Add update_job_result_cache() to uploader for storing last 200 result…

…s in a single file.

hack/jenkins/upload-to-gcs.sh

@@ -63,21 +63,27 @@ readonly gcs_acl="public-read"
 readonly results_url=${gcs_build_path//"gs:/"/"https://console.cloud.google.com/storage/browser"}
 readonly timestamp=$(date +%s)
 
-function upload_version() {
- echo -n 'Run starting at '; date -d "@${timestamp}"
-
- # Try to discover the kubernetes version.
- local version=""
+#########################################################################
+# Try to discover the kubernetes version.
+# prints version
+function find_version() {
  if [[ -e "version" ]]; then
- version=$(cat "version")
+ cat version
  elif [[ -e "hack/lib/version.sh" ]]; then
- version=$(
-  export KUBE_ROOT="."
-  source "hack/lib/version.sh"
-  kube::version::get_version_vars
-  echo "${KUBE_GIT_VERSION-}"
+ (
+ export KUBE_ROOT="."
+ source "hack/lib/version.sh"
+ kube::version::get_version_vars
+ echo "${KUBE_GIT_VERSION-}"
  )
  fi
+}
+
+function upload_version() {
+ local -r version=$(find_version)
+ local upload_attempt
+
+ echo -n 'Run starting at '; date -d "@${timestamp}"
 
  if [[ -n "${version}" ]]; then
  echo "Found Kubernetes version: ${version}"
@@ -99,8 +105,52 @@ function upload_version() {
  done
 }
 
+#########################################################################
+# Maintain a single file storing the full build version, Jenkins' job number
+# build state. Limit its size so it does not grow unbounded.
+# This is primarily used for and by the
+# github.com/kubernetes/release/find_green_build tool.
+# @param build_result - the state of the build
+#
+function update_job_result_cache() {
+ local -r build_result=$1
+ local -r version=$(find_version)
+ local -r job_results=${gcs_job_path}/jobResultsCache.json
+ local -r tmp_results="${WORKSPACE}/_tmp/jobResultsCache.tmp"
+ local -r cache_size=200
+ local upload_attempt
+
+ if [[ -n "${version}" ]]; then
+ echo "Found Kubernetes version: ${version}"
+ else
+ echo "Could not find Kubernetes version"
+ fi
+
+ mkdir -p ${tmp_results%/*}
+
+ for upload_attempt in $(seq 3); do
+ echo "Copying ${job_results} to ${tmp_results} (attempt ${upload_attempt})"
+ gsutil -q cp ${job_results} ${tmp_results} 2>&- || continue
+ break
+ done
+
+ echo "{\"version\": \"${version}\", \"buildnumber\": \"${BUILD_NUMBER}\"," \
+ "\"result\": \"${build_result}\"}" >> ${tmp_results}
+
+ for upload_attempt in $(seq 3); do
+ echo "Copying ${tmp_results} to ${job_results} (attempt ${upload_attempt})"
+ gsutil -q -h "Content-Type:application/json" cp -a "${gcs_acl}" \
+ <(tail -${cache_size} ${tmp_results}) ${job_results} || continue
+ break
+ done
+
+ rm -f ${tmp_results}
+}
+
 function upload_artifacts_and_build_result() {
  local -r build_result=$1
+ local upload_attempt
+
  echo -n 'Run finished at '; date -d "@${timestamp}"
 
  for upload_attempt in $(seq 3); do
@@ -150,6 +200,7 @@ if [[ -n "${JENKINS_BUILD_STARTED:-}" ]]; then
  upload_version
 elif [[ -n "${JENKINS_BUILD_FINISHED:-}" ]]; then
  upload_artifacts_and_build_result ${JENKINS_BUILD_FINISHED}
+ update_job_result_cache ${JENKINS_BUILD_FINISHED}
 else
  echo "Called without JENKINS_BUILD_STARTED or JENKINS_BUILD_FINISHED set."
  echo "Assuming a legacy invocation."