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Update fedora_ansible_config.md

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2016-05-22 14:46:52 -07:00
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docs/getting-started-guides/fedora/fedora_ansible_config.md
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--- ---
--- ---
Configuring Kubernetes on Fedora via Ansible offers a simple way to quickly create a clustered environment with little effort. Configuring Kubernetes on Fedora via Ansible offers a simple way to quickly create a clustered environment with little effort.
* TOC * TOC
{:toc} {:toc}
## Prerequisites ## Prerequisites
@@ -18,12 +18,12 @@ The hosts can be virtual or bare metal. Ansible will take care of the rest of th
A Kubernetes cluster requires etcd, a master, and n nodes, so we will create a cluster with three hosts, for example: A Kubernetes cluster requires etcd, a master, and n nodes, so we will create a cluster with three hosts, for example:
```shell ```shell
master,etcd = kube-master.example.com master,etcd = kube-master.example.com
node1 = kube-node-01.example.com node1 = kube-node-01.example.com
node2 = kube-node-02.example.com node2 = kube-node-02.example.com
``` ```
**Make sure your local machine has** **Make sure your local machine has**
- ansible (must be 1.9.0+) - ansible (must be 1.9.0+)
@@ -32,22 +32,22 @@ master,etcd = kube-master.example.com
If not If not
```shell ```shell
yum install -y ansible git python-netaddr yum install -y ansible git python-netaddr
``` ```
**Now clone down the Kubernetes repository** **Now clone down the Kubernetes repository**
```shell ```shell
git clone https://github.com/kubernetes/contrib.git git clone https://github.com/kubernetes/contrib.git
cd contrib/ansible cd contrib/ansible
``` ```
**Tell ansible about each machine and its role in your cluster** **Tell ansible about each machine and its role in your cluster**
Get the IP addresses from the master and nodes. Add those to the `~/contrib/ansible/inventory` file on the host running Ansible. Get the IP addresses from the master and nodes. Add those to the `~/contrib/ansible/inventory` file on the host running Ansible.
```shell ```shell
[masters] [masters]
kube-master.example.com kube-master.example.com
@@ -57,8 +57,8 @@ kube-master.example.com
[nodes] [nodes]
kube-node-01.example.com kube-node-01.example.com
kube-node-02.example.com kube-node-02.example.com
``` ```
## Setting up ansible access to your nodes ## Setting up ansible access to your nodes
If you already are running on a machine which has passwordless ssh access to the kube-master and kube-node-{01,02} nodes, and 'sudo' privileges, simply set the value of `ansible_ssh_user` in `~/contrib/ansible/group_vars/all.yml` to the username which you use to ssh to the nodes (i.e. `fedora`), and proceed to the next step... If you already are running on a machine which has passwordless ssh access to the kube-master and kube-node-{01,02} nodes, and 'sudo' privileges, simply set the value of `ansible_ssh_user` in `~/contrib/ansible/group_vars/all.yml` to the username which you use to ssh to the nodes (i.e. `fedora`), and proceed to the next step...
@@ -67,52 +67,52 @@ If you already are running on a machine which has passwordless ssh access to the
edit: ~/contrib/ansible/group_vars/all.yml edit: ~/contrib/ansible/group_vars/all.yml
```yaml ```yaml
ansible_ssh_user: root ansible_ssh_user: root
``` ```
**Configuring ssh access to the cluster** **Configuring ssh access to the cluster**
If you already have ssh access to every machine using ssh public keys you may skip to [setting up the cluster](#setting-up-the-cluster) If you already have ssh access to every machine using ssh public keys you may skip to [setting up the cluster](#setting-up-the-cluster)
Make sure your local machine (root) has an ssh key pair if not Make sure your local machine (root) has an ssh key pair if not
```shell ```shell
ssh-keygen ssh-keygen
``` ```
Copy the ssh public key to **all** nodes in the cluster Copy the ssh public key to **all** nodes in the cluster
```shell ```shell
for node in kube-master.example.com kube-node-01.example.com kube-node-02.example.com; do for node in kube-master.example.com kube-node-01.example.com kube-node-02.example.com; do
ssh-copy-id ${node} ssh-copy-id ${node}
done done
``` ```
## Setting up the cluster ## Setting up the cluster
Although the default value of variables in `~/contrib/ansible/group_vars/all.yml` should be good enough, if not, change them as needed. Although the default value of variables in `~/contrib/ansible/group_vars/all.yml` should be good enough, if not, change them as needed.
```conf ```conf
edit: ~/contrib/ansible/group_vars/all.yml edit: ~/contrib/ansible/group_vars/all.yml
``` ```
**Configure access to kubernetes packages** **Configure access to kubernetes packages**
Modify `source_type` as below to access kubernetes packages through the package manager. Modify `source_type` as below to access kubernetes packages through the package manager.
```yaml ```yaml
source_type: packageManager source_type: packageManager
``` ```
**Configure the IP addresses used for services** **Configure the IP addresses used for services**
Each Kubernetes service gets its own IP address. These are not real IPs. You need only select a range of IPs which are not in use elsewhere in your environment. Each Kubernetes service gets its own IP address. These are not real IPs. You need only select a range of IPs which are not in use elsewhere in your environment.
```yaml ```yaml
kube_service_addresses: 10.254.0.0/16 kube_service_addresses: 10.254.0.0/16
``` ```
**Managing flannel** **Managing flannel**
Modify `flannel_subnet`, `flannel_prefix` and `flannel_host_prefix` only if defaults are not appropriate for your cluster. Modify `flannel_subnet`, `flannel_prefix` and `flannel_host_prefix` only if defaults are not appropriate for your cluster.
@@ -122,32 +122,32 @@ Modify `flannel_subnet`, `flannel_prefix` and `flannel_host_prefix` only if defa
Set `cluster_logging` to false or true (default) to disable or enable logging with elasticsearch. Set `cluster_logging` to false or true (default) to disable or enable logging with elasticsearch.
```yaml ```yaml
cluster_logging: true cluster_logging: true
``` ```
Turn `cluster_monitoring` to true (default) or false to enable or disable cluster monitoring with heapster and influxdb. Turn `cluster_monitoring` to true (default) or false to enable or disable cluster monitoring with heapster and influxdb.
```yaml ```yaml
cluster_monitoring: true cluster_monitoring: true
``` ```
Turn `dns_setup` to true (recommended) or false to enable or disable whole DNS configuration. Turn `dns_setup` to true (recommended) or false to enable or disable whole DNS configuration.
```yaml ```yaml
dns_setup: true dns_setup: true
``` ```
**Tell ansible to get to work!** **Tell ansible to get to work!**
This will finally setup your whole Kubernetes cluster for you. This will finally setup your whole Kubernetes cluster for you.
```shell ```shell
cd ~/contrib/ansible/ cd ~/contrib/ansible/
./setup.sh ./setup.sh
``` ```
## Testing and using your new cluster ## Testing and using your new cluster
That's all there is to it. It's really that easy. At this point you should have a functioning Kubernetes cluster. That's all there is to it. It's really that easy. At this point you should have a functioning Kubernetes cluster.
@@ -156,25 +156,26 @@ That's all there is to it. It's really that easy. At this point you should hav
Run the following on the kube-master: Run the following on the kube-master:
```shell ```shell
kubectl get nodes kubectl get nodes
``` ```
**Show services running on masters and nodes** **Show services running on masters and nodes**
```shell ```shell
systemctl | grep -i kube systemctl | grep -i kube
``` ```
**Show firewall rules on the masters and nodes** **Show firewall rules on the masters and nodes**
```shell ```shell
iptables -nvL iptables -nvL
``` ```
**Create /tmp/apache.json on the master with the following contents and deploy pod** **Create /tmp/apache.json on the master with the following contents and deploy pod**
```json
{ {
"kind": "Pod", "kind": "Pod",
"apiVersion": "v1", "apiVersion": "v1",
@@ -199,29 +200,38 @@ iptables -nvL
] ]
} }
} }
} ```
```
```shell
kubectl create -f /tmp/apache.json kubectl create -f /tmp/apache.json
kubectl create -f /tmp/apache.json ```
```
**Check where the pod was created** **Check where the pod was created**
```shell
kubectl get pods kubectl get pods
kubectl get pods ```
```
**Check Docker status on nodes** **Check Docker status on nodes**
```shell
docker ps docker ps
docker images docker images
docker images ```
```
**After the pod is 'Running' Check web server access on the node** **After the pod is 'Running' Check web server access on the node**
```shell
curl http://localhost curl http://localhost
curl http://localhost ```
```
That's it !
## Support Level
IaaS Provider | Config. Mgmt | OS | Networking | Docs | Conforms | Support Level
-------------------- | ------------ | ------ | ---------- | --------------------------------------------- | ---------| ----------------------------
Bare-metal | Ansible | Fedora | flannel | [docs](/docs/getting-started-guides/fedora/fedora_ansible_config) | | Project
For support level information on all solutions, see the [Table of solutions](/docs/getting-started-guides/#table-of-solutions) chart.