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Merge pull request #9060 from errordeveloper/master

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coreos/azure: Version bump and doc update
This commit is contained in:
Eric Tune 2015-06-01 16:45:57 -07:00
commit 5520386b18
4 changed files with 41 additions and 39 deletions
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66
docs/getting-started-guides/coreos/azure/README.md
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@ -23,11 +23,11 @@ npm install
Now, all you need to do is:
```
./azure-login.js
./azure-login.js -u <your_username>
./create-kubernetes-cluster.js
```
This script will provision a cluster suitable for production use, where there is a ring of 3 dedicated etcd nodes, Kubernetes master and 2 minions. The `kube-00` VM will be the master, your work loads are only to be deployed on the minion nodes, `kube-01` and `kube-02`. Initially, all VMs are single-core, to ensure a user of the free tier can reproduce it without paying extra. I will show how to add more bigger VMs later.
This script will provision a cluster suitable for production use, where there is a ring of 3 dedicated etcd nodes, Kubernetes master and 2 nodes. The `kube-00` VM will be the master, your work loads are only to be deployed on the minion nodes, `kube-01` and `kube-02`. Initially, all VMs are single-core, to ensure a user of the free tier can reproduce it without paying extra. I will show how to add more bigger VMs later.
![VMs in Azure](initial_cluster.png)
@ -35,21 +35,21 @@ Once the creation of Azure VMs has finished, you should see the following:
```
...
azure_wrapper/info: Saved SSH config, you can use it like so: `ssh -F ./output/kubernetes_1c1496016083b4_ssh_conf <hostname>`
azure_wrapper/info: Saved SSH config, you can use it like so: `ssh -F ./output/kube_1c1496016083b4_ssh_conf <hostname>`
azure_wrapper/info: The hosts in this deployment are:
[ 'etcd-00', 'etcd-01', 'etcd-02', 'kube-00', 'kube-01', 'kube-02' ]
azure_wrapper/info: Saved state into `./output/kubernetes_1c1496016083b4_deployment.yml`
azure_wrapper/info: Saved state into `./output/kube_1c1496016083b4_deployment.yml`
```
Let's login to the master node like so:
```
ssh -F ./output/kubernetes_1c1496016083b4_ssh_conf kube-00
ssh -F ./output/kube_1c1496016083b4_ssh_conf kube-00
```
> Note: config file name will be different, make sure to use the one you see.
Check there are 2 minions in the cluster:
Check there are 2 nodes in the cluster:
```
core@kube-00 ~ $ kubectl get minions
core@kube-00 ~ $ kubectl get nodes
NAME LABELS STATUS
kube-01 environment=production Ready
kube-02 environment=production Ready
@ -68,11 +68,11 @@ kubectl create -f frontend-controller.json
kubectl create -f frontend-service.json
```
You need to wait for the pods to get deployed, run the following and wait for `STATUS` to change from `Unknown`, through `Pending` to `Running`.
You need to wait for the pods to get deployed, run the following and wait for `STATUS` to change from `Unknown`, through `Pending` to `Running`.
```
kubectl get pods --watch
```
> Note: the most time it will spend downloading Docker container images on each of the minions.
> Note: the most time it will spend downloading Docker container images on each of the nodes.
Eventually you should see:
```
@ -88,7 +88,7 @@ redis-slave-controller-gziey 10.2.1.4 slave brendanburns/redis
## Scaling
Two single-core minions are certainly not enough for a production system of today, and, as you can see, there is one _unassigned_ pod. Let's scale the cluster by adding a couple of bigger nodes.
Two single-core nodes are certainly not enough for a production system of today, and, as you can see, there is one _unassigned_ pod. Let's scale the cluster by adding a couple of bigger nodes.
You will need to open another terminal window on your machine and go to the same working directory (e.g. `~/Workspace/weave-demos/coreos-azure`).
@ -96,11 +96,11 @@ First, lets set the size of new VMs:
```
export AZ_VM_SIZE=Large
```
Now, run scale script with state file of the previous deployment and number of minions to add:
Now, run scale script with state file of the previous deployment and number of nodes to add:
```
./scale-kubernetes-cluster.js ./output/kubernetes_1c1496016083b4_deployment.yml 2
./scale-kubernetes-cluster.js ./output/kube_1c1496016083b4_deployment.yml 2
...
azure_wrapper/info: Saved SSH config, you can use it like so: `ssh -F ./output/kubernetes_8f984af944f572_ssh_conf <hostname>`
azure_wrapper/info: Saved SSH config, you can use it like so: `ssh -F ./output/kube_8f984af944f572_ssh_conf <hostname>`
azure_wrapper/info: The hosts in this deployment are:
[ 'etcd-00',
'etcd-01',
@ -110,43 +110,45 @@ azure_wrapper/info: The hosts in this deployment are:
'kube-02',
'kube-03',
'kube-04' ]
azure_wrapper/info: Saved state into `./output/kubernetes_8f984af944f572_deployment.yml`
azure_wrapper/info: Saved state into `./output/kube_8f984af944f572_deployment.yml`
```
> Note: this step has created new files in `./output`.
Back on `kube-00`:
```
core@kube-00 ~ $ kubectl get minions
NAME LABELS STATUS
kube-01 environment=production Ready
kube-02 environment=production Ready
kube-03 environment=production Ready
kube-04 environment=production Ready
core@kube-00 ~ $ kubectl get nodes
NAME LABELS STATUS
kube-01 environment=production Ready
kube-02 environment=production Ready
kube-03 environment=production Ready
kube-04 environment=production Ready
```
You can see that two more minions joined happily. Let's scale the number of Guestbook instances now.
You can see that two more nodes joined happily. Let's scale the number of Guestbook instances now.
First, double-check how many replication controllers there are:
```
core@kube-00 ~ $ kubectl get rc
CONTROLLER CONTAINER(S) IMAGE(S) SELECTOR REPLICAS
frontend-controller php-redis kubernetes/example-guestbook-php-redis name=frontend 3
redis-slave-controller slave brendanburns/redis-slave name=redisslave 2
CONTROLLER CONTAINER(S) IMAGE(S) SELECTOR REPLICAS
frontend php-redis kubernetes/example-guestbook-php-redis:v2 name=frontend 3
redis-master master redis name=redis-master 1
redis-slave slave kubernetes/redis-slave:v2 name=redis-slave 2
```
As there are 4 minions, let's scale proportionally:
As there are 4 nodes, let's scale proportionally:
```
core@kube-00 ~ $ kubectl scale --replicas=4 rc redis-slave-controller
core@kube-00 ~ $ kubectl scale --replicas=4 rc redis-slave
scaled
core@kube-00 ~ $ kubectl scale --replicas=4 rc frontend-controller
core@kube-00 ~ $ kubectl scale --replicas=4 rc frontend
scaled
```
Check what you have now:
```
kubectl get rc
CONTROLLER CONTAINER(S) IMAGE(S) SELECTOR REPLICAS
frontend-controller php-redis kubernetes/example-guestbook-php-redis name=frontend 4
redis-slave-controller slave brendanburns/redis-slave name=redisslave 4
core@kube-00 ~ $ kubectl get rc
CONTROLLER CONTAINER(S) IMAGE(S) SELECTOR REPLICAS
frontend php-redis kubernetes/example-guestbook-php-redis:v2 name=frontend 4
redis-master master redis name=redis-master 1
redis-slave slave kubernetes/redis-slave:v2 name=redis-slave 4
```
You now will have more instances of front-end Guestbook apps and Redis slaves; and, if you look up all pods labled `name=frontend`, you should see one running on each node.
@ -179,7 +181,7 @@ You should probably try deploy other [example apps](https://github.com/GoogleClo
If you don't wish care about the Azure bill, you can tear down the cluster. It's easy to redeploy it, as you can see.
```
./destroy-cluster.js ./output/kubernetes_8f984af944f572_deployment.yml
./destroy-cluster.js ./output/kube_8f984af944f572_deployment.yml
```
> Note: make sure to use the _latest state file_, as after scaling there is a new one.

6
docs/getting-started-guides/coreos/azure/cloud_config_templates/kubernetes-cluster-etcd-node-template.yml
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@ -24,12 +24,12 @@ coreos:
Documentation=https://github.com/coreos/etcd/
Requires=network-online.target
[Service]
Environment=ETCD2_RELEASE_TARBALL=https://github.com/coreos/etcd/releases/download/v2.0.9/etcd-v2.0.9-linux-amd64.tar.gz
Environment=ETCD2_RELEASE_TARBALL=https://github.com/coreos/etcd/releases/download/v2.0.11/etcd-v2.0.11-linux-amd64.tar.gz
ExecStartPre=/bin/mkdir -p /opt/bin
ExecStart=/opt/bin/curl-retry.sh --silent --location $ETCD2_RELEASE_TARBALL --output /tmp/etcd2.tgz
ExecStart=/bin/tar xzvf /tmp/etcd2.tgz -C /opt
ExecStartPost=/bin/ln -s /opt/etcd-v2.0.9-linux-amd64/etcd /opt/bin/etcd2
ExecStartPost=/bin/ln -s /opt/etcd-v2.0.9-linux-amd64/etcdctl /opt/bin/etcdctl2
ExecStartPost=/bin/ln -s /opt/etcd-v2.0.11-linux-amd64/etcd /opt/bin/etcd2
ExecStartPost=/bin/ln -s /opt/etcd-v2.0.11-linux-amd64/etcdctl /opt/bin/etcdctl2
RemainAfterExit=yes
Type=oneshot
[Install]

2
docs/getting-started-guides/coreos/azure/cloud_config_templates/kubernetes-cluster-main-nodes-template.yml
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@ -239,7 +239,7 @@ coreos:
Documentation=http://kubernetes.io/
Requires=network-online.target
[Service]
Environment=KUBE_RELEASE_TARBALL=https://github.com/GoogleCloudPlatform/kubernetes/releases/download/v0.17.0/kubernetes.tar.gz
Environment=KUBE_RELEASE_TARBALL=https://github.com/GoogleCloudPlatform/kubernetes/releases/download/v0.18.0/kubernetes.tar.gz
ExecStartPre=/bin/mkdir -p /opt/
ExecStart=/opt/bin/curl-retry.sh --silent --location $KUBE_RELEASE_TARBALL --output /tmp/kubernetes.tgz
ExecStart=/bin/tar xzvf /tmp/kubernetes.tgz -C /tmp/

6
docs/getting-started-guides/coreos/azure/lib/azure_wrapper.js
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@ -13,9 +13,9 @@ var inspect = require('util').inspect;
var util = require('./util.js');
var coreos_image_ids = {
'stable': '2b171e93f07c4903bcad35bda10acf22__CoreOS-Stable-647.0.0',
'beta': '2b171e93f07c4903bcad35bda10acf22__CoreOS-Beta-668.3.0', // untested
'alpha': '2b171e93f07c4903bcad35bda10acf22__CoreOS-Alpha-681.0.0' // untested
'stable': '2b171e93f07c4903bcad35bda10acf22__CoreOS-Stable-647.2.0',
'beta': '2b171e93f07c4903bcad35bda10acf22__CoreOS-Beta-681.0.0', // untested
'alpha': '2b171e93f07c4903bcad35bda10acf22__CoreOS-Alpha-695.0.0' // untested
};
var conf = {};