--- assignees: - brendandburns - jbeda - mikedanese - thockin --- The example below creates a Kubernetes cluster with 4 worker node Virtual Machines and a master Virtual Machine (i.e. 5 VMs in your cluster). This cluster is set up and controlled from your workstation (or wherever you find convenient). * TOC {:toc} ### Before you start If you want a simplified getting started experience and GUI for managing clusters, please consider trying [Google Container Engine](https://cloud.google.com/container-engine/) (GKE) for hosted cluster installation and management. If you want to use custom binaries or pure open source Kubernetes, please continue with the instructions below. ### Prerequisites 1. You need a Google Cloud Platform account with billing enabled. Visit the [Google Developers Console](http://cloud.google.com/console) for more details. 1. Install `gcloud` as necessary. `gcloud` can be installed as a part of the [Google Cloud SDK](https://cloud.google.com/sdk/). 1. Enable the [Compute Engine Instance Group Manager API](https://developers.google.com/console/help/new/#activatingapis) in the [Google Cloud developers console](https://console.developers.google.com). 1. Make sure that gcloud is set to use the Google Cloud Platform project you want. You can check the current project using `gcloud config list project` and change it via `gcloud config set project `. 1. Make sure you have credentials for GCloud by running ` gcloud auth login`. 1. Make sure you can start up a GCE VM from the command line. At least make sure you can do the [Create an instance](https://cloud.google.com/compute/docs/instances/#startinstancegcloud) part of the GCE Quickstart. 1. Make sure you can ssh into the VM without interactive prompts. See the [Log in to the instance](https://cloud.google.com/compute/docs/instances/#sshing) part of the GCE Quickstart. ### Starting a cluster You can install a client and start a cluster with either one of these commands (we list both in case only one is installed on your machine): ```shell curl -sS https://get.k8s.io | bash ``` or ```shell wget -q -O - https://get.k8s.io | bash ``` Once this command completes, you will have a master VM and four worker VMs, running as a Kubernetes cluster. By default, some containers will already be running on your cluster. Containers like `fluentd` provide [logging](/docs/getting-started-guides/logging), while `heapster` provides [monitoring](http://releases.k8s.io/{{page.githubbranch}}/cluster/addons/cluster-monitoring/README.md) services. The script run by the commands above creates a cluster with the name/prefix "kubernetes". It defines one specific cluster config, so you can't run it more than once. Alternately, you can download and install the latest Kubernetes release from [this page](https://github.com/kubernetes/kubernetes/releases), then run the `/cluster/kube-up.sh` script to start the cluster: ```shell cd kubernetes cluster/kube-up.sh ``` If you want more than one cluster running in your project, want to use a different name, or want a different number of worker nodes, see the `/cluster/gce/config-default.sh` file for more fine-grained configuration before you start up your cluster. If you run into trouble, please see the section on [troubleshooting](/docs/getting-started-guides/gce/#troubleshooting), post to the [kubernetes-users group](https://groups.google.com/forum/#!forum/kubernetes-users), or come ask questions on [Slack](/docs/troubleshooting/#slack). The next few steps will show you: 1. How to set up the command line client on your workstation to manage the cluster 1. Examples of how to use the cluster 1. How to delete the cluster 1. How to start clusters with non-default options (like larger clusters) ### Installing the Kubernetes command line tools on your workstation The cluster startup script will leave you with a running cluster and a `kubernetes` directory on your workstation. The next step is to make sure the `kubectl` tool is in your path. The [kubectl](/docs/user-guide/kubectl/kubectl) tool controls the Kubernetes cluster manager. It lets you inspect your cluster resources, create, delete, and update components, and much more. You will use it to look at your new cluster and bring up example apps. Add the appropriate binary folder to your `PATH` to access kubectl: ```shell # OS X export PATH=/platforms/darwin/amd64:$PATH # Linux export PATH=/platforms/linux/amd64:$PATH ``` **Note**: gcloud also ships with `kubectl`, which by default is added to your path. However the gcloud bundled kubectl version may be older than the one downloaded by the get.k8s.io install script. We recommend you use the downloaded binary to avoid potential issues with client/server version skew. #### Enabling bash completion of the Kubernetes command line tools You may find it useful to enable `kubectl` bash completion: * If you're using kubectl with Kubernetes version 1.2 or earlier, you can source the kubectl completion script as follows:
``` $ source ./contrib/completions/bash/kubectl ``` * If you're using kubectl with Kubernetes version 1.3, use the `kubectl completion` command as follows:
``` $ source <(kubectl completion bash) ``` **Note**: The above commands will last for the duration of your bash session. If you want to make this permanent you need to add corresponding command in your bash profile. Alternatively, on most linux distributions you can also add a completions file to your bash_completions.d as follows: * For kubectl with Kubernetes v1.2 or earlier:
``` $ cp ./contrib/completions/bash/kubectl /etc/bash_completion.d/ ``` * For kubectl with Kubernetes v1.3:
``` $ kubectl completion bash | sudo tee /etc/bash_completion.d/kubectl ``` but then you have to update it when you update kubectl. ### Getting started with your cluster #### Inspect your cluster Once `kubectl` is in your path, you can use it to look at your cluster. E.g., running: ```shell $ kubectl get --all-namespaces services ``` should show a set of [services](/docs/user-guide/services) that look something like this: ```shell NAMESPACE NAME CLUSTER_IP EXTERNAL_IP PORT(S) SELECTOR AGE default kubernetes 10.0.0.1 443/TCP 1d kube-system kube-dns 10.0.0.2 53/TCP,53/UDP k8s-app=kube-dns 1d kube-system kube-ui 10.0.0.3 80/TCP k8s-app=kube-ui 1d ... ``` Similarly, you can take a look at the set of [pods](/docs/user-guide/pods) that were created during cluster startup. You can do this via the ```shell $ kubectl get --all-namespaces pods ``` command. You'll see a list of pods that looks something like this (the name specifics will be different): ```shell NAMESPACE NAME READY STATUS RESTARTS AGE kube-system fluentd-cloud-logging-kubernetes-minion-63uo 1/1 Running 0 14m kube-system fluentd-cloud-logging-kubernetes-minion-c1n9 1/1 Running 0 14m kube-system fluentd-cloud-logging-kubernetes-minion-c4og 1/1 Running 0 14m kube-system fluentd-cloud-logging-kubernetes-minion-ngua 1/1 Running 0 14m kube-system kube-dns-v5-7ztia 3/3 Running 0 15m kube-system kube-ui-v1-curt1 1/1 Running 0 15m kube-system monitoring-heapster-v5-ex4u3 1/1 Running 1 15m kube-system monitoring-influx-grafana-v1-piled 2/2 Running 0 15m ``` Some of the pods may take a few seconds to start up (during this time they'll show `Pending`), but check that they all show as `Running` after a short period. #### Run some examples Then, see [a simple nginx example](/docs/user-guide/simple-nginx) to try out your new cluster. For more complete applications, please look in the [examples directory](https://github.com/kubernetes/kubernetes/tree/{{page.githubbranch}}/examples/). The [guestbook example](https://github.com/kubernetes/kubernetes/tree/{{page.githubbranch}}/examples/guestbook/) is a good "getting started" walkthrough. ### Tearing down the cluster To remove/delete/teardown the cluster, use the `kube-down.sh` script. ```shell cd kubernetes cluster/kube-down.sh ``` Likewise, the `kube-up.sh` in the same directory will bring it back up. You do not need to rerun the `curl` or `wget` command: everything needed to setup the Kubernetes cluster is now on your workstation. ### Customizing The script above relies on Google Storage to stage the Kubernetes release. It then will start (by default) a single master VM along with 4 worker VMs. You can tweak some of these parameters by editing `kubernetes/cluster/gce/config-default.sh` You can view a transcript of a successful cluster creation [here](https://gist.github.com/satnam6502/fc689d1b46db9772adea). ### Troubleshooting #### Project settings You need to have the Google Cloud Storage API, and the Google Cloud Storage JSON API enabled. It is activated by default for new projects. Otherwise, it can be done in the Google Cloud Console. See the [Google Cloud Storage JSON API Overview](https://cloud.google.com/storage/docs/json_api/) for more details. Also ensure that-- as listed in the [Prerequsites section](#prerequisites)-- you've enabled the `Compute Engine Instance Group Manager API`, and can start up a GCE VM from the command line as in the [GCE Quickstart](https://cloud.google.com/compute/docs/quickstart) instructions. #### Cluster initialization hang If the Kubernetes startup script hangs waiting for the API to be reachable, you can troubleshoot by SSHing into the master and node VMs and looking at logs such as `/var/log/startupscript.log`. **Once you fix the issue, you should run `kube-down.sh` to cleanup** after the partial cluster creation, before running `kube-up.sh` to try again. #### SSH If you're having trouble SSHing into your instances, ensure the GCE firewall isn't blocking port 22 to your VMs. By default, this should work but if you have edited firewall rules or created a new non-default network, you'll need to expose it: `gcloud compute firewall-rules create default-ssh --network= --description "SSH allowed from anywhere" --allow tcp:22` Additionally, your GCE SSH key must either have no passcode or you need to be using `ssh-agent`. #### Networking The instances must be able to connect to each other using their private IP. The script uses the "default" network which should have a firewall rule called "default-allow-internal" which allows traffic on any port on the private IPs. If this rule is missing from the default network or if you change the network being used in `cluster/config-default.sh` create a new rule with the following field values: * Source Ranges: `10.0.0.0/8` * Allowed Protocols and Port: `tcp:1-65535;udp:1-65535;icmp` ## Support Level IaaS Provider | Config. Mgmt | OS | Networking | Docs | Conforms | Support Level -------------------- | ------------ | ------ | ---------- | --------------------------------------------- | ---------| ---------------------------- GCE | Saltstack | Debian | GCE | [docs](/docs/getting-started-guides/gce) | | Project For support level information on all solutions, see the [Table of solutions](/docs/getting-started-guides/#table-of-solutions) chart. ## Further reading Please see the [Kubernetes docs](/docs/) for more details on administering and using a Kubernetes cluster.