mirror of
https://github.com/k3s-io/kubernetes.git
synced 2025-07-23 19:56:01 +00:00
Merge pull request #4597 from whitmo/juju-getting-started
A getting started guide for juju
This commit is contained in:
Eric Tune
commit
aea98765f4
@ -20,6 +20,14 @@ Ovirt | | | [docs](../../docs/getting-started-guide
|
||||
Rackspace | CoreOS | CoreOS | [docs](../../docs/getting-started-guides/rackspace.md) | Inactive |
|
||||
Bare-metal | custom | CentOS | [docs](../../docs/getting-started-guides/centos/centos_manual_config.md) | Community(@coolsvap) | Uses K8s v0.9.1
|
||||
libvirt/KVM | CoreOS | CoreOS | [docs](../../docs/getting-started-guides/libvirt-coreos.md) | Community (@lhuard1A) |
|
||||
Bare-metal | custom | CentOS | [docs](../../docs/getting-started-guides/centos/centos_manual_config.md) | Community(@coolsvap) | Uses K8s v0.9.1
|
||||
AWS | Juju | Ubuntu | [docs](../../docs/getting-started-guides/juju.md) | [Community](https://github.com/whitmo/bundle-kubernetes) ( [@whit](https://github.com/whitmo), [@matt](https://github.com/mbruzek), [@chuck](https://github.com/chuckbutler) ) | [Tested](http://reports.vapour.ws/charm-tests-by-charm/kubernetes) K8s v0.8.1
|
||||
OpenStack/HPCloud | Juju | Ubuntu | [docs](../../docs/getting-started-guides/juju.md) | [Community](https://github.com/whitmo/bundle-kubernetes) ( [@whit](https://github.com/whitmo), [@matt](https://github.com/mbruzek), [@chuck](https://github.com/chuckbutler) ) | [Tested](http://reports.vapour.ws/charm-tests-by-charm/kubernetes) K8s v0.8.1
|
||||
Joyent | Juju | Ubuntu | [docs](../../docs/getting-started-guides/juju.md) | [Community](https://github.com/whitmo/bundle-kubernetes) ( [@whit](https://github.com/whitmo), [@matt](https://github.com/mbruzek), [@chuck](https://github.com/chuckbutler) ) | [Tested](http://reports.vapour.ws/charm-tests-by-charm/kubernetes) K8s v0.8.1
|
||||
|
||||
|
||||
|
||||
|
||||
Definition of columns:
|
||||
- **IaaS Provider** is who/what provides the virtual or physical machines (nodes) that Kubernetes runs on.
|
||||
- **OS** is the base operating system of the nodes.
|
||||
|
||||
190
docs/getting-started-guides/juju.md
Normal file
190
docs/getting-started-guides/juju.md
Normal file
@ -0,0 +1,190 @@
|
||||
## Getting start with Juju
|
||||
|
||||
Juju handles provisioning machines and deploying complex systems to a
|
||||
wide number of clouds.
|
||||
|
||||
|
||||
|
||||
### Prerequisites
|
||||
|
||||
#### On Ubuntu
|
||||
|
||||
[Install the Juju client](https://juju.ubuntu.com/install) on your
|
||||
local ubuntu system:
|
||||
|
||||
sudo add-apt-repository ppa:juju/stable
|
||||
sudo apt-get update
|
||||
sudo apt-get install juju-core juju-quickstart
|
||||
|
||||
|
||||
#### With Docker
|
||||
|
||||
If you are not using ubuntu or prefer the isolation of docker, you may
|
||||
run the following:
|
||||
|
||||
mkdir ~/.juju
|
||||
sudo docker run -v ~/.juju:/home/ubuntu/.juju -ti whitmo/jujubox:latest
|
||||
|
||||
At this point from either path you will have access to the `juju
|
||||
quickstart` command.
|
||||
|
||||
To set up the credentials for your chosen cloud run:
|
||||
|
||||
juju quickstart --constraints="mem=3.75G" -i
|
||||
|
||||
Follow the dialogue and choose `save` and `use`. Quickstart will now
|
||||
bootstrap the juju root node and setup the juju web based user
|
||||
interface.
|
||||
|
||||
|
||||
## Launch Kubernetes cluster
|
||||
|
||||
juju quickstart https://raw.githubusercontent.com/whitmo/bundle-kubernetes/master/bundles.yaml
|
||||
|
||||
First this command will start a curses based gui allowing you to set
|
||||
up credentials and other environmental settings for several different
|
||||
providers including Azure and AWS.
|
||||
|
||||
Next it will deploy the kubernetes master, etcd, 2 minions with flannel networking.
|
||||
|
||||
|
||||
## Exploring the cluster
|
||||
|
||||
Juju status provides information about each unit in the cluster:
|
||||
|
||||
juju status --format=oneline
|
||||
|
||||
- etcd/0: 52.0.74.109 (started)
|
||||
- flannel/0: 52.0.149.150 (started)
|
||||
- flannel/1: 52.0.185.81 (started)
|
||||
- juju-gui/0: 52.1.150.81 (started)
|
||||
- kubernetes/0: 52.0.149.150 (started)
|
||||
- kubernetes/1: 52.0.185.81 (started)
|
||||
- kubernetes-master/0: 52.1.120.142 (started)
|
||||
|
||||
You can use `juju ssh` to access any of the units:
|
||||
|
||||
juju ssh kubernetes-master/0
|
||||
|
||||
|
||||
## Run some containers!
|
||||
|
||||
`kubectl` is available on the kubernetes master node. We'll ssh in to
|
||||
launch some containers, but one could use kubectl locally setting
|
||||
KUBERNETES_MASTER to point at the ip of `kubernetes-master/0`.
|
||||
|
||||
No pods will be available before starting a container:
|
||||
|
||||
kubectl get pods
|
||||
POD CONTAINER(S) IMAGE(S) HOST LABELS STATUS
|
||||
|
||||
kubectl get replicationControllers
|
||||
CONTROLLER CONTAINER(S) IMAGE(S) SELECTOR REPLICAS
|
||||
|
||||
We'll follow the aws-coreos example. Create a pod manifest: `pod.json`
|
||||
|
||||
```
|
||||
{
|
||||
"id": "hello",
|
||||
"kind": "Pod",
|
||||
"apiVersion": "v1beta1",
|
||||
"desiredState": {
|
||||
"manifest": {
|
||||
"version": "v1beta1",
|
||||
"id": "hello",
|
||||
"containers": [{
|
||||
"name": "hello",
|
||||
"image": "quay.io/kelseyhightower/hello",
|
||||
"ports": [{
|
||||
"containerPort": 80,
|
||||
"hostPort": 80
|
||||
}]
|
||||
}]
|
||||
}
|
||||
},
|
||||
"labels": {
|
||||
"name": "hello",
|
||||
"environment": "testing"
|
||||
}
|
||||
}
|
||||
```
|
||||
|
||||
Create the pod with kubectl:
|
||||
|
||||
kubectl create -f pod.json
|
||||
|
||||
|
||||
Get info on the pod:
|
||||
|
||||
kubectl get pods
|
||||
|
||||
|
||||
To test the hello app, we'll need to locate which minion is hosting
|
||||
the container. Better tooling for using juju to introspect container
|
||||
is in the works but for let'suse `juju run` and `juju status` to find
|
||||
our hello app.
|
||||
|
||||
Exit out of our ssh session and run:
|
||||
|
||||
juju run --unit kubernetes/0 "docker ps -n=1"
|
||||
...
|
||||
juju run --unit kubernetes/1 "docker ps -n=1"
|
||||
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
|
||||
02beb61339d8 quay.io/kelseyhightower/hello:latest /hello About an hour ago Up About an hour k8s_hello....
|
||||
|
||||
|
||||
We see `kubernetes/1` has our container, we can open port 80:
|
||||
|
||||
juju run --unit kubernetes/1 "open-port 80"
|
||||
juju expose kubernetes
|
||||
sudo apt-get install curl
|
||||
curl $(juju status --format=oneline kubernetes/1 | cut -d' ' -f3)
|
||||
|
||||
Finally delete the pod:
|
||||
|
||||
juju ssh kubernetes-master/0
|
||||
kubectl delete pods hello
|
||||
|
||||
|
||||
## Scale out cluster
|
||||
|
||||
We can add minion units like so:
|
||||
|
||||
juju add-unit flannel # creates unit flannel/2
|
||||
juju add-unit kubernetes --to flannel/2
|
||||
|
||||
|
||||
## Tear down cluster
|
||||
|
||||
juju destroy-environment --force `juju env`
|
||||
|
||||
|
||||
## More Info
|
||||
|
||||
Kubernetes Bundle on Github
|
||||
|
||||
- [Bundle Repository](https://github.com/whitmo/bundle-kubernetes)
|
||||
* [Kubernetes master charm](https://github.com/whitmo/charm-kubernetes-master)
|
||||
* [Kubernetes mininion charm](https://github.com/whitmo/charm-kubernetes)
|
||||
- [Bundle Documentation](http://whitmo.github.io/bundle-kubernetes)
|
||||
- [More about Juju](https://juju.ubuntu.com)
|
||||
|
||||
|
||||
### Cloud compatibility
|
||||
|
||||
Juju runs natively against a variety of cloud providers and can be
|
||||
made to work against many more using a generic manual provider.
|
||||
|
||||
|
||||
|
||||
Provider | v0.8.1
|
||||
-------------- | -------
|
||||
AWS | [Pass](http://reports.vapour.ws/charm-test-details/charm-bundle-test-parent-136)
|
||||
HPCloud | [Pass](http://reports.vapour.ws/charm-test-details/charm-bundle-test-parent-136)
|
||||
OpenStack | [Pass](http://reports.vapour.ws/charm-test-details/charm-bundle-test-parent-136)
|
||||
Joyent | [Pass](http://reports.vapour.ws/charm-test-details/charm-bundle-test-parent-136)
|
||||
Azure | TBD
|
||||
Digital Ocean | TBD
|
||||
MAAS (bare metal) | TBD
|
||||
GCE | TBD
|
||||
|
||||
Loading…
Reference in New Issue
Block a user