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# Kubernetes测试
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## 单元测试
单元测试仅依赖于源代码，是测试代码逻辑是否符合预期的最简单方法。
**运行所有的单元测试**
```
make test
```
**仅测试指定的package**
```sh
# 单个package
make test WHAT=./pkg/api
# 多个packages
make test WHAT=./pkg/{api,kubelet}
```
或者，也可以直接用`go test`
```sh
go test -v k8s.io/kubernetes/pkg/kubelet
```
**仅测试指定package的某个测试case**
```
# Runs TestValidatePod in pkg/api/validation with the verbose flag set
make test WHAT=./pkg/api/validation KUBE_GOFLAGS="-v" KUBE_TEST_ARGS='-run ^TestValidatePod$'
# Runs tests that match the regex ValidatePod|ValidateConfigMap in pkg/api/validation
make test WHAT=./pkg/api/validation KUBE_GOFLAGS="-v" KUBE_TEST_ARGS="-run ValidatePod\|ValidateConfigMap$"
```
或者直接用`go test`
```
go test -v k8s.io/kubernetes/pkg/api/validation -run ^TestValidatePod$
```
**并行测试**
并行测试是root out flakes的一种有效方法：
```sh
# Have 2 workers run all tests 5 times each (10 total iterations).
make test PARALLEL=2 ITERATION=5
```
**生成测试报告**
```
make test KUBE_COVER=y
```
## Benchmark测试
```
go test ./pkg/apiserver -benchmem -run=XXX -bench=BenchmarkWatch
```
## 集成测试
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Kubernetes集成测试需要安装etcd（ ， ） ，
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```
hack/install-etcd.sh # Installs in ./third_party/etcd
echo export PATH="\$PATH:$(pwd)/third_party/etcd" >> ~/.profile # Add to PATH
```
集成测试会在需要的时候自动启动etcd和kubernetes服务，
**运行所有集成测试**
```sh
make test-integration # Run all integration tests.
```
**指定集成测试用例**
```sh
# Run integration test TestPodUpdateActiveDeadlineSeconds with the verbose flag set.
make test-integration KUBE_GOFLAGS="-v" KUBE_TEST_ARGS="-run ^TestPodUpdateActiveDeadlineSeconds$"
```
## End to end (e2e)测试
End to end (e2e) 测试模拟用户行为操作Kubernetes，
在开启e2e测试之前， ， （ ） ：
```
make WHAT='test/e2e/e2e.test'
make ginkgo
export KUBERNETES_PROVIDER=local
```
**启动cluster， ，
```sh
# build Kubernetes, up a cluster, run tests, and tear everything down
go run hack/e2e.go -- -v --build --up --test --down
```
**仅测试指定的用例**
```sh
go run hack/e2e.go -v -test --test_args='--ginkgo.focus=Kubectl\sclient\s\[k8s\.io\]\sKubectl\srolling\-update\sshould\ssupport\srolling\-update\sto\ssame\simage\s\[Conformance\]$'
```
**略过测试用例**
```sh
go run hack/e2e.go -- -v --test --test_args="--ginkgo.skip=Pods.*env
```
**并行测试**
```sh
# Run tests in parallel, skip any that must be run serially
GINKGO_PARALLEL=y go run hack/e2e.go --v --test --test_args="--ginkgo.skip=\[Serial\]"
# Run tests in parallel, skip any that must be run serially and keep the test namespace if test failed
GINKGO_PARALLEL=y go run hack/e2e.go --v --test --test_args="--ginkgo.skip=\[Serial\] --delete-namespace-on-failure=false"
```
**清理测试**
```sh
go run hack/e2e.go -- -v --down
```
**有用的`-ctl`**
```sh
# -ctl can be used to quickly call kubectl against your e2e cluster. Useful for
# cleaning up after a failed test or viewing logs. Use -v to avoid suppressing
# kubectl output.
go run hack/e2e.go -- -v -ctl='get events'
go run hack/e2e.go -- -v -ctl='delete pod foobar'
```
## Fedaration e2e测试
```sh
export FEDERATION=true
export E2E_ZONES="us-central1-a us-central1-b us-central1-f"
# or export FEDERATION_PUSH_REPO_BASE="quay.io/colin_hom"
export FEDERATION_PUSH_REPO_BASE="gcr.io/${GCE_PROJECT_NAME}"
# build container images
KUBE_RELEASE_RUN_TESTS=n KUBE_FASTBUILD=true go run hack/e2e.go -- -v -build
# push the federation container images
build/push-federation-images.sh
# Deploy federation control plane
go run hack/e2e.go -- -v --up
# Finally, run the tests
go run hack/e2e.go -- -v --test --test_args="--ginkgo.focus=\[Feature:Federation\]"
# Don't forget to teardown everything down
go run hack/e2e.go -- -v --down
```
可以用`cluster/log-dump.sh < directory > `方便的下载相关日志，帮助排查测试中碰到的问题。
## Node e2e测试
Node e2e仅测试Kubelet的相关功能，
```sh
export KUBERNETES_PROVIDER=local
make test-e2e-node FOCUS="InitContainer"
make test_e2e_node TEST_ARGS="--experimental-cgroups-per-qos=true"
```
## 补充说明
借助kubectl的模版可以方便获取想要的数据，
```sh
kubectl get pods nginx-4263166205-ggst4 -o template '--template={{if (exists . "status" "containerStatuses")}}{{range .status.containerStatuses}}{{if eq .name "nginx"}}{{.image}}{{end}}{{end}}{{end}}'
```
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## kubernetes测试工具集test-infra
[test-infra ](https://github.com/kubernetes/test-infra )是由kubernetes官方开源的测试框架， ：
该测试框架主要是真多Google公有云做的， < https: / / github . com / kubernetes / test-infra > 。
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## 参考文档
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* https://github.com/kubernetes/test-infra
