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kubernetes tutorial update

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Joseph Henry 2016-08-17 15:28:48 -07:00
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@ -3,33 +3,32 @@ Kubernetes + ZeroTier
A self-authorizing Kubernetes deployment on a ZeroTier private network. A self-authorizing Kubernetes deployment on a ZeroTier private network.
This is a quick tutorial for setting up a Kubernetes deployment which can self-authorize each new replica onto your private ZeroTier network with no additional configuration needed when you scale. The Kubernetes-specific instructions and content is based on the [hellonode](http://kubernetes.io/docs/hellonode/) tutorial. This is a quick tutorial for setting up a Kubernetes deployment which can self-authorize each new replica onto your private ZeroTier network with no additional configuration needed when you scale. The Kubernetes-specific instructions and content is based on the [hellonode](http://kubernetes.io/docs/hellonode/) tutorial. All of the files discussed below can be found [here]();
## Preliminary tasks ## Preliminary tasks
**Step 1: Go to [my.zerotier.com](https://www.my.zerotier.com) and generate an API key. This key will be used by ZeroTier to automatically authorize new instances of your VMs to join your deployment network during replication. **Step 1: Go to [my.zerotier.com](https://my.zerotier.com) and generate an API key. This key will be used by ZeroTier to automatically authorize new instances of your VMs to join your deployment network during replication.**a
**Step 2: Create a new `private` network. Take note of the network ID: `nwid` **Step 2: Create a new `private` network. Take note of the network ID: `nwid`**
**Step 3: Follow the instructions from the [hellonode](ttp://kubernetes.io/docs/hellonode/) tutorial and set up your development system (install Google Cloud SDK). **Step 3: Follow the instructions from the [hellonode](ttp://kubernetes.io/docs/hellonode/) tutorial and set up your development system (install Google Cloud SDK).**
## Construct docker container ## Construct docker container
Step 4: Create necessary files for inclusion in Dockerfile **Step 4: Create necessary files for inclusion in Dockerfile**
- `mkdir ztkube` - `mkdir ztkube`
### Add the following files to the `ztkube` directory. These files will be compiled into the Docker image. Add the following files to the `ztkube` directory. These files will be compiled into the Docker image.
Create an empty file to specify the private deployment network you created in *Step 2*: Create an empty file to specify the private deployment network you created in *Step 2*:
- `<nwid>.conf` - `<nwid>.conf`
- The `entrypoint.sh` script will start the ZeroTier service in the VM, attempt to join your deployment network and automatically authorize the new VM if your network is set to private.
``` ```
./zerotier ./zerotier
@ -37,7 +36,7 @@ zerotier-cli join $(NWID).conf
zerotier-cli net-auth $(NWID) $(DEVID) zerotier-cli net-auth $(NWID) $(DEVID)
``` ```
The cli tool config `.zerotierCliSettings`, this should contain your API keys to authorize new devices on your network. In this example the default controller is hosted by us at [my.zerotier.com](https://www.my.zerotier.com). YOu can host your own network controller and you'll need to modify the cli config accordingly: - The CLI tool config file `.zerotierCliSettings` should contain your API keys to authorize new devices on your network. In this example the default controller is hosted by us at [my.zerotier.com](https://my.zerotier.com). Alternatively, you can host your own network controller but you'll need to modify the CLI config file accordingly.
``` ```
{ {
@ -61,8 +60,7 @@ The cli tool config `.zerotierCliSettings`, this should contain your API keys to
``` ```
- The `Dockerfile` will copy the ZeroTier service as well as the ZeroTier CLI to the image:
`Dockerfile`
``` ```
FROM node:4.4 FROM node:4.4
@ -75,22 +73,38 @@ COPY .zerotierCliSettings <settings path>?>
CMD node server.js CMD node server.js
``` ```
Step 5: Lastly, build the image: - The `entrypoint.sh` script will start the ZeroTier service in the VM, attempt to join your deployment network and automatically authorize the new VM if your network is set to private.
**Step 5: Lastly, build the image:**
`docker build -t gcr.io/$PROJECT_ID/hello-node .` `docker build -t gcr.io/$PROJECT_ID/hello-node .`
Step 6: Build and push the docker image to your *Container Registry*
**Step 6: Push the docker image to your *Container Registry**
`gcloud docker push gcr.io/$PROJECT_ID/hello-node:v1` `gcloud docker push gcr.io/$PROJECT_ID/hello-node:v1`
Step 7: Create Kubernetes Cluster
**Step 7: Create Kubernetes Cluster**
`gcloud config set compute/zone us-central1-a` `gcloud config set compute/zone us-central1-a`
`gcloud container clusters create hello-world` `gcloud container clusters create hello-world`
`gcloud container clusters get-credentials hello-world` `gcloud container clusters get-credentials hello-world`
Step 8: Create your pod
**Step 8: Create your pod**
`kubectl run hello-node --image=gcr.io/$PROJECT_ID/hello-node:v1 --port=8080` `kubectl run hello-node --image=gcr.io/$PROJECT_ID/hello-node:v1 --port=8080`
Step 9: Scale
**Step 9: Scale**
`kubectl scale deployment hello-node --replicas=4` `kubectl scale deployment hello-node --replicas=4`
Now, after a minute or so you can use `zerotier-cli net-members <nwid>` to show all of your VM instances on your ZeroTier deployment network. If you haven't configured your local CLI, you can simply log into [my.zerotier.com](https://my.zerotier.com), go to *Networks -> <nwid>*. Now, after a minute or so you can use `zerotier-cli net-members <nwid>` to show all of your VM instances on your ZeroTier deployment network. If you haven't [configured your local CLI](), you can simply log into [my.zerotier.com](https://my.zerotier.com), go to *Networks -> <nwid>*.