在搭建开发环境之前， 请Try Kubernetes，Get Started and CONCEPTS

可以自己使用minikube 来搭建个环境， 自己玩一玩。

K8s需要一些依赖。 参看官方文档

https://github.com/kubernetes/community/blob/master/contributors/devel/running-locally.md

1. 需要安装 linux

2. 安装docker

wget -O- https://get.docker.com/ |bash
sudo usermod -aG docker $USER

3. 安装etcd

hack/install-etcd.sh  # Installs in ./third_party/etcd
echo "export PATH=\"\$PATH:$(pwd)/third_party/etcd\"" >> ~/.profile  # Add to PATH

4. 安装go

sudo add-apt-repository ppa:gophers/archive

sudo apt update

sudo apt-get install golang-1.9-go

cat >> ~/.profile <<<'

GOROOT=`go env |grep "GOROOT" |cut -d "=" -f2`

GOROOT=${GOROOT#\"}

GOROOT=${GOROOT%\"}

GOPATH=`go env |grep GOPATH |cut -d "=" -f 2`

GOPATH=${GOPATH%\"}

GOPATH=${GOPATH#\"}'

echo "export PATH=\$PATH:/usr/lib/go-1.9/bin" >> ~/.profile

source ~/.profile

5. 安装 openssl

6. 安装 CFSSL

go get -u github.com/cloudflare/cfssl/cmd/...
echo "export PATH=\$PATH:\$GOPATH/bin" >> ~/.profile
source ~/.profile

7. 下载源码

git clone --depth=1 https://github.com/kubernetes/kubernetes.git

8. 编译安装k8s

cd kubernetes

hack/local-up-cluster.sh

9. 可以开发了。

请参看 devel  重点 coding-conventions

go调试， 请参考 golang debug， 推荐使用Delve

=============================

参考文档：

https://kubernetes.io/

开发者主要看看： Community 和 Documentation

附录:

编译过程:

$ hack/local-up-cluster.sh

WARNING : The kubelet is configured to not fail if swap is enabled; production deployments should disable swap.

WARNING : This script MAY be run as root for docker socket / iptables functionality; if failures occur, retry as root.

make: Entering directory '/home/ubuntu/kubernetes'

make[]: Entering directory '/home/ubuntu/kubernetes'

+++ [ ::] Building the toolchain targets:

    k8s.io/kubernetes/hack/cmd/teststale

    k8s.io/kubernetes/vendor/github.com/jteeuwen/go-bindata/go-bindata

+++ [ ::] Generating bindata:

    test/e2e/generated/gobindata_util.go

~/kubernetes ~/kubernetes/test/e2e/generated

~/kubernetes/test/e2e/generated

+++ [ ::] Building go targets for linux/amd64:

    ./vendor/k8s.io/code-generator/cmd/deepcopy-gen

+++ [ ::] Building the toolchain targets:

    k8s.io/kubernetes/hack/cmd/teststale

    k8s.io/kubernetes/vendor/github.com/jteeuwen/go-bindata/go-bindata

+++ [ ::] Generating bindata:

    test/e2e/generated/gobindata_util.go

~/kubernetes ~/kubernetes/test/e2e/generated

~/kubernetes/test/e2e/generated

+++ [ ::] Building go targets for linux/amd64:

    ./vendor/k8s.io/code-generator/cmd/defaulter-gen

+++ [ ::] Building the toolchain targets:

    k8s.io/kubernetes/hack/cmd/teststale

    k8s.io/kubernetes/vendor/github.com/jteeuwen/go-bindata/go-bindata

+++ [ ::] Generating bindata:

    test/e2e/generated/gobindata_util.go

~/kubernetes ~/kubernetes/test/e2e/generated

~/kubernetes/test/e2e/generated

+++ [ ::] Building go targets for linux/amd64:

    ./vendor/k8s.io/code-generator/cmd/conversion-gen

+++ [ ::] Building the toolchain targets:

    k8s.io/kubernetes/hack/cmd/teststale

    k8s.io/kubernetes/vendor/github.com/jteeuwen/go-bindata/go-bindata

+++ [ ::] Generating bindata:

    test/e2e/generated/gobindata_util.go

~/kubernetes ~/kubernetes/test/e2e/generated

~/kubernetes/test/e2e/generated

+++ [ ::] Building go targets for linux/amd64:

    ./vendor/k8s.io/code-generator/cmd/openapi-gen

make[]: Leaving directory '/home/ubuntu/kubernetes'

+++ [ ::] Building the toolchain targets:

    k8s.io/kubernetes/hack/cmd/teststale

    k8s.io/kubernetes/vendor/github.com/jteeuwen/go-bindata/go-bindata

+++ [ ::] Generating bindata:

    test/e2e/generated/gobindata_util.go

~/kubernetes ~/kubernetes/test/e2e/generated

~/kubernetes/test/e2e/generated

+++ [ ::] Building go targets for linux/amd64:

    cmd/kubectl

    cmd/hyperkube

+++ [ ::] +++ Warning: stdlib pkg with cgo flag not found.

+++ [ ::] +++ Warning: stdlib pkg cannot be rebuilt since /usr/lib/go-1.9/pkg is not writable by ubuntu

+++ [ ::] +++ Warning: Make /usr/lib/go-1.9/pkg writable for ubuntu for a one-time stdlib install, Or

+++ [ ::] +++ Warning: Rebuild stdlib using the command 'CGO_ENABLED=0 go install -a -installsuffix cgo std'

+++ [ ::] +++ Falling back to go build, which is slower

    **

make: Leaving directory '/home/ubuntu/kubernetes'

WARNING: No swap limit support

Kubelet cgroup driver defaulted to use: cgroupfs

API SERVER insecure port is free, proceeding...

API SERVER secure port is free, proceeding...

Detected host and ready to start services.  Doing some housekeeping first...

Using GO_OUT /home/ubuntu/kubernetes/_output/local/bin/linux/amd64

Starting services now!

Starting etcd

etcd --advertise-client-urls http://127.0.0.1:2379 --data-dir /tmp/tmp.lG7Vdi3iOj --listen-client-urls http://127.0.0.1:2379 --debug > "/dev/null" 2>/dev/null

Waiting for etcd to come up.

+++ [ ::] On try , etcd: : http://127.0.0.1:2379

{"action":"set","node":{"key":"/_test","value":"","modifiedIndex":,"createdIndex":}}

Generating a  bit RSA private key

...............+++

.....................................................................................................................+++

writing new private key to '/var/run/kubernetes/server-ca.key'

-----

Generating a  bit RSA private key

..................+++

................................................+++

writing new private key to '/var/run/kubernetes/client-ca.key'

-----

Generating a  bit RSA private key

....................................................................+++

.....................................+++

writing new private key to '/var/run/kubernetes/request-header-ca.key'

-----

// :: [INFO] generate received request

// :: [INFO] received CSR

// :: [INFO] generating key: rsa-

// :: [INFO] encoded CSR

// :: [INFO] signed certificate with serial number

// :: [INFO] generate received request

// :: [INFO] received CSR

// :: [INFO] generating key: rsa-

// :: [INFO] encoded CSR

// :: [INFO] signed certificate with serial number

// :: [INFO] generate received request

// :: [INFO] received CSR

// :: [INFO] generating key: rsa-

// :: [INFO] encoded CSR

// :: [INFO] signed certificate with serial number

// :: [INFO] generate received request

// :: [INFO] received CSR

// :: [INFO] generating key: rsa-

// :: [INFO] encoded CSR

// :: [INFO] signed certificate with serial number

// :: [INFO] generate received request

// :: [INFO] received CSR

// :: [INFO] generating key: rsa-

// :: [INFO] encoded CSR

// :: [INFO] signed certificate with serial number

// :: [INFO] generate received request

// :: [INFO] received CSR

// :: [INFO] generating key: rsa-

// :: [INFO] encoded CSR

// :: [INFO] signed certificate with serial number

// :: [INFO] generate received request

// :: [INFO] received CSR

// :: [INFO] generating key: rsa-

// :: [INFO] encoded CSR

// :: [INFO] signed certificate with serial number

// :: [INFO] generate received request

// :: [INFO] received CSR

// :: [INFO] generating key: rsa-

// :: [INFO] encoded CSR

// :: [INFO] signed certificate with serial number

// :: [INFO] generate received request

// :: [INFO] received CSR

// :: [INFO] generating key: rsa-

// :: [INFO] encoded CSR

// :: [INFO] signed certificate with serial number

Waiting for apiserver to come up

+++ [ ::] On try , apiserver: : ok

Cluster "local-up-cluster" set.

use 'kubectl --kubeconfig=/var/run/kubernetes/admin-kube-aggregator.kubeconfig' to use the aggregated API server

service "kube-dns" created

serviceaccount "kube-dns" created

configmap "kube-dns" created

deployment "kube-dns" created

Kube-dns addon successfully deployed.

kubelet (  ) is running.

Create default storage class for

storageclass "standard" created

Local Kubernetes cluster is running. Press Ctrl-C to shut it down.

Logs:

  /tmp/kube-apiserver.log

  /tmp/kube-controller-manager.log

  /tmp/kube-proxy.log

  /tmp/kube-scheduler.log

  /tmp/kubelet.log

To start using your cluster, you can open up another terminal/tab and run:

  export KUBECONFIG=/var/run/kubernetes/admin.kubeconfig

  cluster/kubectl.sh

Alternatively, you can write to the default kubeconfig:

  export KUBERNETES_PROVIDER=local

  cluster/kubectl.sh config set-cluster local --server=https://localhost:6443 --certificate-authority=/var/run/kubernetes/server-ca.crt

  cluster/kubectl.sh config set-credentials myself --client-key=/var/run/kubernetes/client-admin.key --client-certificate=/var/run/kubernetes/client-admin.crt

  cluster/kubectl.sh config set-context local --cluster=local --user=myself

  cluster/kubectl.sh config use-context local

  cluster/kubectl.sh

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