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fix rendering issue of docker.md

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This commit is contained in:
Christoph Held
2016-08-03 09:56:37 +02:00
parent 7a3b9705d8
commit 67a4bcbb63
1 changed files with 60 additions and 54 deletions
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docs/getting-started-guides/docker.md
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@@ -21,80 +21,86 @@ Here's a diagram of what the final result will look like:
**Note: These steps have not been tested with the [Docker For Mac or Docker For Windows beta programs](https://blog.docker.com/2016/03/docker-for-mac-windows-beta/).** **Note: These steps have not been tested with the [Docker For Mac or Docker For Windows beta programs](https://blog.docker.com/2016/03/docker-for-mac-windows-beta/).**
1. You need to have Docker version >= "1.10" installed on the machine. 1) You need to have Docker version >= "1.10" installed on the machine.
2. Enable mount propagation. Hyperkube is running in a container which has to mount volumes for other containers, for example in case of persistent storage. The required steps depend on the init system.
2) Enable mount propagation. Hyperkube is running in a container which has to mount volumes for other containers, for example in case of persistent storage. The required steps depend on the init system.
In case of **systemd**, change MountFlags in the Docker unit file to shared. In case of **systemd**, change MountFlags in the Docker unit file to shared.
```shell
DOCKER_CONF=$(systemctl cat docker | head -1 | awk '{print $2}')
sed -i.bak 's/^\(MountFlags=\).*/\1shared/' $DOCKER_CONF
systemctl daemon-reload
systemctl restart docker
```
**Otherwise**, manually set the mount point used by Hyperkube to be shared: ```shell
```shell DOCKER_CONF=$(systemctl cat docker | head -1 | awk '{print $2}')
mkdir -p /var/lib/kubelet sed -i.bak 's/^\(MountFlags=\).*/\1shared/' $DOCKER_CONF
mount --bind /var/lib/kubelet /var/lib/kubelet systemctl daemon-reload
mount --make-shared /var/lib/kubelet systemctl restart docker
``` ```
**Otherwise**, manually set the mount point used by Hyperkube to be shared:
```shell
mkdir -p /var/lib/kubelet
mount --bind /var/lib/kubelet /var/lib/kubelet
mount --make-shared /var/lib/kubelet
```
### Run it ### Run it
1. Decide which Kubernetes version to use. Set the `${K8S_VERSION}` variable to a version of Kubernetes >= "v1.2.0". #### Step 1: Decide which Kubernetes version to use
Set the `${K8S_VERSION}` variable to a version of Kubernetes >= "v1.2.0".
If you'd like to use the current **stable** version of Kubernetes, run the following: If you'd like to use the current **stable** version of Kubernetes, run the following:
```sh ```sh
export K8S_VERSION=$(curl -sS https://storage.googleapis.com/kubernetes-release/release/stable.txt) export K8S_VERSION=$(curl -sS https://storage.googleapis.com/kubernetes-release/release/stable.txt)
``` ```
and for the **latest** available version (including unstable releases): and for the **latest** available version (including unstable releases):
```sh ```sh
export K8S_VERSION=$(curl -sS https://storage.googleapis.com/kubernetes-release/release/latest.txt) export K8S_VERSION=$(curl -sS https://storage.googleapis.com/kubernetes-release/release/latest.txt)
``` ```
2. Start Hyperkube #### Step 2: Start Hyperkube
```shell ```shell
export ARCH=amd64 export ARCH=amd64
docker run -d \ docker run -d \
--volume=/sys:/sys:rw \ --volume=/sys:/sys:rw \
--volume=/var/lib/docker/:/var/lib/docker:rw \ --volume=/var/lib/docker/:/var/lib/docker:rw \
--volume=/var/lib/kubelet/:/var/lib/kubelet:rw,shared \ --volume=/var/lib/kubelet/:/var/lib/kubelet:rw,shared \
--volume=/var/run:/var/run:rw \ --volume=/var/run:/var/run:rw \
--net=host \ --net=host \
--pid=host \ --pid=host \
--privileged \ --privileged \
--name=kubelet \ --name=kubelet \
gcr.io/google_containers/hyperkube-${ARCH}:${K8S_VERSION} \ gcr.io/google_containers/hyperkube-${ARCH}:${K8S_VERSION} \
/hyperkube kubelet \ /hyperkube kubelet \
--hostname-override=127.0.0.1 \ --hostname-override=127.0.0.1 \
--api-servers=http://localhost:8080 \ --api-servers=http://localhost:8080 \
--config=/etc/kubernetes/manifests \ --config=/etc/kubernetes/manifests \
--cluster-dns=10.0.0.10 \ --cluster-dns=10.0.0.10 \
--cluster-domain=cluster.local \ --cluster-domain=cluster.local \
--allow-privileged --v=2 --allow-privileged --v=2
``` ```
> Note that `--cluster-dns` and `--cluster-domain` is used to deploy dns, feel free to discard them if dns is not needed. > Note that `--cluster-dns` and `--cluster-domain` is used to deploy dns, feel free to discard them if dns is not needed.
> If you would like to mount an external device as a volume, add `--volume=/dev:/dev` to the command above. It may however, cause some problems described in [#18230](https://github.com/kubernetes/kubernetes/issues/18230) > If you would like to mount an external device as a volume, add `--volume=/dev:/dev` to the command above. It may however, cause some problems described in [#18230](https://github.com/kubernetes/kubernetes/issues/18230)
> Architectures other than `amd64` are experimental and sometimes unstable, but feel free to try them out! Valid values: `arm`, `arm64` and `ppc64le`. ARM is available with Kubernetes version `v1.3.0-alpha.2` and higher. ARM 64-bit and PowerPC 64 little-endian are available with `v1.3.0-alpha.3` and higher. Track progress on multi-arch support [here](https://github.com/kubernetes/kubernetes/issues/17981) > Architectures other than `amd64` are experimental and sometimes unstable, but feel free to try them out! Valid values: `arm`, `arm64` and `ppc64le`. ARM is available with Kubernetes version `v1.3.0-alpha.2` and higher. ARM 64-bit and PowerPC 64 little-endian are available with `v1.3.0-alpha.3` and higher. Track progress on multi-arch support [here](https://github.com/kubernetes/kubernetes/issues/17981)
> If you are behind a proxy, you need to pass the proxy setup to curl in the containers to pull the certificates. Create a .curlrc under /root folder (because the containers are running as root) with the following line: > If you are behind a proxy, you need to pass the proxy setup to curl in the containers to pull the certificates. Create a .curlrc under /root folder (because the containers are running as root) with the following line:
``` ```
proxy = <your_proxy_server>:<port> proxy = <your_proxy_server>:<port>
``` ```
This actually runs the kubelet, which in turn runs a [pod](/docs/user-guide/pods/) that contains the other master components. This actually runs the kubelet, which in turn runs a [pod](/docs/user-guide/pods/) that contains the other master components.
**SECURITY WARNING**: Services exposed via Kubernetes using Hyperkube are available on the host node's public network interface / IP address. Because of this, this guide is not suitable for any host node/server that is directly internet accessible. Refer to [#21735](https://github.com/kubernetes/kubernetes/issues/21735) for addtional info.
** **SECURITY WARNING** ** services exposed via Kubernetes using Hyperkube are available on the host node's public network interface / IP address. Because of this, this guide is not suitable for any host node/server that is directly internet accessible. Refer to [#21735](https://github.com/kubernetes/kubernetes/issues/21735) for addtional info.
### Download `kubectl` ### Download `kubectl`