mirror of https://github.com/k3s-io/k3s
95 lines
3.0 KiB
Markdown
95 lines
3.0 KiB
Markdown
## Getting started locally
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### Requirements
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#### Linux
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Not running Linux? Consider running Linux in a local virtual machine with [Vagrant](vagrant.md), or on a cloud provider like [Google Compute Engine](gce.md)
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#### Docker
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At least [Docker](https://docs.docker.com/installation/#installation) 1.0.0+. Ensure the Docker daemon is running and can be contacted (try `docker ps`). Some of the kubernetes components need to run as root, which normally works fine with docker.
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#### etcd
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You need an [etcd](https://github.com/coreos/etcd/releases/tag/v0.4.6) in your path, please make sure it is installed and in your ``$PATH``.
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#### go
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You need [go](https://golang.org/doc/install) in your path, please make sure it is installed and in your ``$PATH``.
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### Starting the cluster
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In a separate tab of your terminal, run:
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```
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cd kubernetes
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hack/local-up-cluster.sh
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```
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This will build and start a lightweight local cluster, consisting of a master
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and a single minion. Type Control-C to shut it down.
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You can use the cluster/kubecfg.sh script to interact with the local cluster.
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You must set the KUBERNETES_PROVIDER and KUBERNETES_MASTER environment variables to let other programs
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know how to reach your master.
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```
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export KUBERNETES_PROVIDER=local
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export KUBERNETES_MASTER=http://localhost:8080
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```
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### Running a container
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Your cluster is running, and you want to start running containers!
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You can now use any of the cluster/kubecfg.sh commands to interact with your local setup.
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```
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cluster/kubectl.sh get pods
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cluster/kubectl.sh get services
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cluster/kubectl.sh get replicationControllers
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cluster/kubecfg.sh -p 8081:80 run dockerfile/nginx 1 myNginx
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## begin wait for provision to complete, you can monitor the docker pull by opening a new terminal
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sudo docker images
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## you should see it pulling the dockerfile/nginx image, once the above command returns it
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sudo docker ps
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## you should see your container running!
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exit
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## end wait
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## introspect kubernetes!
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cluster/kubectl.sh get pods
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cluster/kubectl.sh get services
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cluster/kubectl.sh get replicationControllers
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```
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Congratulations!
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### Troubleshooting
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#### I can't reach service IPs on the network.
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Some firewall software that uses iptables may not interact well with
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kubernetes. If you're having trouble around networking, try disabling any
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firewall or other iptables-using systems, first.
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By default the IP range for service portals is 10.0.*.* - depending on your
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docker installation, this may conflict with IPs for containers. If you find
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containers running with IPs in this range, edit hack/local-cluster-up.sh and
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change the portal_net flag to something else.
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#### I cannot create a replication controller with replica size greater than 1! What gives?
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You are running a single minion setup. This has the limitation of only supporting a single replica of a given pod. If you are interested in running with larger replica sizes, we encourage you to try the local vagrant setup or one of the cloud providers.
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#### I changed Kubernetes code, how do I run it?
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```
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cd kubernetes
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hack/build-go.sh
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hack/local-up-cluster.sh
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```
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