使用 kubebuilder 自定义 CRD 资源和 Controller

安装 kustomize

kustomize 在 1.14+ 的 kubectl 中被集成，但是 kubebuilder 生成的项目 Makefile 用的还是 kustomize 命令

下载二进制文件安装

https://github.com/kubernetes-sigs/kustomize/releases/tag/kustomize%2Fv3.3.0

mac 可以直接

brew install kustomize

二进制安装 kubebuilder

os=$(go env GOOS)
arch=$(go env GOARCH)

# download kubebuilder and extract it to tmp
curl -sL https://go.kubebuilder.io/dl/2.0.1/${os}/${arch} | tar -xz -C /tmp/

# move to a long-term location and put it on your path
# (you'll need to set the KUBEBUILDER_ASSETS env var if you put it somewhere else)
sudo mv /tmp/kubebuilder_2.0.1_${os}_${arch} /usr/local/kubebuilder
export PATH=$PATH:/usr/local/kubebuilder/bin

创建项目

mkdir $GOPATH/src/example
cd $GOPATH/src/example
kubebuilder init --domain my.com

创建 api

kubebuilder create api --group webapp --version v1 --kind Guestbook

安装 CRDs 到集群

make install

本地前台运行 controller

make run

部署自定义资源的实例

kubectl apply -f config/samples/

修改 Dockefile

cp -a ~/.kube kube

vi Dockerfile

FROM golang:1.12.5 as builder
WORKDIR /example
COPY go.mod go.mod
COPY go.sum go.sum
RUN rm -rf $GOPATH/go.mod && export GOPROXY=https://goproxy.cn &&  go mod download
COPY main.go main.go
COPY api/ api/
COPY controllers/ controllers/
RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 GO111MODULE=on go build -a -o manager main.go
FROM gcr.azk8s.cn/distroless/static:nonroot
WORKDIR /
COPY kube /root/.kube
COPY --from=builder /example/manager .
#USER nonroot:nonroot
ENTRYPOINT ["/manager"]

构建/推送镜像

make docker-build docker-push IMG=<some-registry>/<project-name>:tag

部署到集群

make deploy IMG=<some-registry>/<project-name>:tag