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Merge branch 'master' into release-1.12

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zacharysarah
2018-10-17 19:10:16 -07:00
parent 01677e2710 548b538f72
commit 9a2e390e59
558 changed files with 71868 additions and 2594 deletions
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content/en/docs/setup/independent/install-kubeadm.md
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@@ -23,11 +23,11 @@ see the [Using kubeadm to Create a Cluster](/docs/setup/independent/create-clust
- HypriotOS v1.0.1+
- Container Linux (tested with 1800.6.0)
* 2 GB or more of RAM per machine (any less will leave little room for your apps)
* 2 CPUs or more
* 2 CPUs or more
* Full network connectivity between all machines in the cluster (public or private network is fine)
* Unique hostname, MAC address, and product_uuid for every node. See [here](#verify-the-mac-address-and-product-uuid-are-unique-for-every-node) for more details.
* Certain ports are open on your machines. See [here](#check-required-ports) for more details.
* Swap disabled. You **MUST** disable swap in order for the kubelet to work properly.
* Swap disabled. You **MUST** disable swap in order for the kubelet to work properly.
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@@ -87,12 +87,12 @@ The container runtime used by default is Docker, which is enabled through the bu
Other CRI-based runtimes include:
- [cri-containerd](https://github.com/containerd/cri-containerd)
- [containerd](https://github.com/containerd/cri) (CRI plugin built into containerd)
- [cri-o](https://github.com/kubernetes-incubator/cri-o)
- [frakti](https://github.com/kubernetes/frakti)
- [rkt](https://github.com/kubernetes-incubator/rktlet)
Refer to the [CRI installation instructions](/docs/setup/cri.md) for more information.
Refer to the [CRI installation instructions](/docs/setup/cri) for more information.
## Installing kubeadm, kubelet and kubectl
@@ -105,10 +105,10 @@ You will install these packages on all of your machines:
* `kubectl`: the command line util to talk to your cluster.
kubeadm **will not** install or manage `kubelet` or `kubectl` for you, so you will
need to ensure they match the version of the Kubernetes control panel you want
kubeadm **will not** install or manage `kubelet` or `kubectl` for you, so you will
need to ensure they match the version of the Kubernetes control panel you want
kubeadm to install for you. If you do not, there is a risk of a version skew occurring that
can lead to unexpected, buggy behaviour. However, _one_ minor version skew between the
can lead to unexpected, buggy behaviour. However, _one_ minor version skew between the
kubelet and the control plane is supported, but the kubelet version may never exceed the API
server version. For example, kubelets running 1.7.0 should be fully compatible with a 1.8.0 API server,
but not vice versa.
@@ -119,7 +119,7 @@ This is because kubeadm and Kubernetes require
[special attention to upgrade](/docs/tasks/administer-cluster/kubeadm/kubeadm-upgrade-1-11/).
{{</ warning >}}
For more information on version skews, please read our
For more information on version skews, please read our
[version skew policy](/docs/setup/independent/create-cluster-kubeadm/#version-skew-policy).
{{< tabs name="k8s_install" >}}
@@ -128,7 +128,7 @@ For more information on version skews, please read our
apt-get update && apt-get install -y apt-transport-https curl
curl -s https://packages.cloud.google.com/apt/doc/apt-key.gpg | apt-key add -
cat <<EOF >/etc/apt/sources.list.d/kubernetes.list
deb http://apt.kubernetes.io/ kubernetes-xenial main
deb https://apt.kubernetes.io/ kubernetes-xenial main
EOF
apt-get update
apt-get install -y kubelet kubeadm kubectl
@@ -147,18 +147,24 @@ repo_gpgcheck=1
gpgkey=https://packages.cloud.google.com/yum/doc/yum-key.gpg https://packages.cloud.google.com/yum/doc/rpm-package-key.gpg
exclude=kube*
EOF
# Set SELinux in permissive mode (effectively disabling it)
setenforce 0
sed -i 's/^SELINUX=enforcing$/SELINUX=permissive/' /etc/selinux/config
yum install -y kubelet kubeadm kubectl --disableexcludes=kubernetes
systemctl enable kubelet && systemctl start kubelet
```
**Note:**
- Disabling SELinux by running `setenforce 0` is required to allow containers to access the host filesystem, which is required by pod networks for example.
- Setting SELinux in permissive mode by running `setenforce 0` and `sed ...` effectively disables it.
This is required to allow containers to access the host filesystem, which is needed by pod networks for example.
You have to do this until SELinux support is improved in the kubelet.
- Some users on RHEL/CentOS 7 have reported issues with traffic being routed incorrectly due to iptables being bypassed. You should ensure
`net.bridge.bridge-nf-call-iptables` is set to 1 in your `sysctl` config, e.g.
```bash
cat <<EOF > /etc/sysctl.d/k8s.conf
net.bridge.bridge-nf-call-ip6tables = 1
@@ -244,8 +250,4 @@ If you are running into difficulties with kubeadm, please consult our [troublesh
* [Using kubeadm to Create a Cluster](/docs/setup/independent/create-cluster-kubeadm/)
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