Add etcd-events cluster for kube-apiserver (#2385)

Add etcd-events cluster for kube-apiserver

roles/etcd/templates/etcd-events.j2

@@ -0,0 +1,22 @@
+#!/bin/bash
+{{ docker_bin_dir }}/docker run \
+  --restart=on-failure:5 \
+  --env-file=/etc/etcd-events.env \
+  --net=host \
+  -v /etc/ssl/certs:/etc/ssl/certs:ro \
+  -v {{ etcd_cert_dir }}:{{ etcd_cert_dir }}:ro \
+  -v {{ etcd_events_data_dir }}:{{ etcd_events_data_dir }}:rw \
+  {% if etcd_memory_limit is defined %}
+  --memory={{ etcd_memory_limit|regex_replace('Mi', 'M') }} \
+  {% endif %}
+  --oom-kill-disable \
+  {% if etcd_cpu_limit is defined %}
+  --cpu-shares={{ etcd_cpu_limit|regex_replace('m', '') }} \
+  {% endif %}
+  {% if etcd_blkio_weight is defined %}
+  --blkio-weight={{ etcd_blkio_weight }} \
+  {% endif %}
+  --name={{ etcd_member_name }}-events \
+  {{ etcd_image_repo }}:{{ etcd_image_tag }} \
+  /usr/local/bin/etcd \
+  "$@"