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https://github.com/galexrt/k8s-vagrant-multi-node
A Kubernetes Vagrant Multi node environment using kubeadm.
https://github.com/galexrt/k8s-vagrant-multi-node
cluster kubernetes multi-node vagrant
Last synced: 2 days ago
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A Kubernetes Vagrant Multi node environment using kubeadm.
- Host: GitHub
- URL: https://github.com/galexrt/k8s-vagrant-multi-node
- Owner: galexrt
- License: apache-2.0
- Created: 2018-06-07T20:41:12.000Z (over 6 years ago)
- Default Branch: master
- Last Pushed: 2022-01-17T09:37:23.000Z (over 2 years ago)
- Last Synced: 2024-09-25T15:38:05.912Z (7 days ago)
- Topics: cluster, kubernetes, multi-node, vagrant
- Language: Makefile
- Homepage: https://k8s-vagrant-multi-node.galexrt.moe/
- Size: 2.6 MB
- Stars: 166
- Watchers: 15
- Forks: 81
- Open Issues: 8
-
Metadata Files:
- Readme: README.md
- License: LICENSE
- Code of conduct: CODE_OF_CONDUCT.md
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README
# k8s-vagrant-multi-node
[](https://travis-ci.org/galexrt/k8s-vagrant-multi-node)
This project was based on work from [coolsvap/kubeadm-vagrant](https://github.com/coolsvap/kubeadm-vagrant) by [@coolsvap](https://twitter.com/coolsvap), now it is mostly independent.
A demo of the start and destroy of a cluster can be found here: [README.md Demo section](#demo).
- [k8s-vagrant-multi-node](#k8s-vagrant-multi-node)
- [Prerequisites](#prerequisites)
- [Hardware Requirements](#hardware-requirements)
- [Quickstart](#quickstart)
- [VM OS Selection](#vm-os-selection)
- [Usage](#usage)
- [Starting the environment](#starting-the-environment)
- [Faster (parallel) environment start](#faster-parallel-environment-start)
- [Show status of VMs](#show-status-of-vms)
- [Shutting down the environment](#shutting-down-the-environment)
- [Copy local Docker image into VMs](#copy-local-docker-image-into-vms)
- [Data inside VM](#data-inside-vm)
- [`make` Targets](#make-targets)
- [Configuration / Variables](#configuration--variables)
- [Troubleshooting](#troubleshooting)
- [Demo](#demo)
- [Creating an Issue](#creating-an-issue)
## Prerequisites
* `make`
* `kubectl` - Optional when `KUBECTL_AUTO_CONF` is set to `false` (default: `true`).
* `grep`
* `cut`
* `rsync`
* Source for randomness (only used to generate a kubeadm token, when no custom `KUBETOKEN` is given):
* `/dev/urandom`
* `openssl` command - Fallback for when `/dev/urandom` is not available.
* Vagrant (>= `2.2.0`)
* Tested with `2.2.2` (if you should experience issues, please upgrade to at least this Vagrant version or higher)
* Plugins
* `vagrant-reload` **REQUIRED** For `BOX_OS=fedora` (set by default) and when using the `vagrant-reload*` targets, the `vagrant-reload` plugin is needed. An automatic attempt to install the plugin is made. To install manually run one of the following commands:
* `make vagrant-plugins` or
* `vagrant plugin install vagrant-reload`
* Vagrant Provider (one of the following two is needed)
* libvirt (`vagrant plugin install vagrant-libvirt`)
* Tested with `libvirtd` version `5.10.0`.
* Libvirt support is still a bit experimental and can be unstable (e.g., VMs not getting IPs).
* Troubleshooting: If your VM creation is hanging at `Waiting for domain to get an IP address...`, using `virsh` run `virsh force reset VM_NAME` (`VM_NAME` can be obtained using `virsh list` command) or in virt-manager `Force Reset` on the VM.
* Virtualbox (**WARNING** VirtualBox seems to hang the Makefile randomly for some people, `libvirt` is recommended)
* Tested with `6.0.0` (if you should experience issues, please upgrade to at least this version or higher)
* `VBoxManage` binary in `PATH`.
> **NOTE** `kubectl` is only needed when the `kubectl` auto configuration is enabled (default is enabled), to disable it set the variable `KUBECTL_AUTO_CONF` to `false`.
> For more information, see the [Configuration / Variables doc page](docs/configuration.md).
## Hardware Requirements
* Master
* CPU: 2 Cores (`MASTER_CPUS`)
* Memory: 2GB (`MASTER_MEMORY_SIZE_GB`)
* 1x Node:
* CPU: 1 Core (it is recommended to use at least 2 Cores; `NODE_CPUS`)
* Memory: 2GB (it is recommended to use more than 2GB; `NODE_MEMORY_SIZE_GB`)
These resources can be changed by setting the according variables for the `make up` command, see [Configuration / Variables doc page](docs/configuration.md).
## Quickstart
To start with the defaults, 1x master and 2x workers, run the following:
```shell
$ make up -j 3
```
The `-j3` will cause three VMs to be started in parallel to speed up the cluster creation.
> **NOTE** Your `kubectl` is automatically configured to use a context for the
> created cluster, after the master VM is started.
> The context is named after the directory the `Makefile` is in.
```shell
$ kubectl config current-context
k8s-vagrant-multi-node
$ kubectl get componentstatus
NAME STATUS MESSAGE ERROR
scheduler Healthy ok
controller-manager Healthy ok
etcd-0 Healthy {"health": "true"}
$ kubectl get nodes
NAME STATUS ROLES AGE VERSION
master Ready master 4m v1.17.3
node1 Ready 4m v1.17.3
node2 Ready 4m v1.17.3
```
## VM OS Selection
There are multiple sets of Vagrantfiles available (see [`vagrantfiles/`](/vagrantfiles/)) which can be used to use a different OS for the Kubernetes environment.
See [VM OS Selection doc page](docs/vm-os-selection.md).
## Usage
Also see [Usage doc page](docs/usage.md).
### Starting the environment
To start up the Vagrant Kubernetes multi node environment with the default of two worker nodes + a master (not parallel) run:
```shell
$ make up
```
> **NOTE** Your `kubectl` is automatically configured to use a context for the
> created cluster, after the master VM is started.
> The context is named after the directory the `Makefile` is in.
### Faster (parallel) environment start
To start up 4 VMs in parallel run (`-j` flag does not control how many (worker) VMs are started, the `NODE_COUNT` variable is used for that):
```shell
$ NODE_COUNT=3 make up -j4
```
The flag `-j CORES/THREADS` allows yout to set how many VMs (Makefile targets) will be run at the same time.
You can also use `-j $(nproc)` to start as many VMs as cores/threads you have in your machine.
So to start up all VMs (master and three nodes) in parallel, you would add one to the chosen `NODE_COUNT`.
### Show status of VMs
```shell
$ make status
master not created (virtualbox)
node1 not created (virtualbox)
node2 not created (virtualbox)
```
### Shutting down the environment
To destroy the Vagrant environment run:
```shell
$ make clean
$ make clean-data
```
### Copy local Docker image into VMs
The `make load-image` target can be used to copy a docker image from your local docker daemon to all the VMs in your cluster.
The `IMG` variable can be expressed in a few ways, for example:
```shell
$ make load-image IMG=your_name/your_image_name:your_tag
$ make load-image IMG=your_name/your_image_name
$ make load-image IMG=my-private-registry.com/your_name/your_image_name:your_tag
```
You can also specify a new image name and tag to use after the image has been copied to the VM's by setting the `TAG` variable.
This will not change the image/tag in your local docker daemon, it will only affect the image in the VM's.
```shell
$ make load-image IMG=repo/image:tag TAG=new_repo/new_image:new_tag
```
### Data inside VM
See the `data/VM_NAME/` directories, where `VM_NAME` is for example `master`.
### `make` Targets
See [`make` Targets doc page](docs/make-targets.md).
## Configuration / Variables
See [Configuration / Variables doc page](docs/configuration.md).
## Troubleshooting
See [Troubleshooting doc page](docs/troubleshooting.md).
## Demo
See [Demo doc page](docs/demo.md).
***
## Creating an Issue
Please attach the output of the `make versions` command to the issue as is shown in the issue template. This makes debugging easier.