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Merge pull request #2494 from bgrant0607/config
Create tool for resizing a replication controller via kubectl.
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commit
6b80abc78c
17
contrib/rctools/README.md
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contrib/rctools/README.md
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# Replication controller tools
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## resize.sh
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Resizes a replication controller to the specified number of pods.
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```
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$ resize.sh
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usage: resize.sh <replication controller name> <size>
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$ resize.sh redisslave 4
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```
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## stop.sh
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Resizes a replication controller to 0 pods and waits until the pods are deleted.
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```
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$ stop.sh
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usage: stop.sh <replication controller name>
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$ stop.sh redisslave
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```
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contrib/rctools/resize.sh
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contrib/rctools/resize.sh
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#!/bin/bash
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# Copyright 2014 Google Inc. All rights reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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# This command resizes a replication controller using kubectl.
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KUBE_ROOT=$(dirname "${BASH_SOURCE}")/../..
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KUBECTL="${KUBE_ROOT}/cluster/kubectl.sh"
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if [[ $# != 2 ]] ; then
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echo "usage: $0 <replication controller name> <size>" >&2
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exit 1
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fi
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rc="$1"
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size="$2"
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"${KUBECTL}" get -o json rc "$rc" | sed 's/"replicas": [0-9][0-9]*/"replicas": '"$size"'/' | "${KUBECTL}" update -f - rc "$rc"
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contrib/rctools/stop.sh
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contrib/rctools/stop.sh
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#!/bin/bash
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# Copyright 2014 Google Inc. All rights reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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# This command resizes a replication controller to 0.
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KUBE_ROOT=$(dirname "${BASH_SOURCE}")/../..
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KUBECTL="${KUBE_ROOT}/cluster/kubectl.sh"
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RESIZE="${KUBE_ROOT}/contrib/rctools/resize.sh"
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if [[ $# != 1 ]] ; then
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echo "usage: $0 <replication controller name>" >&2
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exit 1
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fi
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rc="$1"
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"${RESIZE}" "$rc" 0
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# kubectl describe output includes a line like:
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# Replicas: 2 current / 2 desired
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# Wait until it shows 0 pods
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while true; do
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pods=$(${KUBECTL} describe rc "$rc" | awk '/^Replicas:/{print $2}')
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if [[ "$pods" -eq 0 ]] ; then
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exit 0
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else
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echo "$pods remaining..."
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fi
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sleep 1
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done
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exit 1
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@ -402,8 +402,7 @@ func (p *TemplatePrinter) PrintObj(obj runtime.Object, w io.Writer) error {
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func tabbedString(f func(io.Writer) error) (string, error) {
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func tabbedString(f func(io.Writer) error) (string, error) {
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out := new(tabwriter.Writer)
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out := new(tabwriter.Writer)
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b := make([]byte, 1024)
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buf := &bytes.Buffer{}
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buf := bytes.NewBuffer(b)
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out.Init(buf, 0, 8, 1, '\t', 0)
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out.Init(buf, 0, 8, 1, '\t', 0)
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err := f(out)
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err := f(out)
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