Expose etcd version.

cluster/common.sh

@@ -702,6 +702,15 @@ NUM_NODES: $(yaml-quote ${NUM_NODES})
 STORAGE_BACKEND: $(yaml-quote ${STORAGE_BACKEND:-})
 ENABLE_GARBAGE_COLLECTOR: $(yaml-quote ${ENABLE_GARBAGE_COLLECTOR:-})
 EOF
+    # ETCD_IMAGE (if set) allows to use a custom etcd image.
+    if [ -n "${ETCD_IMAGE:-}" ]; then
+      cat >>$file <<EOF
+ETCD_IMAGE: $(yaml-quote ${ETCD_IMAGE})
+EOF
+    fi
+    # ETCD_VERSION (if set) allows you to use custom version of etcd.
+    # The main purpose of using it may be rollback of etcd v3 API,
+    # where we need 3.0.* image, but are rolling back to 2.3.7.
     if [ -n "${ETCD_VERSION:-}" ]; then
       cat >>$file <<EOF
 ETCD_VERSION: $(yaml-quote ${ETCD_VERSION})

cluster/gce/config-test.sh

@@ -94,7 +94,9 @@ ENABLE_L7_LOADBALANCING="${KUBE_ENABLE_L7_LOADBALANCING:-glbc}"
 #   standalone     - Heapster only. Metrics available via Heapster REST API.
 ENABLE_CLUSTER_MONITORING="${KUBE_ENABLE_CLUSTER_MONITORING:-influxdb}"
 
-# Set etcd version (e.g. 3.0.4-migration.1) if you need non-default version.
+# Set etcd image (e.g. 3.0.13-experimental.1) version (e.g. 3.0.13) if you need
+# non-default version.
+ETCD_IMAGE="${TEST_ETCD_IMAGE:-}"
 ETCD_VERSION="${TEST_ETCD_VERSION:-}"
 
 # Default Log level for all components in test clusters and variables to override it in specific components.

cluster/gce/configure-vm.sh

@@ -470,12 +470,17 @@ EOF
 kubelet_port: '$(echo "$KUBELET_PORT" | sed -e "s/'/''/g")'
 EOF
     fi
-    # Configuration changes for test clusters
+    if [ -n "${ETCD_IMAGE:-}" ]; then
+      cat <<EOF >>/srv/salt-overlay/pillar/cluster-params.sls
+etcd_docker_tag: '$(echo "$ETCD_IMAGE" | sed -e "s/'/''/g")'
+EOF
+    fi
     if [ -n "${ETCD_VERSION:-}" ]; then
       cat <<EOF >>/srv/salt-overlay/pillar/cluster-params.sls
-etcd_docker_tag: '$(echo "$ETCD_VERSION" | sed -e "s/'/''/g")'
+etcd_version: '$(echo "$ETCD_VERSION" | sed -e "s/'/''/g")'
 EOF
     fi
+    # Configuration changes for test clusters
     if [ -n "${APISERVER_TEST_ARGS:-}" ]; then
       cat <<EOF >>/srv/salt-overlay/pillar/cluster-params.sls
 apiserver_test_args: '$(echo "$APISERVER_TEST_ARGS" | sed -e "s/'/''/g")'

cluster/gce/gci/configure-helper.sh

@@ -626,11 +626,16 @@ function prepare-etcd-manifest {
   sed -i -e "s@{{ *etcd_cluster *}}@$etcd_cluster@g" "${temp_file}"
   sed -i -e "s@{{ *storage_backend *}}@${STORAGE_BACKEND:-}@g" "${temp_file}"
   sed -i -e "s@{{ *cluster_state *}}@$cluster_state@g" "${temp_file}"
-  if [[ -n "${ETCD_VERSION:-}" ]]; then
-    sed -i -e "s@{{ *pillar\.get('etcd_docker_tag', '\(.*\)') *}}@${ETCD_VERSION}@g" "${temp_file}"
+  if [[ -n "${ETCD_IMAGE:-}" ]]; then
+    sed -i -e "s@{{ *pillar\.get('etcd_docker_tag', '\(.*\)') *}}@${ETCD_IMAGE}@g" "${temp_file}"
   else
     sed -i -e "s@{{ *pillar\.get('etcd_docker_tag', '\(.*\)') *}}@\1@g" "${temp_file}"
   fi
+  if [[ -n "${ETCD_VERSION:-}" ]]; then
+    sed -i -e "s@{{ *pillar\.get('etcd_version', '\(.*\)') *}}@${ETCD_VERSION}@g" "${temp_file}"
+  else
+    sed -i -e "s@{{ *pillar\.get('etcd_version', '\(.*\)') *}}@\1@g" "${temp_file}"
+  fi
   # Replace the volume host path.
   sed -i -e "s@/mnt/master-pd/var/etcd@/mnt/disks/master-pd/var/etcd@g" "${temp_file}"
   mv "${temp_file}" /etc/kubernetes/manifests

cluster/gce/trusty/configure-helper.sh

@@ -458,11 +458,16 @@ prepare_etcd_manifest() {
   sed -i -e "s@{{ *etcd_cluster *}}@$etcd_cluster@g" "${etcd_temp_file}"
   sed -i -e "s@{{ *storage_backend *}}@${STORAGE_BACKEND:-}@g" "${temp_file}"
   sed -i -e "s@{{ *cluster_state *}}@$cluster_state@g" "${etcd_temp_file}"
-  if [[ -n "${ETCD_VERSION:-}" ]]; then
-    sed -i -e "s@{{ *pillar\.get('etcd_docker_tag', '\(.*\)') *}}@${ETCD_VERSION}@g" "${etcd_temp_file}"
+  if [[ -n "${ETCD_IMAGE:-}" ]]; then
+    sed -i -e "s@{{ *pillar\.get('etcd_docker_tag', '\(.*\)') *}}@${ETCD_IMAGE}@g" "${etcd_temp_file}"
   else
     sed -i -e "s@{{ *pillar\.get('etcd_docker_tag', '\(.*\)') *}}@\1@g" "${etcd_temp_file}"
   fi
+  if [[ -n "${ETCD_VERSION:-}" ]]; then
+    sed -i -e "s@{{ *pillar\.get('etcd_version', '\(.*\)') *}}@${ETCD_VERSION}@g" "${etcd_temp_file}"
+  else
+    sed -i -e "s@{{ *pillar\.get('etcd_version', '\(.*\)') *}}@\1@g" "${etcd_temp_file}"
+  fi
   # Replace the volume host path
   sed -i -e "s@/mnt/master-pd/var/etcd@/mnt/disks/master-pd/var/etcd@g" "${etcd_temp_file}"
   mv "${etcd_temp_file}" /etc/kubernetes/manifests

cluster/kubemark/config-default.sh

@@ -46,7 +46,9 @@ CLUSTER_IP_RANGE="${CLUSTER_IP_RANGE:-10.240.0.0/11}"
 RUNTIME_CONFIG="${KUBE_RUNTIME_CONFIG:-}"
 TERMINATED_POD_GC_THRESHOLD=${TERMINATED_POD_GC_THRESHOLD:-100}
 
-# Set etcd version (e.g. 3.0.4-migration.1) if you need non-default version.
+# Set etcd image (e.g. 3.0.13-experimental.1) version (e.g. 3.0.13) if you need
+# non-default version.
+ETCD_IMAGE="${TEST_ETCD_IMAGE:-}"
 ETCD_VERSION="${TEST_ETCD_VERSION:-}"
 # Storage backend. 'etcd2' supported, 'etcd3' experimental.
 STORAGE_BACKEND=${STORAGE_BACKEND:-etcd2}

cluster/saltbase/salt/etcd/etcd.manifest

@@ -44,7 +44,7 @@
         "value": "{{ storage_backend }}"
       },
       { "name": "TARGET_VERSION",
-        "value": "{{ pillar.get('etcd_docker_tag', '2.2.1') }}"
+        "value": "{{ pillar.get('etcd_version', '2.2.1') }}"
       },
       { "name": "DATA_DIRECTORY",
         "value": "/var/etcd/data{{ suffix }}"