k8s渐进

3. 中文版官方翻译【版本2】提供了很多interactive 体验环境。也可以自行安装 Minikube

Play with Kubernetes

# 1. Initializes cluster master node:
kubeadm init --apiserver-advertise-address $(hostname -i)
mkdir -p $HOME/.kube
sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
sudo chown $(id -u):$(id -g) $HOME/.kube/config
source <(kubectl completion bash)

# 2. Initialize cluster networking:
kubectl apply -n kube-system -f "https://cloud.weave.works/k8s/net?k8s-version=$(kubectl version | base64 |tr -d '\n')"
# You should now deploy a pod network to the cluster.
# Run "kubectl apply -f [podnetwork].yaml" with one of the options listed at:
#  http://kubernetes.io/docs/admin/addons/

# You can now join any number of machines by running the following on each node
# as root:
# 
#  kubeadm join --token c23f1c.f56bcf51048b7ebe 192.168.0.13:6443 --discovery-token-ca-cert-hash sha256:5aad0ba75d4c8d8e986f0d8b99a78fbcf8d107e8558baaf4097eadc7e98bc1aa

# 3. (Optional) Create an nginx deployment:
kubectl apply -f https://k8s.io/docs/user-guide//nginx-app.yaml

View Code

注意这个命令的的token，每次都是不一样的。每次都要从maste上拷贝一下，到每个node节点上。 # kubeadm join --token c23f1c.f56bcf51048b7ebe 192.168.0.13:6443 --discovery-token-ca-cert-hash sha256:5aad0ba75d4c8d8e986f0d8b99a78fbcf8d107e8558baaf4097eadc7e98bc1aa

Run 'kubectl get nodes' on the master to see this machine join.
alt+enter 全屏切换

b. Katacoda playground

使用手册

总共提供了14个例子

Katacoda

4. kubernetes 简介： kubelet 和 pod

5. federation

6. borg and k8s

7. vagrant 轻松搭建Kubernetes 1.2版运行环境

8. 轻松了解Kubernetes部署功能

9. KUBERNETES DEPLOYMENT 實現滾動升級

10. tasks

使用curl安装，已实验。 √

Configure Access to Multiple Clusters ×

Download as part of the Google Cloud SDK ×

# https://cloud.google.com/sdk/docs/quickstart-linux
sudo apt install python2.7

wget https://dl.google.com/dl/cloudsdk/channels/rapid/downloads/google-cloud-sdk-184.0.0-linux-x86_64.tar.gz

tar -zxvf  google-cloud-sdk*.tar.gz

./google-cloud-sdk/install.sh

gcloud init

Install with snap on Ubuntu ×

Picking the Right Solution. ×

how kubeconfig files are merged, see Organizing Cluster Access Using kubeconfig Files .√

各种命令详解，及其例子 kubectl config √

11. configmap 类似openstack的cloud init ？？

12. Pull an Image from a Private Registry 需要上传一个image

kubectl create secret docker-registry regsecret --docker-server=https://hub.docker.com/r/lvmxh/k8s-tasks --docker-username=lvmxh --docker-password=yourpassword --docker-email=lvmxh@126.com

13. 案例分析，这个比较复杂，还没有分析

https://kubernetes.io/docs/tasks/run-application/run-replicated-stateful-application/

14. K8s的标签能自动发现收集上报吗？

https://kubernetes.io/docs/tasks/manage-gpus/scheduling-gpus/

比如 kubelet或者其他的组件，去上报一些标签。

15. Emptydir实现原理是啥？

为啥生命周期是pod，而不是container？

有没有开发过自己的FlexVolume插件？

16. 服务发现与负载均衡

Ingress controller, Service Load Balancer 和 custom Load Balancer 没有用过

17. StorageClass

这个例子需要练习