A kind workflow
for contributing to
Kubernetes!
slide: kind.k8s.work
curl -L kind.k8s.work/fetch | bash
Go Get The BITS!!
This will download everything needed for the workshop!
curl -L kind.k8s.work/fetch | bash
# Windows: curl.exe -L kind.k8s.work/fetch | cmd
docker run --rm -i -v /tmp:/tmp --network=host quay.io/kind-workshop/kind-fetch
Note: Using Windows? Be sure to use
curl.exeand pipe tocmd
Who are we?
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 4 different companys, one team. |
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curl -L kind.k8s.work/fetch | bash
Welcome Everyone!
Let's get to know one another!
A few questions:
- Did you bring a laptop?
- Do you have docker installed?
- Have you contributed to Kubernetes before?
curl -L kind.k8s.work/fetch | bash
Agenda:
- Get Docker installed!
- Get "the bits!"
- Overview of the Kind Project
- Overview of contributing to Kubernetes
- Sample Commit
- Let's build from before the sample commit
- Let's build our cloned version of the patch
- Let's verify things work as work as expected!
- Profit!
Let's get docker installed.
- For the MAC: https://docs.docker.com/docker-for-mac/install/
- For Windows: https://docs.docker.com/docker-for-windows/install/
- For linux:
Check Docker Desktop settings
https://kind.sigs.k8s.io/docs/user/quick-start/#settings-for-docker-desktop
Start your wifi. Make some waves!
If you have already pulled quay.io/kind-workshop/kind-cache you don't need to do this! also THANKS!
curl -L kind.k8s.work/fetch | bash
# Windows: curl.exe -L kind.k8s.work/fetch | cmd
This will download a flattened image that has all the bits needed for the workshop.
It will do this using aria2 and will multiget it from 10 servers in us-west-1
Wait, what are we downloading?
These are all things you'll need to build & deploy with Kind in this workshop
What Size
--------------------------------------
kind-buildenv:1.13 1.37GB
kindest/base:latest 329MB
etcd:3.3.10 258MB
kube-cross:v1.12.7-1 1.75GB
coredns:1.3.1 40.3MB
kindnetd:0.5.0 81.8MB
debian-iptables-amd64:v11.0.2 45.4MB
debian-base-amd64:v1.0.0 42.3MB
pause:3.1 742kB
This is NOT real life :)
In real life you would have all of kubernetes checked out and would likely be running kind from you laptop via
brew install kind
choco install kind
This lab is canned!
Once all of the resources are downloaded we can do this entire lab offline.
go get kubernetes
go get -d k8s.io/kubernetes This will take a minute
Why not github.com/kubernetes/kubernetes?
What is kind?
Contributors get free cache!
For this session, we've asked everyone to download an image ahead of time. This isn't what you'd do at home, but it keeps us from waiting on wifi today :)
Let's start up the cache, and get it's IP:
$ curl -L kind.k8s.work/cache
docker run --rm --name kind-cache -v /var/run/docker.sock:/var/run/docker.sock quay.io/kind-workshop/kind-cache
Note: Using PowerShell? Be sure to use
curl.exe
Start up a build environment
This has golang, git, bazel and all the other tools you need ready to go.
$ curl -L kind.k8s.work/buildenv
docker run --rm -d --name buildenv --hostname buildenv -v /var/run/docker.sock:/var/run/docker.sock -v /tmp:/tmp quay.io/kind-workshop/kind-buildenv:1.13
Once that's started, shell into it
docker exec -it buildenv bash
Let's see what we're testing
root@buildenv:/go/src/k8s.io/kubernetes# git log
commit 97c4edaa4f28f914db45766330b6db8953720588 (HEAD -> fix)
Author: louisssgong <louisssgong@tencent.com>
Date: Sat Aug 3 17:44:12 2019 +0800
Fix a bug in the IPVS proxier where virtual servers are not cleaned up even though the corresponding Service object was deleted.
Build before the change
kind build node-image --image=local:master
Build a cluster
cd /go
kind create cluster --config kind-config.yaml --image=local:master
kind get kubeconfig --internal > ~/.kube/config
kubectl get pods -Aw
Testing it out
kubectl create deploy test --image=k8s.gcr.io/pause:3.1
kubectl expose deploy test --port 80
docker exec -ti kind-control-plane ip addr show dev kube-ipvs0
kubectl get svc -o wide
kubectl delete svc test
docker exec -ti kind-control-plane ip addr show dev kube-ipvs0
Hmm, the interface should have been removed, but it wasn't
Cleaning up before testing the fix
kind delete cluster
Build after the change
kind build node-image --image=local:fix
Build a cluster with the fix
cd /go
kind create cluster --config kind-config.yaml --image=local:fix
kind get kubeconfig --internal > ~/.kube/config
kubectl get pods -Aw
kubectl delete svc test
docker exec -ti kind-control-plane ip addr show dev kube-ipvs0
Testing the fix
kubectl create deploy test --image=k8s.gcr.io/pause:3.1
kubectl expose deploy test --port 80
docker exec -ti kind-control-plane ip addr show dev kube-ipvs0
kubectl get svc -o wide
Cleaning up!
docker stop buildenv
docker system prune --volumes
docker system prune