README.md v 2
Smaine Kahlouch
parent
e74ad80fe4
commit
a37273b422
90
README.md
90
README.md
|
|
@ -11,24 +11,25 @@ The target servers must have access to the Internet in order to pull docker imaq
|
|||
Ansible v1.9.x
|
||||
|
||||
### Components
|
||||
* [kubernetes]('https://github.com/kubernetes/kubernetes/releases') v1.0.6
|
||||
* [etcd]('https://github.com/coreos/etcd/releases') v2.2.0
|
||||
* [calicoctl]('https://github.com/projectcalico/calico-docker/releases') v0.5.1
|
||||
* [flanneld]('https://github.com/coreos/flannel/releases') v0.5.3
|
||||
* [docker-gc]('https://github.com/spotify/docker-gc')
|
||||
* [kubernetes](https://github.com/kubernetes/kubernetes/releases) v1.0.6
|
||||
* [etcd](https://github.com/coreos/etcd/releases) v2.2.0
|
||||
* [calicoctl](https://github.com/projectcalico/calico-docker/releases) v0.5.1
|
||||
* [flanneld](https://github.com/coreos/flannel/releases) v0.5.3
|
||||
* [docker-gc](https://github.com/spotify/docker-gc)
|
||||
|
||||
|
||||
Ansible
|
||||
-------------------------
|
||||
### Download binaries
|
||||
A role allows to download required binaries which will be stored in a directory defined by the variable
|
||||
'local_release_dir' (by default /tmp).
|
||||
Please ensure that you have enough disk space there (about 1G).
|
||||
**'local_release_dir'** (by default /tmp).
|
||||
Please ensure that you have enough disk space there (about **1G**).
|
||||
|
||||
Note: Whenever you'll need to change the version of a software, you'll have to erase the content of this directory.
|
||||
**Note**: Whenever you'll need to change the version of a software, you'll have to erase the content of this directory.
|
||||
|
||||
|
||||
### Variables
|
||||
The main variables to change are located in the directory ```environments/[env_name]/group_vars/k8s-cluster.yml```.
|
||||
|
||||
### Playbook
|
||||
```
|
||||
|
|
@ -64,12 +65,13 @@ ansible-playbook -i environments/dev/inventory cluster.yml
|
|||
|
||||
Kubernetes
|
||||
-------------------------
|
||||
### Check cluster status
|
||||
|
||||
### Network Overlay
|
||||
You can choose between 2 network overlays. Only one must be chosen.
|
||||
flannel: gre/vxlan (layer 2) networking
|
||||
calico: bgp (layer 3) networking.
|
||||
**flannel**: gre/vxlan (layer 2) networking
|
||||
**calico**: bgp (layer 3) networking.
|
||||
|
||||
The choice is defined with the variable '**overlay_network_plugin**'
|
||||
|
||||
### Expose a service
|
||||
There are several loadbalancing solution.
|
||||
|
|
@ -82,13 +84,77 @@ Then Haproxy can be configured to request kubernetes's api in order to loadbalan
|
|||
|
||||
Please refer to the proper kubernetes documentation on [Services]('https://github.com/kubernetes/kubernetes/blob/release-1.0/docs/user-guide/services.md')
|
||||
|
||||
### Check cluster status
|
||||
|
||||
#### Kubernetes components
|
||||
|
||||
#### Calico networking
|
||||
Check if the calico-node container is running
|
||||
```
|
||||
docker ps | grep calico
|
||||
```
|
||||
|
||||
The **calicoctl** command allows to check the status of the network workloads.
|
||||
* Check the status of Calico nodes
|
||||
```
|
||||
calicoctl status
|
||||
```
|
||||
|
||||
* Show the configured network subnet for containers
|
||||
```
|
||||
calicoctl pool show
|
||||
```
|
||||
|
||||
* Show the workloads (ip addresses of containers and where they're located)
|
||||
```
|
||||
calicoctl endpoint show --detail
|
||||
```
|
||||
#### Flannel networking
|
||||
|
||||
#### Test dns server
|
||||
* Create a file 'busybox.yaml' with the following content
|
||||
```
|
||||
apiVersion: v1
|
||||
kind: Pod
|
||||
metadata:
|
||||
name: busybox
|
||||
namespace: default
|
||||
spec:
|
||||
containers:
|
||||
- image: busybox
|
||||
command:
|
||||
- sleep
|
||||
- "3600"
|
||||
imagePullPolicy: IfNotPresent
|
||||
name: busybox
|
||||
restartPolicy: Always
|
||||
```
|
||||
|
||||
* Create the pod
|
||||
```
|
||||
kubectl create -f busybox.yaml
|
||||
```
|
||||
|
||||
* When the pod is ready, execute the following command
|
||||
```
|
||||
kubectl exec busybox -- nslookup kubernetes.default
|
||||
```
|
||||
You should get an answer from the configured dns server
|
||||
|
||||
Known issues
|
||||
-------------
|
||||
### Node reboot and Calico
|
||||
There is a major issur with calico-kubernetes version 0.5.1 and kubernetes prior to 1.1 :
|
||||
After host reboot, the pods networking are not configured again, they are started without any network configuration.
|
||||
This issue will be fixed when kubernetes 1.1 will be released as described in this [issue]('https://github.com/projectcalico/calico-kubernetes/issues/34')
|
||||
|
||||
### Monitoring addon
|
||||
Until now i didn't managed to get the monitoring addon working.
|
||||
|
||||
### Etcd failover
|
||||
### Listen on secure port only
|
||||
Currently the api-server listens on both secure and insecure ports.
|
||||
The insecure port is mainly used for calico.
|
||||
Will be fixed soon.
|
||||
|
||||
Author Information
|
||||
------------------
|
||||
|
|
|
|||
Loading…
Reference in New Issue