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Update docker-multinode instructions and version. Also run kube-proxy in a pod in the docker-multnode manifest

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Lucas Käldström
2016-01-11 16:45:56 +02:00
parent a45c87864e
commit 7d497441b3
7 changed files with 191 additions and 127 deletions
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50
docs/getting-started-guides/docker-multinode/worker.md
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@@ -34,11 +34,19 @@ Documentation for other releases can be found at
## Adding a Kubernetes worker node via Docker.
These instructions are very similar to the master set-up above, but they are duplicated for clarity.
You need to repeat these instructions for each node you want to join the cluster.
We will assume that the IP address of this node is `${NODE_IP}` and you have the IP address of the master in `${MASTER_IP}` that you created in the [master instructions](master.md). We'll need to run several versioned Kubernetes components, so we'll assume that the version we want
to run is `${K8S_VERSION}`, which should hold a value such as "1.0.7".
We will assume that you have the IP address of the master in `${MASTER_IP}` that you created in the [master instructions](master.md). We'll need to run several versioned Kubernetes components, so we'll assume that the version we want
to run is `${K8S_VERSION}`, which should hold a value such as "1.1.3".
Enviroinment variables used:
```sh
export MASTER_IP=<the_master_ip_here>
export K8S_VERSION=<your_k8s_version (e.g. 1.1.3)>
export FLANNEL_VERSION=<your_flannel_version (e.g. 0.5.5)>
export FLANNEL_IFACE=<flannel_interface (defaults to eth0)>
```
For each worker node, there are three steps:
* [Set up `flanneld` on the worker node](#set-up-flanneld-on-the-worker-node)
@@ -50,8 +58,7 @@ For each worker node, there are three steps:
As before, the Flannel daemon is going to provide network connectivity.
_Note_:
There is a [bug](https://github.com/docker/docker/issues/14106) in Docker 1.7.0 that prevents this from working correctly.
Please install Docker 1.6.2 or Docker 1.7.1 or Docker 1.8.3.
This guide expects **Docker 1.7.1 or higher**.
#### Set up a bootstrap docker
@@ -91,10 +98,18 @@ or it may be something else.
Now run flanneld itself, this call is slightly different from the above, since we point it at the etcd instance on the master.
```sh
sudo docker -H unix:///var/run/docker-bootstrap.sock run -d --net=host --privileged -v /dev/net:/dev/net quay.io/coreos/flannel:0.5.5 /opt/bin/flanneld --ip-masq --etcd-endpoints=http://${MASTER_IP}:4001
sudo docker -H unix:///var/run/docker-bootstrap.sock run -d \
--net=host \
--privileged \
-v /dev/net:/dev/net \
quay.io/coreos/flannel:${FLANNEL_VERSION} \
/opt/bin/flanneld \
--ip-masq \
--etcd-endpoints=http://${MASTER_IP}:4001 \
--iface=${FLANNEL_IFACE}
```
The previous command should have printed a really long hash, copy this hash.
The previous command should have printed a really long hash, the container id, copy this hash.
Now get the subnet settings from flannel:
@@ -134,7 +149,7 @@ Again this is system dependent, it may be:
sudo /etc/init.d/docker start
```
it may be:
or it may be:
```sh
systemctl start docker
@@ -158,7 +173,16 @@ sudo docker run \
--privileged=true \
--pid=host \
-d \
gcr.io/google_containers/hyperkube:v${K8S_VERSION} /hyperkube kubelet --api-servers=http://${MASTER_IP}:8080 --v=2 --address=0.0.0.0 --enable-server --hostname-override=$(hostname -i) --cluster-dns=10.0.0.10 --cluster-domain=cluster.local
gcr.io/google_containers/hyperkube:v${K8S_VERSION} \
/hyperkube kubelet \
--allow-privileged=true \
--api-servers=http://${MASTER_IP}:8080 \
--v=2 \
--address=0.0.0.0 \
--enable-server \
--containerized \
--cluster-dns=10.0.0.10 \
--cluster-domain=cluster.local
```
#### Run the service proxy
@@ -166,7 +190,13 @@ sudo docker run \
The service proxy provides load-balancing between groups of containers defined by Kubernetes `Services`
```sh
sudo docker run -d --net=host --privileged gcr.io/google_containers/hyperkube:v${K8S_VERSION} /hyperkube proxy --master=http://${MASTER_IP}:8080 --v=2
sudo docker run -d \
--net=host \
--privileged \
gcr.io/google_containers/hyperkube:v${K8S_VERSION} \
/hyperkube proxy \
--master=http://${MASTER_IP}:8080 \
--v=2
```
### Next steps