Change etcd's --listen-client-urls to 0.0.0.0 in tests

This is to allow scraping etcd metrics in scalability tests.

Ref. https://github.com/kubernetes/perf-tests/issues/522

cluster/gce/config-test.sh

@@ -523,3 +523,5 @@ WINDOWS_NODE_TAINTS="${WINDOWS_NODE_TAINTS:-node.kubernetes.io/os=win1809:NoSche
 
 # Whether to set up a private GCE cluster, i.e. a cluster where nodes have only private IPs.
 GCE_PRIVATE_CLUSTER="${KUBE_GCE_PRIVATE_CLUSTER:-false}"
+
+ETCD_LISTEN_CLIENT_IP=0.0.0.0

cluster/gce/gci/configure-helper.sh

@@ -1405,6 +1405,7 @@ function prepare-etcd-manifest {
   sed -i -e "s@{{ *host_ip *}}@$host_ip@g" "${temp_file}"
   sed -i -e "s@{{ *etcd_cluster *}}@$etcd_cluster@g" "${temp_file}"
   sed -i -e "s@{{ *liveness_probe_initial_delay *}}@${ETCD_LIVENESS_PROBE_INITIAL_DELAY_SEC:-15}@g" "${temp_file}"
+  sed -i -e "s@{{ *listen_client_ip *}}@${ETCD_LISTEN_CLIENT_IP:-127.0.0.1}@g" "${temp_file}"
   # Get default storage backend from manifest file.
   local -r default_storage_backend=$(cat "${temp_file}" | \
     grep -o "{{ *pillar\.get('storage_backend', '\(.*\)') *}}" | \

cluster/gce/manifests/etcd.manifest

@@ -23,7 +23,7 @@
     "command": [
               "/bin/sh",
               "-c",
-              "if [ -e /usr/local/bin/migrate-if-needed.sh ]; then /usr/local/bin/migrate-if-needed.sh 1>>/var/log/etcd{{ suffix }}.log 2>&1; fi; exec /usr/local/bin/etcd --name etcd-{{ hostname }} --listen-peer-urls {{ etcd_protocol }}://{{ host_ip }}:{{ server_port }} --initial-advertise-peer-urls {{ etcd_protocol }}://{{ hostname }}:{{ server_port }} --advertise-client-urls http://127.0.0.1:{{ port }} --listen-client-urls http://127.0.0.1:{{ port }} {{ quota_bytes }} --data-dir /var/etcd/data{{ suffix }} --initial-cluster-state {{ cluster_state }} --initial-cluster {{ etcd_cluster }} {{ etcd_creds }} {{ etcd_apiserver_creds }} {{ etcd_extra_args }} 1>>/var/log/etcd{{ suffix }}.log 2>&1"
+              "if [ -e /usr/local/bin/migrate-if-needed.sh ]; then /usr/local/bin/migrate-if-needed.sh 1>>/var/log/etcd{{ suffix }}.log 2>&1; fi; exec /usr/local/bin/etcd --name etcd-{{ hostname }} --listen-peer-urls {{ etcd_protocol }}://{{ host_ip }}:{{ server_port }} --initial-advertise-peer-urls {{ etcd_protocol }}://{{ hostname }}:{{ server_port }} --advertise-client-urls http://127.0.0.1:{{ port }} --listen-client-urls http://{{ listen_client_ip }}:{{ port }} {{ quota_bytes }} --data-dir /var/etcd/data{{ suffix }} --initial-cluster-state {{ cluster_state }} --initial-cluster {{ etcd_cluster }} {{ etcd_creds }} {{ etcd_apiserver_creds }} {{ etcd_extra_args }} 1>>/var/log/etcd{{ suffix }}.log 2>&1"
             ],
     "env": [
       { "name": "TARGET_STORAGE",

cluster/gce/util.sh

@@ -1405,6 +1405,11 @@ EOF
     if [ -n "${API_SERVER_TEST_LOG_LEVEL:-}" ]; then
       cat >>$file <<EOF
 API_SERVER_TEST_LOG_LEVEL: $(yaml-quote ${API_SERVER_TEST_LOG_LEVEL})
+EOF
+    fi
+    if [ -n "${ETCD_LISTEN_CLIENT_IP:-}" ]; then
+      cat >>$file <<EOF
+ETCD_LISTEN_CLIENT_IP: $(yaml-quote ${ETCD_LISTEN_CLIENT_IP})
 EOF
     fi