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Remove the numbered shell scripts from the live update example and the 

update.sh e2e test. They were needlessly obfuscating the actual kubectl
commands being run.
This commit is contained in:
Robert Bailey 2015-02-18 17:02:44 -08:00
parent 3095657f3e
commit b7a12d80ce
9 changed files with 25 additions and 201 deletions
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32
update-demo/1-run-web-proxy.sh
View File

@ -1,32 +0,0 @@
#!/bin/bash
# Copyright 2014 Google Inc. All rights reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
set -o errexit
set -o nounset
set -o pipefail
echo "Running local proxy to Kubernetes API Server. Run this in a "
echo "separate terminal or run it in the background."
echo
echo " http://localhost:8001/static/"
echo
export KUBE_ROOT=$(dirname $0)/../..
export KUBECTL=${KUBE_ROOT}/cluster/kubectl.sh
set -x
$KUBECTL proxy --www=local/

33
update-demo/2-create-replication-controller.sh
View File

@ -1,33 +0,0 @@
#!/bin/bash
# Copyright 2014 Google Inc. All rights reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
set -o errexit
set -o nounset
set -o pipefail
if [[ "${DOCKER_HUB_USER+set}" != "set" ]] ; then
echo "Please set DOCKER_HUB_USER to your Docker hub account"
exit 1
fi
export KUBE_ROOT=${KUBE_ROOT-$(dirname $0)/../..}
export KUBECTL=${KUBE_ROOT}/cluster/kubectl.sh
set -x
SCHEMA=${KUBE_ROOT}/examples/update-demo/nautilus-rc.yaml
cat ${SCHEMA} | sed "s/DOCKER_HUB_USER/${DOCKER_HUB_USER}/" | ${KUBECTL} create -f -

28
update-demo/3-scale.sh
View File

@ -1,28 +0,0 @@
#!/bin/bash
# Copyright 2014 Google Inc. All rights reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
set -o errexit
set -o nounset
set -o pipefail
NEW_SIZE=${1:-4}
export KUBE_ROOT=${KUBE_ROOT-$(dirname $0)/../..}
export KUBECTL=${KUBECTL-$KUBE_ROOT/cluster/kubectl.sh}
set -x
$KUBECTL resize rc update-demo-nautilus --replicas=$NEW_SIZE

35
update-demo/4-rolling-update.sh
View File

@ -1,35 +0,0 @@
#!/bin/bash
# Copyright 2014 Google Inc. All rights reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
set -o errexit
set -o nounset
set -o pipefail
if [[ "${DOCKER_HUB_USER+set}" != "set" ]] ; then
echo "Please set DOCKER_HUB_USER to your Docker hub account"
exit 1
fi
export KUBE_ROOT=$(dirname $0)/../..
export KUBECTL=${KUBE_ROOT}/cluster/kubectl.sh
set -x
NEW_IMAGE=${1:-kitten}
TIMING=${2:-10s}
SCHEMA=${KUBE_ROOT}/examples/update-demo/kitten-rc.yaml
cat ${SCHEMA} | sed "s/DOCKER_HUB_USER/${DOCKER_HUB_USER}/" | ${KUBECTL} rollingupdate update-demo-nautilus -f - --update-period=10s

32
update-demo/5-down.sh
View File

@ -1,32 +0,0 @@
#!/bin/bash
# Copyright 2014 Google Inc. All rights reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
set -o errexit
set -o nounset
set -o pipefail
export KUBE_ROOT=$(dirname $0)/../..
export KUBECTL=${KUBE_ROOT}/cluster/kubectl.sh
set -x
rc="update-demo-kitten"
echo "Stopping replicationController ${rc}"
$KUBECTL stop rc ${rc} || true
rc="update-demo-nautilus"
echo "Stopping replicationController ${rc}"
$KUBECTL stop rc ${rc} || true

57
update-demo/README.md
View File

@ -26,14 +26,7 @@ $ cd kubernetes
$ hack/dev-build-and-up.sh
```
This example also assumes that you have [Docker](http://docker.io) installed on your local machine.
It also assumes that `$DOCKER_HUB_USER` is set to your Docker user id. We use this to upload the docker images that are used in the demo.
```bash
$ export DOCKER_HUB_USER=my-docker-id
```
You may need to open the firewall for port 8080 using the [console][cloud-console] or the `gcloud` tool. The following command will allow traffic from any source to instances tagged `kubernetes-minion`:
If you are running your cluster on GCE (the default), you may need to open the firewall for port 8080 using the [console](https://console.developer.google.com) or the `gcloud` tool. The following command will allow traffic from any source to instances tagged `kubernetes-minion`:
```bash
$ gcloud compute firewall-rules create \
@ -41,28 +34,14 @@ $ gcloud compute firewall-rules create \
kubernetes-minion-8080
```
### Step Zero: Build the Docker images
This can take a few minutes to download/upload stuff.
```bash
$ cd examples/update-demo
$ ./0-build-images.sh
```
### Step One: Turn up the UX for the demo
You can use bash job control to run this in the background. This can sometimes spew to the output so you could also run it in a different terminal.
```
$ ./1-run-web-proxy.sh &
Running local proxy to Kubernetes API Server. Run this in a
separate terminal or run it in the background.
http://localhost:8001/static/
+ ../../cluster/kubectl.sh proxy --www=local/
I0115 16:50:15.959551 19790 proxy.go:34] Starting to serve on localhost:8001
$ ./cluster/kubectl.sh proxy --www=local/ &
+ ./cluster/kubectl.sh proxy --www=local/
I0218 15:18:31.623279 67480 proxy.go:36] Starting to serve on localhost:8001
```
Now visit the the [demo website](http://localhost:8001/static). You won't see anything much quite yet.
@ -71,7 +50,7 @@ Now visit the the [demo website](http://localhost:8001/static). You won't see a
Now we will turn up two replicas of an image. They all serve on port 8080, mapped to internal port 80
```bash
$ ./2-create-replication-controller.sh
$ ./cluster/kubectl.sh create -f examples/update-demo/nautilus-rc.yaml
```
After pulling the image from the Docker Hub to your worker nodes (which may take a minute or so) you'll see a couple of squares in the UI detailing the pods that are running along with the image that they are serving up. A cute little nautilus.
@ -81,7 +60,7 @@ After pulling the image from the Docker Hub to your worker nodes (which may take
Now we will increase the number of replicas from two to four:
```bash
$ ./3-scale.sh
$ ./cluster/kubectl.sh resize rc update-demo-nautilus --replicas=4
```
If you go back to the [demo website](http://localhost:8001/static/index.html) you should eventually see four boxes, one for each pod.
@ -90,11 +69,11 @@ If you go back to the [demo website](http://localhost:8001/static/index.html) yo
We will now update the docker image to serve a different image by doing a rolling update to a new Docker image.
```bash
$ ./4-rolling-update.sh
$ ./cluster/kubectl.sh rollingupdate update-demo-nautilus --update-period=10s -f examples/update-demo/kitten-rc.yaml
```
The rollingUpdate command in kubectl will do 2 things:
The rollingupdate command in kubectl will do 2 things:
1. Create a new replication controller with a pod template that uses the new image (`$DOCKER_HUB_USER/update-demo:kitten`)
1. Create a new replication controller with a pod template that uses the new image (`kubernetes/update-demo:kitten`)
2. Resize the old and new replication controllers until the new controller replaces the old. This will kill the current pods one at a time, spinnning up new ones to replace them.
Watch the [demo website](http://localhost:8001/static/index.html), it will update one pod every 10 seconds until all of the pods have the new image.
@ -102,13 +81,11 @@ Watch the [demo website](http://localhost:8001/static/index.html), it will updat
### Step Five: Bring down the pods
```bash
$ ./5-down.sh
$ ./cluster/kubectl.sh stop rc update-demo-kitten
```
This will first 'stop' the replication controller by turning the target number of replicas to 0. It'll then delete that controller.
[cloud-console]: https://console.developer.google.com
### Step Six: Cleanup
To turn down a Kubernetes cluster:
@ -123,11 +100,21 @@ After you are done running this demo make sure to kill it:
```bash
$ jobs
[1]+ Running ./1-run-web-proxy.sh &
[1]+ Running ./cluster/kubectl.sh proxy --www=local/ &
$ kill %1
[1]+ Terminated: 15 ./1-run-web-proxy.sh
[1]+ Terminated: 15 ./cluster/kubectl.sh proxy --www=local/
```
### Updating the Docker images
If you want to build your own docker images, you can set `$DOCKER_HUB_USER` to your Docker user id and run the included shell script. It can take a few minutes to download/upload stuff.
```bash
$ export DOCKER_HUB_USER=my-docker-id
$ ./examples/update-demo/build-images.sh
```
To use your custom docker image in the above examples, you will need to change the image name in `examples/update-demo/nautilus-rc.yaml` and `examples/update-demo/kitten-rc.yaml`.
### Image Copyright

5
update-demo/0-build-images.sh → update-demo/build-images.sh
View File

@ -20,10 +20,7 @@ set -o errexit
set -o nounset
set -o pipefail
if [[ "${DOCKER_HUB_USER+set}" != "set" ]] ; then
echo "Please set DOCKER_HUB_USER to your Docker hub account"
exit 1
fi
DOCKER_HUB_USER=${DOCKER_HUB_USER:-kubernetes}
set -x

2
update-demo/kitten-rc.yaml
View File

@ -10,7 +10,7 @@ desiredState:
manifest:
containers:
- name: update-demo
image: DOCKER_HUB_USER/update-demo:kitten
image: kubernetes/update-demo:kitten
ports:
- hostPort: 8080
containerPort: 80

2
update-demo/nautilus-rc.yaml
View File

@ -11,7 +11,7 @@ desiredState:
manifest:
containers:
- name: update-demo
image: DOCKER_HUB_USER/update-demo:nautilus
image: kubernetes/update-demo:nautilus
ports:
- hostPort: 8080
containerPort: 80