skaffold run (first time will be slow)
  2. Set the ADD_HTTP_LB_URL/ADD_GRPC_LB_URL & TICTAC_HTTP_LB_URL/TICTAC_GRPC_LB_URL environment variable in your shell to the public IP/port of the Kubernetes loadBalancer
    export ADD_HTTP_LB_PORT=$(kubectl get service add-external -o jsonpath='{.spec.ports[?(@.name=="http")].port}')
    export ADD_GRPC_LB_PORT=$(kubectl get service add-external -o jsonpath='{.spec.ports[?(@.name=="grpc")].port}')
    export ADD_LB_HOST=$(kubectl get service add-external -o jsonpath='{.status.loadBalancer.ingress[0].hostname}')
    export ADD_HTTP_LB_URL=$ADD_LB_HOST:$ADD_HTTP_LB_PORT
    export ADD_GRPC_LB_URL=$ADD_LB_HOST:$ADD_GRPC_LB_PORT
    echo $ADD_HTTP_LB_URL
    echo $ADD_GRPC_LB_URL
    
    export TICTAC_HTTP_LB_PORT=$(kubectl get service tictac-external -o jsonpath='{.spec.ports[?(@.name=="http")].port}')
    export TICTAC_GRPC_LB_PORT=$(kubectl get service tictac-external -o jsonpath='{.spec.ports[?(@.name=="grpc")].port}')
    export TICTAC_LB_HOST=$(kubectl get service tictac-external -o jsonpath='{.status.loadBalancer.ingress[0].hostname}')
    export TICTAC_HTTP_LB_URL=$TICTAC_LB_HOST:$TICTAC_HTTP_LB_PORT
    export TICTAC_GRPC_LB_URL=$TICTAC_LB_HOST:$TICTAC_GRPC_LB_PORT
    echo $TICTAC_HTTP_LB_URL
    echo $TICTAC_GRPC_LB_URL
    
  3. Access by command
    • sum method
    curl -X POST $ADD_HTTP_LB_URL/sum -d '{"a": 1, "b":1}'
       
    or
       
    grpcurl -d '{"a": 1, "b":1}' -plaintext -proto ./pb/add/add.proto $ADD_GRPC_LB_URL pb.Add.Sum
    
    • tic method
    curl -X POST $TICTAC_HTTP_LB_URL/tic
       
    or
       
    grpcurl -plaintext -proto ./pb/tictac/tictac.proto $TICTAC_GRPC_LB_URL pb.Tictac.Tic
    
    • tac method
    curl $TICTAC_HTTP_LB_URL/tac
       
    or
       
    grpcurl -plaintext -proto ./pb/tictac/tictac.proto $TICTAC_GRPC_LB_URL pb.Tictac.Tac
    
  4. Apply istio manifests kubectl apply -f deployments/istio-manifests
  5. Set the GATEWAY_HTTP_URL/GATEWAY_GRPC_URL environment variable in your shell to the public IP/port of the Istio Ingress gateway.
    export INGRESS_HTTP_PORT=$(kubectl -n istio-system get service istio-ingressgateway -o jsonpath='{.spec.ports[?(@.name=="http2")].port}')
    export INGRESS_GRPC_PORT=$(kubectl -n istio-system get service istio-ingressgateway -o jsonpath='{.spec.ports[?(@.name=="https")].port}')
    export INGRESS_HOST=$(kubectl -n istio-system get service istio-ingressgateway -o jsonpath='{.status.loadBalancer.ingress[0].hostname}')
    export GATEWAY_HTTP_URL=$INGRESS_HOST:$INGRESS_HTTP_PORT
    export GATEWAY_GRPC_URL=$INGRESS_HOST:$INGRESS_GRPC_PORT
    echo $GATEWAY_HTTP_URL
    echo $GATEWAY_GRPC_URL
    
  6. Access by command
    • sum method
    curl -X POST $GATEWAY_HTTP_URL/api/v1/add/sum -d '{"a": 1, "b":1}'
       
    or
       
    grpcurl -d '{"a": 1, "b":1}' -plaintext -proto ./pb/add/add.proto $GATEWAY_GRPC_URL pb.Add.Sum
    
    • tic method
    curl -X POST $GATEWAY_HTTP_URL/api/v1/tictac/tic
       
    or
       
    grpcurl -plaintext -proto ./pb/tictac/tictac.proto $GATEWAY_GRPC_URL pb.Tictac.Tic
    
    • tac method
    curl $GATEWAY_HTTP_URL/api/v1/tictac/tac
       
    or
       
    grpcurl -plaintext -proto ./pb/tictac/tictac.proto $GATEWAY_GRPC_URL pb.Tictac.Tac
    

CleanUP

skaffold delete

or

kubectl delete -f deployments/istio-manifests

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