fix etcd dir bug

Signed-off-by: yangyuliufeng <qlw705706@gmail.com>

docs/op/cluster_restore.md

@@ -10,19 +10,18 @@
 - 1.首先搭建一个测试集群，部署几个测试deployment，验证集群各项正常后，进行一次备份：
 
 ``` bash
-$ ansible-playbook /etc/ansible/23.backup.yml
+$ ansible-playbook -i clusters/k8s-01/hosts -e @clusters/k8s-01/config.yml  playbooks/94.backup.yml
 ```
 
-执行完毕可以在备份目录下检查备份情况，示例如下：
+执行完毕可以在部署主机的备份目录下检查备份情况，示例如下：
 
 ```
-/etc/ansible/.cluster/backup/
+/etc/kubeasz/clusters/k8s-01/backup/
-├── hosts
+├── snapshot_202106201205.db
-├── hosts-201907030954
+├── snapshot_202106211406.db
-├── snapshot-201907030954.db
-├── snapshot-201907031048.db
 └── snapshot.db
 ```
+其中，snapshot.db始终为最近一次备份文件
 
 - 2.模拟误删除操作（略）
 
@@ -31,16 +30,21 @@ $ ansible-playbook /etc/ansible/23.backup.yml
 可以在 `roles/cluster-restore/defaults/main.yml` 文件中配置需要恢复的 etcd备份版本（从上述备份目录中选取），默认使用最近一次备份；执行恢复后，需要一定时间等待 pod/svc 等资源恢复重建。
 
 ``` bash
-$ ansible-playbook /etc/ansible/24.restore.yml
+$ ansible-playbook -i clusters/k8s-01/hosts -e @clusters/k8s-01/config.yml  playbooks/94.backup.yml95.restore.yml
 ```
 如果集群主要组件（master/etcd/node）等出现不可恢复问题，可以尝试使用如下步骤 [清理]() --> [创建]() --> [恢复]()
 
 ``` bash
-$ ansible-playbook /etc/ansible/99.clean.yml
+$ ansible-playbook -i clusters/k8s-01/hosts -e @clusters/k8s-01/config.yml  playbooks/99.clean.yml
-$ ansible-playbook /etc/ansible/90.setup.yml
+$ ezctl setup k8s-01 01
-$ ansible-playbook /etc/ansible/24.restore.yml
+$ ezctl setup k8s-01 02
+$ ezctl setup k8s-01 03
+$ ezctl setup k8s-01 04
+$ ezctl setup k8s-01 05
+...
+$ ansible-playbook -i clusters/k8s-01/hosts -e @clusters/k8s-01/config.yml  playbooks/95.restore.yml
 ```
 
 ## 参考
 
-- https://github.com/coreos/etcd/blob/master/Documentation/op-guide/recovery.md 
+- https://etcd.io/docs/v3.4/op-guide/recovery/

roles/cluster-restore/tasks/main.yml

@@ -2,7 +2,7 @@
   service: name=etcd state=stopped
 
 - name: 清除etcd 数据目录
-  file: name=/var/lib/etcd/member state=absent
+  file: name={{ ETCD_DATA_DIR }}/member state=absent
 
 - name: 生成备份目录
   file: name=/etcd_backup state=directory
@@ -24,7 +24,7 @@
 	--initial-advertise-peer-urls https://{{ inventory_hostname }}:2380"
 
 - name: 恢复数据至etcd 数据目录
-  shell: "cp -rf /etcd_backup/etcd-{{ inventory_hostname }}.etcd/member /var/lib/etcd/"
+  shell: "cp -rf /etcd_backup/etcd-{{ inventory_hostname }}.etcd/member {{ ETCD_DATA_DIR }}/"
 
 - name: 重启etcd 服务
   service: name=etcd state=restarted

roles/etcd/clean-etcd.yml

@@ -12,6 +12,7 @@
   - name: remove files and dirs
     file: name={{ item }} state=absent
     with_items:
-    - "/var/lib/etcd"
+    - {{ ETCD_DATA_DIR }}
+    - {{ ETCD_WAL_DIR }}
     - "/backup/k8s"
     - "/etc/systemd/system/etcd.service"

roles/etcd/tasks/main.yml

@@ -1,5 +1,5 @@
 - name: prepare some dirs
-  file: name=/var/lib/etcd state=directory mode=0700
+  file: name={{ ETCD_DATA_DIR }} state=directory mode=0700
 
 - name: 下载etcd二进制文件
   copy: src={{ base_dir }}/bin/{{ item }} dest={{ bin_dir }}/{{ item }} mode=0755

roles/etcd/templates/etcd.service.j2

@@ -7,7 +7,7 @@ Documentation=https://github.com/coreos
 
 [Service]
 Type=notify
-WorkingDirectory=/var/lib/etcd/
+WorkingDirectory={{ ETCD_DATA_DIR }}
 ExecStart={{ bin_dir }}/etcd \
   --name=etcd-{{ inventory_hostname }} \
   --cert-file={{ ca_dir }}/etcd.pem \