Update README quick start
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RainbowMango
Hongcai Ren
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README.md
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README.md
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@ -51,79 +51,131 @@ The following diagram shows how Karmada resources are involved when propagating
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## Quickstart
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## Quick Start
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Please install [kind](https://kind.sigs.k8s.io/) and [kubectl](https://kubernetes.io/docs/tasks/tools/install-kubectl/) before the following steps.
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This guide will cover:
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- Install `karmada` control plane components in a Kubernetes cluster which as known as `host cluster`.
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- Join a member cluster to `karmada` control plane.
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- Propagate an application by `karmada`.
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### Install karmada
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### Prerequisites
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- Go version v1.14+
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- [kubectl](https://kubernetes.io/docs/tasks/tools/install-kubectl/) version v1.19+
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- [kind](https://kind.sigs.k8s.io/) version v0.9.0+
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1. Clone this repo to get karmada.
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### Install karmada control plane
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#### 1. Clone this repo to your machine:
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```
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git clone https://github.com/karmada-io/karmada
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# git clone https://github.com/karmada-io/karmada
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```
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2. Move to the karmada package directory.
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#### 2. Change to karmada directory:
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```
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cd karmada
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# cd karmada
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```
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3. Install karmada.
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#### 3. Deploy and run karmada control plane:
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```
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export KUBECONFIG=/root/.kube/karmada.config
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hack/local-up-karmada.sh
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# hack/local-up-karmada.sh
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```
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The script `hack/local-up-karmada.sh` will do following tasks for you:
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- Start a Kubernetes cluster which as known as the `host cluster`.
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- Build karmada control plane components based on current codebase.
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- Deploy karmada control plane components on `host cluster`.
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If everything goes well, at the end of the script output, you will see similar messages as follows:
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```
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Local Karmada is running.
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To start using your karmada, run:
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export KUBECONFIG=/var/run/karmada/karmada-apiserver.config
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To start checking karmada components running status on the host cluster, please run:
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export KUBECONFIG="/root/.kube/karmada-host.config"
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```
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4. Verify that karmada's component is deployed and running.
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It should be noticed that, you will get two `KUBECONFIG` file after the script run:
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- karmada-apiserver.config
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- karmada-host.config
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The script `hack/local-up-karmada.sh` is expected to deploy an extra `kube-apiserver`, it's called `karmada apiserver`, on the `host cluster`.
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So, the `karmada-apiserver.config` is the config for `karmada apiserver`, and `karmada-host.config` is the config for
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`host cluster`.
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Furthermore, the `host cluster` only used to deploy karmada control plane components.
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#### 4. Verify the karmada components:
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Now, we are going to checking karmada control plane components running status on `host cluster`, make sure set the
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`KUBECONFIG` environment variable with `host cluster` config file:
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```
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kubectl get pods -n karmada-system
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# export KUBECONFIG="/root/.kube/karmada-host.config"
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```
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The karmada control plane components are expecting to be installed in `karmada-system` namespaces:
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```
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# kubectl get deployments.apps -n karmada-system
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NAME READY UP-TO-DATE AVAILABLE AGE
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karmada-apiserver 1/1 1 1 16m
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karmada-controller-manager 1/1 1 1 14m
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karmada-kube-controller-manager 1/1 1 1 16m
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```
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(Note: `karmada-scheduler` is still under development.)
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### Join member cluster
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In the following steps, we are going to create a member cluster and then join the cluster to
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karmada control plane.
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1. Create **member cluster** for attaching it to karmada.
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#### 1. Create member cluster
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We are going to create a cluster named `member-cluster-1` and we want the `KUBECONFIG` file
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in `/root/.kube/membercluster1.config`. Run following comand:
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```
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hack/create-cluster.sh member-cluster-1 /root/.kube/membercluster1.config
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# hack/create-cluster.sh member-cluster-1 /root/.kube/membercluster1.config
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```
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The script `hack/create-cluster.sh` will create a standalone cluster.
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#### 2. Join member cluster to karmada control plane
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The command `karmadactl` will help to join the member cluster to karmada control plane,
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before that, we should set `KUBECONFIG` to karmada apiserver:
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```
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# export KUBECONFIG=/var/run/karmada/karmada-apiserver.config
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```
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2. Join member cluster to karmada using karmadactl.
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Then, install `karmadactl` command and join the member cluster:
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```
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make karmadactl
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export KUBECONFIG=/var/run/karmada/karmada-apiserver.config
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./karmadactl join member-cluster-1 --member-cluster-kubeconfig=/root/.kube/membercluster1.config
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# go get github.com/karmada-io/karmada/cmd/karmadactl
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# karmadactl join member-cluster-1 --member-cluster-kubeconfig=/root/.kube/membercluster1.config
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```
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The `karmadactl join` command will create a `MemberCluster` object to reflect the member cluster.
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3. Verify member cluster is Joined to karmada successfully.
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### 3. Check member cluster status
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Now, check the member clusters from karmada control plane by following command:
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```
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export KUBECONFIG=/var/run/karmada/karmada-apiserver.config
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kubectl get membercluster -n karmada-cluster
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# kubectl get membercluster
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NAME KUBERNETESVERSION READY AGE
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member-cluster-1 v1.19.1 True 75s
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```
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### Propagate application
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In the following steps, we are going to propagate a deployment by karmada.
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1. Create nginx deployment in karmada.
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#### 1. Create nginx deployment in karmada.
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First, create a [deployment](samples/nginx/deployment.yaml) named `nginx`:
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```
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export KUBECONFIG=/var/run/karmada/karmada-apiserver.config
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kubectl create -f samples/nginx/deployment.yaml
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# kubectl create -f samples/nginx/deployment.yaml
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```
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2. Create PropagationPolicy that will propagate nginx to member cluster.
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#### 2. Create PropagationPolicy that will propagate nginx to member cluster
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Then, we need create a policy to drive the deployment to our member cluster.
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```
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export KUBECONFIG=/var/run/karmada/karmada-apiserver.config
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kubectl create -f samples/nginx/propagationpolicy.yaml
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# kubectl create -f samples/nginx/propagationpolicy.yaml
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```
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3. Verify the nginx is deployed successfully in **member-cluster-1**.
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#### 3. Verify the nginx is deployed successfully in member cluster
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Start another window, set `KUBECONFIG` with the file we specified in `hack/create-cluster.sh` command,
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and then check if the deployment exist:
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```
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export KUBECONFIG=/root/.kube/membercluster1.config
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kubectl describe deploy nginx
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# export KUBECONFIG=/root/.kube/membercluster1.config
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# kubectl get deployment
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NAME READY UP-TO-DATE AVAILABLE AGE
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nginx 1/1 1 1 43s
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```
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