Merge pull request #26951 from madhusudancs/fed-detect-project-registry-base

Automatic merge from submit-queue

Detect the project in which the federation of clusters are being created and point the federation docker registry to that project.

Only the last commit here needs review.

Depends on #26950.

cc @colhom @kubernetes/sig-cluster-federation

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federation/cluster/common.sh

@@ -24,6 +24,27 @@
 
 : "${KUBE_ROOT?Must set KUBE_ROOT env var}"
 
+# Provides the $KUBERNETES_PROVIDER variable and detect-project function
+source "${KUBE_ROOT}/cluster/kube-util.sh"
+
+# If $FEDERATION_PUSH_REPO_BASE isn't set, then set the GCR registry name
+# based on the detected project name for gce and gke providers.
+FEDERATION_PUSH_REPO_BASE=${FEDERATION_PUSH_REPO_BASE:-}
+if [[ -z "${FEDERATION_PUSH_REPO_BASE}" ]]; then
+    if [[ "${KUBERNETES_PROVIDER}" == "gke" || "${KUBERNETES_PROVIDER}" == "gce" ]]; then
+        # Populates $PROJECT
+        detect-project
+        if [[ ${PROJECT} == *':'* ]]; then
+            echo "${PROJECT} contains ':' and can not be used as FEDERATION_PUSH_REPO_BASE. Please set FEDERATION_PUSH_REPO_BASE explicitly."
+            exit 1
+        fi
+        FEDERATION_PUSH_REPO_BASE=gcr.io/${PROJECT}
+    else
+        echo "Must set FEDERATION_PUSH_REPO_BASE env var"
+        exit 1
+    fi
+fi
+
 FEDERATION_IMAGE_REPO_BASE=${FEDERATION_IMAGE_REPO_BASE:-'gcr.io/google_containers'}
 FEDERATION_NAMESPACE=${FEDERATION_NAMESPACE:-federation-e2e}