*: update etcd version to 3.1.8

Author: hongchaodeng

hack/multi-node/etcd-cloud-config.yaml

@@ -13,7 +13,7 @@ coreos:
       - name: 40-etcd-cluster.conf
         content: |
           [Service]
-          Environment="ETCD_IMAGE_TAG=v3.1.6"
+          Environment="ETCD_IMAGE_TAG=v3.1.8"
           Environment="ETCD_NAME={{ETCD_NODE_NAME}}"
           Environment="ETCD_ADVERTISE_CLIENT_URLS=https://$private_ipv4:2379"
           Environment="ETCD_INITIAL_ADVERTISE_PEER_URLS=https://$private_ipv4:2380"

hack/quickstart/init-master.sh

@@ -25,7 +25,7 @@ function configure_etcd() {
         mkdir -p /etc/systemd/system/etcd-member.service.d
         cat << EOF > /etc/systemd/system/etcd-member.service.d/10-etcd-member.conf
 [Service]
-Environment="ETCD_IMAGE_TAG=v3.1.6"
+Environment="ETCD_IMAGE_TAG=v3.1.8"
 Environment="ETCD_NAME=controller"
 Environment="ETCD_INITIAL_CLUSTER=controller=https://${COREOS_PRIVATE_IPV4}:2380"
 Environment="ETCD_INITIAL_ADVERTISE_PEER_URLS=https://${COREOS_PRIVATE_IPV4}:2380"

hack/single-node/user-data-etcd.sample

@@ -4,7 +4,7 @@
         - name: 10-version.conf
           content: |
             [Service]
-            Environment="ETCD_IMAGE_TAG=v3.1.6"
+            Environment="ETCD_IMAGE_TAG=v3.1.8"
             Environment="ETCD_NAME=default"
             Environment="ETCD_INITIAL_CLUSTER=default=https://127.0.0.1:2380"
             Environment="ETCD_INITIAL_ADVERTISE_PEER_URLS=https://127.0.0.1:2380"

pkg/asset/images.go

@@ -3,7 +3,7 @@ package asset
 // DefaultImages are the defualt images bootkube components use.
 var DefaultImages = ImageVersions{
 	Busybox:         "busybox",
-	Etcd:            "quay.io/coreos/etcd:v3.1.6",
+	Etcd:            "quay.io/coreos/etcd:v3.1.8",
 	EtcdOperator:    "quay.io/coreos/etcd-operator:v0.3.0",
 	Flannel:         "quay.io/coreos/flannel:v0.7.1-amd64",
 	Hyperkube:       "quay.io/coreos/hyperkube:v1.6.4_coreos.0",

pkg/asset/internal/templates.go

@@ -992,7 +992,7 @@ var EtcdTPRTemplate = []byte(`{
   },
   "spec": {
     "size": 1,
-    "version": "v3.1.6",
+    "version": "v3.1.8",
     "pod": {
       "nodeSelector": {
         "node-role.kubernetes.io/master": ""