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Merge pull request #3360 from zmerlynn/jenkins_scripts_start

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Initial commit of Jenkins script + README
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Dawn Chen 2015-01-12 09:22:39 -08:00
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# Jenkins
[Jenkins](http://jenkins-ci.org/) is a pluggable continuous
integration system. The Google team is running a Jenkins server on a
private GCE instance for the Kubernetes project in order to run longer
integration tests, continuously, on different providers. Currently, we
(Google) are only running Jenkins on our own providers (GCE and GKE)
in different flavors.
## General flow
The flow of the Google Jenkins server:
* Under the `kubernetes-build` job: Every 5 minutes, Jenkins polls for a batch of new commits, after which it runs the `build.sh` script (in this directory) on the latest tip. This results in build assets getting pushed to GCS and the `latest.txt` file in the `ci` bucket being updated. That job then triggers `kubernetes-e2e-*`.
* On trigger, and every half hour (which effectively means all the time, unless we're failing cluster creation), e2e variants run, on the latest build assets in GCS:
* `kubernetes-e2e-gce`: Standard GCE e2e
* `kubernetes-e2e-gke`: GKE provider e2e, with head k8s client and GKE creating clusters at its default version
* `kubernetes-e2e-gke-ci`: GKE provider e2e, with head k8s client and GKE creating clusters at the head k8s version
* Each job will not run concurrently with itself, so, for instance,
Jenkins executor will only ever run one `kubernetes-build`
job. However, it may run the jobs in parallel,
i.e. `kubernetes-build` may be run at the same time as
`kubernetes-e2e-gce`. For this reason, you may see your changes
pushed to our GCS bucket rapidly, but they may take some time to
fully work through Jenkins. Or you may get lucky and catch the
train in 5 minutes.
## Scripts
The scripts in this directory are directly used by Jenkins, either by
curl from githubusercontent (if we don't have a git checkout handy) or
by executing it from the git checkout. Since Jenkins is an entity
outside this repository, it's tricky to keep documentation for it up
to date quickly. However, the scripts themselves attempt to provide
color for the configuration(s) that each script runs in.

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#!/bin/bash
# Copyright 2015 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.
# kubernetes-build job: Triggered by github checkins on a 5 minute
# poll. We abort this job if it takes longer than 10m. (Typically this
# job takes about ~5m as of 0.8.0, but it's actually not completely
# hermetic right now due to things like the golang image. It can take
# ~8m if you force it to be totally hermetic.)
set -o errexit
set -o nounset
set -o pipefail
set -o xtrace
# !!! ALERT !!! Jenkins default $HOME is /var/lib/jenkins, which is
# global across jobs. We change $HOME instead to ${WORKSPACE}, which
# is an incoming variable Jenkins provides us for this job's scratch
# space.
export HOME=${WORKSPACE} # Nothing should want Jenkins $HOME
export PATH=$PATH:/usr/local/go/bin
export KUBE_RELEASE_RUN_TESTS=n
export KUBE_SKIP_CONFIRMATIONS=y
# Clean stuff out.
#
# TODO: Look at git clean plugin again for hermeticism, but may not
# play nicely with dockerized stuff and permissions. (We may just need
# to force the build/make-clean.sh at the end of the build regardless
# of status and be delicate with the exit status.) (Low priority
# unless there's a hermetic issue.)
rm -rf ~/.kube*
./build/make-clean.sh
git clean -fdx
# Build
go run ./hack/e2e.go -v -build
# Push to GCS
yes | ./build/push-ci-build.sh
sha256sum _output/release-tars/kubernetes*.tar.gz