rke安裝k8s

Installation

RKE is a fast, versatile Kubernetes installer that you can use to install Kubernetes on your Linux hosts. You can get started in a couple of quick and easy steps:

1. Download the RKE Binary
2. Prepare the Nodes for the Kubernetes Cluster
3. Creating the Cluster Configuration File
4. Deploying Kubernetes with RKE
5. Interacting with your Kubernetes Cluster

Download the RKE binary

1. From your workstation, open a web browser and navigate to our RKE Releases page. Download the latest RKE installer applicable to your Operating System:
   • MacOS:

     rke_darwin-amd64

   • Linux:

     rke_linux-amd64

   • Windows:

     rke_windows-amd64.exe

2. Make the RKE binary that you just downloaded executable. Open Terminal, change directory to the location of the RKE binary, and then run one of the commands below.

   Using Windows?

   The file is already an executable. Skip to Prepare the Nodes for the Kubernetes Cluster.

   # MacOS
   $ chmod +x rke_darwin-amd64
   # Linux
   $ chmod +x rke_linux-amd64           

3. Confirm that RKE is now executable by running the following command:

   # MacOS
   $ ./rke_darwin-amd64 --version
   # Linux
   $ ./rke_linux-amd64 --version           

Prepare the Nodes for the Kubernetes cluster

The Kubernetes cluster components are launched using Docker on a Linux distro. You can use any Linux you want, as long as you can install Docker on it.

Review the [OS requirements]({{< baseurl >}}/rke/v0.1.x/en/installation/os/) and configure each node appropriately.

RKE uses a cluster configuration file, referred to as

cluster.yml

to determine what nodes will be in the cluster and how to deploy Kubernetes. There are [many configuration options]({{< baseurl >}}/rke/v0.1.x/en/config-options/) that can be set in the

cluster.yml

. In our example, we will be assuming the minimum of one [node]({{< baseurl >}}/rke/v0.1.x/en/config-options/nodes) for your Kubernetes cluster.

There are two easy ways to create a

cluster.yml

:

• Using our [minimal

  cluster.yml

  ]({{< baseurl >}}/rke/v0.1.x/en/example-yamls/#minimal-cluster-yml-example) and updating it based on the node that you will be using.
• Using

  rke config

  to query for all the information needed.

rke config

To create a new

cluster.yml

, run

rke config

and this command prompts you for all the information needed to build your cluster. Review [our cluster configuration options]({{< baseurl >}}/rke/v0.1.x/en/config-options/) to understand what each question means.

./rke_darwin-amd64 config           

After answering the list of questions, there is a

cluster.yml

created in the directory where you launched the

rke config

command. After the

cluster.yml

is created, you can edit the file to make any changes.

Creating a Basic

cluster.yml

$ rke config --name cluster.yml           

cluster.yml

rke config

command.

Creating an Empty

cluster.yml

If you want an empty

cluster.yml

template, you can use the

--empty

flag so that a template is produced, but there are no values in the template.

$ rke config --empty --name cluster.yml           

Printing the

cluster.yml

Instead of creating a file, you can print the generated configuration to stdout using the

--print

flag.

$ rke config --print           

High Availability

RKE is HA ready, you can specify more than one

controlplane

node in the

cluster.yml

file. RKE will deploy master components on all of these nodes and the kubelets are configured to connect to

127.0.0.1:6443

by default which is the address of

nginx-proxy

service that proxy requests to all master nodes.

To create an HA cluster, specify more than one host with role

controlplane

.

After you've created your

cluster.yml

, you can deploy your cluster with a simple command. This command assumes the

cluster.yml

file is in the same directory as where you are running the command.

# MacOS
$ ./rke_darwin-amd64 up
# Linux
$ ./rke_linux-amd64 up           

There will be log statements as the Kubernetes cluster is created.

$ ./rke_darwin-amd64 up
INFO[0000] Building Kubernetes cluster
INFO[0000] [dialer] Setup tunnel for host [10.0.0.1]
INFO[0000] [network] Deploying port listener containers
INFO[0000] [network] Pulling image [alpine:latest] on host [10.0.0.1]
...
INFO[0101] Finished building Kubernetes cluster successfully           

Interacting with your Kubernetes cluster

# Confirm that kubectl is working by checking the version of your Kubernetes cluster
$ kubectl --kubeconfig kube_config_cluster.yml version
Client Version: version.Info{Major:"1", Minor:"10", GitVersion:"v1.10.0", GitCommit:"fc32d2f3698e36b93322a3465f63a14e9f0eaead", GitTreeState:"clean", BuildDate:"2018-03-27T00:13:02Z", GoVersion:"go1.9.4", Compiler:"gc", Platform:"darwin/amd64"}
Server Version: version.Info{Major:"1", Minor:"8+", GitVersion:"v1.8.9-rancher1", GitCommit:"68595e18f25e24125244e9966b1e5468a98c1cd4", GitTreeState:"clean", BuildDate:"2018-03-13T04:37:53Z", GoVersion:"go1.8.3", Compiler:"gc", Platform:"linux/amd64"}           

$ kubectl --kubeconfig kube_config_cluster.yml get nodes
NAME            STATUS    ROLES                      AGE       VERSION
10.0.0.1         Ready     controlplane,etcd,worker   35m       v1.10.3-rancher1