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README.md v 4

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Smaine Kahlouch 2015-10-04 21:59:09 +02:00
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README.md
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@ -79,7 +79,7 @@ The choice is defined with the variable '**overlay_network_plugin**'
There are several loadbalancing solutions. There are several loadbalancing solutions.
The ones i found suitable for kubernetes are [Vulcand]('http://vulcand.io/') and [Haproxy]('http://www.haproxy.org/') The ones i found suitable for kubernetes are [Vulcand]('http://vulcand.io/') and [Haproxy]('http://www.haproxy.org/')
My cluster is working with haproxy and kubernetes services are configured with the loadbalancing type 'nodePort'. My cluster is working with haproxy and kubernetes services are configured with the loadbalancing type '**nodePort**'.
eg: each node opens the same tcp port and forwards the traffic to the target pod wherever it is located. eg: each node opens the same tcp port and forwards the traffic to the target pod wherever it is located.
Then Haproxy can be configured to request kubernetes's api in order to loadbalance on the proper tcp port on the nodes. Then Haproxy can be configured to request kubernetes's api in order to loadbalance on the proper tcp port on the nodes.
@ -89,6 +89,24 @@ Please refer to the proper kubernetes documentation on [Services]('https://githu
### Check cluster status ### Check cluster status
#### Kubernetes components #### Kubernetes components
Master processes : kube-apiserver, kube-scheduler, kube-controller, kube-proxy
Nodes processes : kubelet, kube-proxy, [calico-node|flanneld]
* Check the status of the processes
```
systemctl status [process_name]
```
* Check the logs
```
journalctl -ae -u [process_name]
```
* Check the NAT rules
```
iptables -nLv -t nat
```
#### Calico networking #### Calico networking
Check if the calico-node container is running Check if the calico-node container is running
@ -107,13 +125,13 @@ calicoctl status
calicoctl pool show calicoctl pool show
``` ```
* Show the workloads (ip addresses of containers and where they're located) * Show the workloads (ip addresses of containers and their located)
``` ```
calicoctl endpoint show --detail calicoctl endpoint show --detail
``` ```
#### Flannel networking #### Flannel networking
#### Test dns server #### Test the dns server
* Create a file 'busybox.yaml' with the following content * Create a file 'busybox.yaml' with the following content
``` ```
apiVersion: v1 apiVersion: v1
@ -143,14 +161,14 @@ kubectl exec busybox -- nslookup kubernetes.default
``` ```
You should get an answer from the configured dns server You should get an answer from the configured dns server
Congrats ! now you can go through [kubernetes basics]('http://kubernetes.io/v1.0/basicstutorials.html') Congrats ! now you can go through [kubernetes basics](http://kubernetes.io/v1.0/basicstutorials.html)
Known issues Known issues
------------- -------------
### Node reboot and Calico ### Node reboot and Calico
There is a major issur with calico-kubernetes version 0.5.1 and kubernetes prior to 1.1 : 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. 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') 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 ### Monitoring addon
Until now i didn't managed to get the monitoring addon working. Until now i didn't managed to get the monitoring addon working.