docs: add m3db install (#414)

* docs: add m3db install

* change transfer default settings

docs/m3db-install.md

@@ -0,0 +1,49 @@
+# 安装 M3db，ETCD
+
+下载安装包 [m3db-install.tar.gz](https://s3-gz01.didistatic.com/n9e-pub/tarball/m3db-install.tar.gz) 
+
+
+## 配置
+#### etcd证书
+```shell
+# 修改 ./etcd/certs/config/hosts-etcd
+# 填写etcd的机器列表
+
+# 生成证书
+./etcd/certs/reinit-root-ca.sh
+./etcd/certs/update-etcd-client-certs.sh
+./etcd/certs/update-etcd-server-certs.sh
+```
+
+
+#### m3db 配置
+```shell
+# 修改 ./m3db/etc/m3dbnode.yml
+db:
+  config:
+    service:
+      etcdClusters:
+        - zone: embedded
+          endpoints:
+            - 10.255.0.146:2379  # 这里需要修改 etcd 节点信息
+            - 10.255.0.129:2379
+```
+
+
+## 安装部署
+```shell
+. ./functions.sh
+# 设置安装的机器节点，
+hosts="{node1} {node2} {node3}"
+# 设置好ssh Public key认证后，设置 publick key 用户名
+user="dc2-user"
+
+# 同步文件
+sync
+
+# 安装
+install
+
+# 检查
+status
+```

etc/transfer.yml

@@ -3,7 +3,7 @@ backend:
   m3db:
     enabled: false
     name: "m3db"
-    namespace: "test"
+    namespace: "default"
     seriesLimit: 0
     docsLimit: 0
     daysLimit: 7                               # max query time
@@ -15,7 +15,7 @@ backend:
         # KV environment, zone, and service from which to write/read KV data (placement
         # and configuration). Leave these as the default values unless you know what
         # you're doing.
-        env: default_env
+        env: default
         zone: embedded
         service: m3db
         etcdClusters:
@@ -23,9 +23,9 @@ backend:
             endpoints:
               - 127.0.0.1:2379
             tls:
-              caCrtPath: /opt/run/etcd/certs/root/ca.pem
-              crtPath: /opt/run/etcd/certs/output/etcd-client.pem
-              keyPath: /opt/run/etcd/certs/output/etcd-client-key.pem
+              caCrtPath: /etc/etcd/certs/ca.pem
+              crtPath: /etc/etcd/certs/etcd-client.pem
+              keyPath: /etc/etcd/certs/etcd-client-key.pem
   tsdb:
     enabled: true
     name: "tsdb"