whentimeslows/website
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Merge branch 'master' into patch-7

Browse Source
This commit is contained in:
Wang Jie
2017-03-01 09:53:37 +08:00
committed by GitHub
parent dd595ae05b 04f2e50caa
commit fd9ff4c4e0
83 changed files with 1775 additions and 1364 deletions
Download Patch File Download Diff File Expand all files Collapse all files
docs/admin/static-pods.md
+12 -11
View File
@@ -26,7 +26,7 @@ For example, this is how to start a simple web server as a static pod:
[joe@host ~] $ ssh my-node1
```
2. Choose a directory, say `/etc/kubelet.d` and place a web server pod definition there, e.g. `/etc/kubernetes.d/static-web.yaml`:
2. Choose a directory, say `/etc/kubelet.d` and place a web server pod definition there, e.g. `/etc/kubelet.d/static-web.yaml`:
```
[root@my-node1 ~] $ mkdir /etc/kubernetes.d/
@@ -51,7 +51,7 @@ For example, this is how to start a simple web server as a static pod:
3. Configure your kubelet daemon on the node to use this directory by running it with `--pod-manifest-path=/etc/kubelet.d/` argument.
On Fedora edit `/etc/kubernetes/kubelet` to include this line:
```conf
```
KUBELET_ARGS="--cluster-dns=10.254.0.10 --cluster-domain=kube.local --pod-manifest-path=/etc/kubelet.d/"
```
@@ -73,8 +73,8 @@ When kubelet starts, it automatically starts all pods defined in directory speci
```shell
[joe@my-node1 ~] $ docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS NAMES
f6d05272b57e nginx:latest "nginx" 8 minutes ago Up 8 minutes k8s_web.6f802af4_static-web-fk-node1_default_67e24ed9466ba55986d120c867395f3c_378e5f3c
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
f6d05272b57e nginx:latest "nginx" 8 minutes ago Up 8 minutes k8s_web.6f802af4_static-web-fk-node1_default_67e24ed9466ba55986d120c867395f3c_378e5f3c
```
If we look at our Kubernetes API server (running on host `my-master`), we see that a new mirror-pod was created there too:
@@ -82,9 +82,9 @@ If we look at our Kubernetes API server (running on host `my-master`), we see th
```shell
[joe@host ~] $ ssh my-master
[joe@my-master ~] $ kubectl get pods
POD IP CONTAINER(S) IMAGE(S) HOST LABELS STATUS CREATED MESSAGE
static-web-my-node1 172.17.0.3 my-node1/192.168.100.71 role=myrole Running 11 minutes
web nginx Running 11 minutes
NAME READY STATUS RESTARTS AGE
static-web-my-node1 1/1 Running 0 2m
```
Labels from the static pod are propagated into the mirror-pod and can be used as usual for filtering.
@@ -95,8 +95,9 @@ Notice we cannot delete the pod with the API server (e.g. via [`kubectl`](/docs/
[joe@my-master ~] $ kubectl delete pod static-web-my-node1
pods/static-web-my-node1
[joe@my-master ~] $ kubectl get pods
POD IP CONTAINER(S) IMAGE(S) HOST ...
static-web-my-node1 172.17.0.3 my-node1/192.168.100.71 ...
NAME READY STATUS RESTARTS AGE
static-web-my-node1 1/1 Running 0 12s
```
Back to our `my-node1` host, we can try to stop the container manually and see, that kubelet automatically restarts it in a while:
@@ -115,11 +116,11 @@ CONTAINER ID IMAGE COMMAND CREATED ...
Running kubelet periodically scans the configured directory (`/etc/kubelet.d` in our example) for changes and adds/removes pods as files appear/disappear in this directory.
```shell
[joe@my-node1 ~] $ mv /etc/kubernetes.d/static-web.yaml /tmp
[joe@my-node1 ~] $ mv /etc/kubelet.d/static-web.yaml /tmp
[joe@my-node1 ~] $ sleep 20
[joe@my-node1 ~] $ docker ps
// no nginx container is running
[joe@my-node1 ~] $ mv /tmp/static-web.yaml /etc/kubernetes.d/
[joe@my-node1 ~] $ mv /tmp/static-web.yaml /etc/kubelet.d/
[joe@my-node1 ~] $ sleep 20
[joe@my-node1 ~] $ docker ps
CONTAINER ID IMAGE COMMAND CREATED ...