[Federation] Create a script that dumps Federation pod logs after Federation e2e tests

federation/cluster/log-dump.sh

+#!/bin/bash
+
+# Copyright 2017 The Kubernetes Authors.
+#
+# 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.
+
+# Call this to dump all Federation pod logs into the folder specified in $1
+# (defaults to _artifacts).
+
+set -o errexit
+set -o nounset
+set -o pipefail
+
+# For FEDERATION_NAMESPACE
+KUBE_ROOT=$(dirname "${BASH_SOURCE}")/../..
+source "${KUBE_ROOT}/federation/cluster/common.sh"
+
+readonly REPORT_DIR="${1:-_artifacts}"
+OUTPUT_DIR="${REPORT_DIR}/federation"
+
+# Dumps logs for all pods in a federation.
+function dump_federation_pod_logs() {
+  local -r federation_pod_names=($(kubectl get pods -l 'app=federated-cluster' --namespace=${FEDERATION_NAMESPACE} -o name))
+  for pod_name in ${federation_pod_names[@]}; do
+    # The API server pod has two containers
+    if [[ "${pod_name}" == *apiserver* ]]; then
+      dump_apiserver_pod_logs "${pod_name}"
+      continue
+    fi
+
+    kubectl logs "${pod_name}" --namespace="${FEDERATION_NAMESPACE}" \
+        >"${OUTPUT_DIR}/${pod_name#pod/}.log"
+  done
+}
+
+# Dumps logs from all containers in an API server pod.
+# Arguments:
+# - the name of the API server pod, with a pod/ prefix.
+function dump_apiserver_pod_logs() {
+  local -r apiserver_pod_containers=(apiserver etcd)
+  for container in ${apiserver_pod_containers[@]}; do
+    kubectl logs "${1}" -c "${container}" --namespace="${FEDERATION_NAMESPACE}" \
+        >"${OUTPUT_DIR}/${1#pod/}-${container}.log"
+  done
+}
+
+# Dumps logs from all containers in the DNS pods.
+# TODO: This currently only grabs DNS pod logs from the host cluster. It should
+# grab those logs from all clusters in the federation.
+function dump_dns_pod_logs() {
+  local -r dns_pod_names=($(kubectl get pods -l 'k8s-app=kube-dns' --namespace=kube-system -o name))
+  local -r dns_pod_containers=(kubedns dnsmasq sidecar)
+
+  for pod_name in ${dns_pod_names[@]}; do
+    # As of 3/2017, the only pod that matches the kube-dns label is kube-dns, and
+    # it has three containers.
+    for container in ${dns_pod_containers[@]}; do
+      kubectl logs "${pod_name}" -c "${container}" --namespace=kube-system \
+          >"${OUTPUT_DIR}/${pod_name#pod/}-${container}.log"
+    done
+  done
+}
+
+
+echo "Dumping Federation and DNS pod logs to ${REPORT_DIR}"
+mkdir -p "${OUTPUT_DIR}"
+
+dump_federation_pod_logs
+dump_dns_pod_logs

test/e2e_federation/framework/framework.go

@@ -25,9 +25,7 @@ import (
 	apierrors "k8s.io/apimachinery/pkg/api/errors"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"k8s.io/apimachinery/pkg/util/wait"
-	fedv1beta1 "k8s.io/kubernetes/federation/apis/federation/v1beta1"
 	"k8s.io/kubernetes/federation/client/clientset_generated/federation_clientset"
-	"k8s.io/kubernetes/pkg/api"
 	"k8s.io/kubernetes/pkg/api/v1"
 	"k8s.io/kubernetes/test/e2e/framework"
 
@@ -157,10 +155,6 @@ func (f *Framework) FederationAfterEach() {
 		framework.DumpEventsInNamespace(func(opts metav1.ListOptions, ns string) (*v1.EventList, error) {
 			return f.FederationClientset.Core().Events(ns).List(opts)
 		}, f.FederationNamespace.Name)
-		// Print logs of federation control plane pods (federation-apiserver and federation-controller-manager)
-		framework.LogPodsWithLabels(f.ClientSet, fedv1beta1.FederationNamespaceSystem, map[string]string{"app": "federated-cluster"}, framework.Logf)
-		// Print logs of kube-dns pod
-		framework.LogPodsWithLabels(f.ClientSet, api.NamespaceSystem, map[string]string{"k8s-app": "kube-dns"}, framework.Logf)
 	}
 }