上一节我们成功将 nfs 的volume挂载到 Service上，本节验证 Failover时，数据会不会丢失。
Scale Up
增加副本，并验证数据是否能够同步到新启动的容器上
root@host03:~# docker service update --replicas 4 my_web
my_web
overall progress: 4 out of 4 tasks
1/4: running [==================================================>]
2/4: running [==================================================>]
3/4: running [==================================================>]
4/4: running [==================================================>]
verify: Service converged
root@host03:~# docker service ps my_web
ID NAME IMAGE NODE DESIRED STATE CURRENT STATE ERROR PORTS
a2v73m955o9j my_web.1 httpd:latest host01 Running Running 13 minutes ago
uzdfouv3s2bz my_web.2 httpd:latest host02 Running Running 13 minutes ago
f4tg54ze3hgg my_web.3 httpd:latest host02 Running Running 14 seconds ago
znf4m0jpa0r5 my_web.4 httpd:latest host01 Running Running 14 seconds ago
root@host01:~# docker inspect my_web.4.znf4m0jpa0r5p3fklp1hgdwhu | jq .[0].Mounts
[
{
"Type": "volume",
"Name": "volume-nfs",
"Source": "/var/lib/docker/volumes/volume-nfs/_data",
"Destination": "/usr/local/apache2/htdocs",
"Driver": "local",
"Mode": "z",
"RW": true,
"Propagation": ""
}
]
root@host01:~# docker exec my_web.4.znf4m0jpa0r5p3fklp1hgdwhu cat /usr/local/apache2/htdocs/index.html
docker swarm nfs volume test
root@host02:~# docker inspect my_web.3.f4tg54ze3hggppy96jldhtdxs | jq .[0].Mounts
[
{
"Type": "volume",
"Name": "volume-nfs",
"Source": "/var/lib/docker/volumes/volume-nfs/_data",
"Destination": "/usr/local/apache2/htdocs",
"Driver": "local",
"Mode": "z",
"RW": true,
"Propagation": ""
}
]
root@host02:~# docker exec my_web.3.f4tg54ze3hggppy96jldhtdxs cat /usr/local/apache2/htdocs/index.html
docker swarm nfs volume test
更新Volume内容，并进行验证
root@host03:~# echo "add test str" >> /var/nfs/index.html
root@host03:~# cat /var/nfs/index.html
docker swarm nfs volume test
add test str
root@host03:~# curl http://10.12.31.211
docker swarm nfs volume test
add test str
root@host03:~# curl http://10.12.31.212
docker swarm nfs volume test
add test str
root@host03:~# curl http://10.12.31.213
docker swarm nfs volume test
add test str
root@host03:~# docker service ps my_web
ID NAME IMAGE NODE DESIRED STATE CURRENT STATE ERROR PORTS
a2v73m955o9j my_web.1 httpd:latest host01 Running Running 17 minutes ago
uzdfouv3s2bz my_web.2 httpd:latest host02 Running Running 17 minutes ago
f4tg54ze3hgg my_web.3 httpd:latest host02 Running Running 4 minutes ago
znf4m0jpa0r5 my_web.4 httpd:latest host01 Running Running 4 minutes ago
root@host01:~# docker exec my_web.1.a2v73m955o9js3fbihf0dwei6 cat /usr/local/apache2/htdocs/index.html
docker swarm nfs volume test
add test str
root@host01:~# docker exec my_web.4.znf4m0jpa0r5p3fklp1hgdwhu cat /usr/local/apache2/htdocs/index.html
docker swarm nfs volume test
add test str
root@host02:~# docker exec my_web.2.uzdfouv3s2bz0ohyahjeeyqao cat /usr/local/apache2/htdocs/index.html
docker swarm nfs volume test
add test str
root@host02:~# docker exec my_web.3.f4tg54ze3hggppy96jldhtdxs cat /usr/local/apache2/htdocs/index.html
docker swarm nfs volume test
add test str
Failover 验证，host01关机
root@host03:~# docker service ps my_web
ID NAME IMAGE NODE DESIRED STATE CURRENT STATE ERROR PORTS
a2v73m955o9j my_web.1 httpd:latest host01 Running Running 9 seconds ago
uzdfouv3s2bz my_web.2 httpd:latest host02 Running Running 21 minutes ago
f4tg54ze3hgg my_web.3 httpd:latest host02 Running Running 8 minutes ago
znf4m0jpa0r5 my_web.4 httpd:latest host01 Running Running 9 seconds ago
root@host03:~# docker service ps my_web
ID NAME IMAGE NODE DESIRED STATE CURRENT STATE ERROR PORTS
i4j8tplkkq34 my_web.1 httpd:latest host02 Ready Ready less than a second ago
a2v73m955o9j \_ my_web.1 httpd:latest host01 Shutdown Running 10 seconds ago
uzdfouv3s2bz my_web.2 httpd:latest host02 Running Running 21 minutes ago
f4tg54ze3hgg my_web.3 httpd:latest host02 Running Running 8 minutes ago
ve0j4of1m1ao my_web.4 httpd:latest host02 Ready Ready less than a second ago
znf4m0jpa0r5 \_ my_web.4 httpd:latest host01 Shutdown Running 10 seconds ago
root@host03:~# docker service ps my_web
ID NAME IMAGE NODE DESIRED STATE CURRENT STATE ERROR PORTS
i4j8tplkkq34 my_web.1 httpd:latest host02 Running Ready 4 seconds ago
a2v73m955o9j \_ my_web.1 httpd:latest host01 Shutdown Running 15 seconds ago
uzdfouv3s2bz my_web.2 httpd:latest host02 Running Running 21 minutes ago
f4tg54ze3hgg my_web.3 httpd:latest host02 Running Running 8 minutes ago
ve0j4of1m1ao my_web.4 httpd:latest host02 Running Ready 4 seconds ago
znf4m0jpa0r5 \_ my_web.4 httpd:latest host01 Shutdown Running 15 seconds ago
root@host02:~# docker ps | grep my_web
e46bd42b6fda httpd:latest "httpd-foreground" About a minute ago Up About a minute 80/tcp my_web.4.ve0j4of1m1aosbmpg9yew8dxr
5338df22fc68 httpd:latest "httpd-foreground" About a minute ago Up About a minute 80/tcp my_web.1.i4j8tplkkq348ae0tcdcrl38r
426a79228471 httpd:latest "httpd-foreground" 10 minutes ago Up 10 minutes 80/tcp my_web.3.f4tg54ze3hggppy96jldhtdxs
5c5fffec6de6 httpd:latest "httpd-foreground" 23 minutes ago Up 23 minutes 80/tcp my_web.2.uzdfouv3s2bz0ohyahjeeyqao
root@host02:~# docker exec my_web.1.i4j8tplkkq348ae0tcdcrl38r cat /usr/local/apache2/htdocs/index.html
docker swarm nfs volume test
add test str
root@host02:~# docker exec my_web.4.ve0j4of1m1aosbmpg9yew8dxr cat /usr/local/apache2/htdocs/index.html
docker swarm nfs volume test
add test str
root@host03:~# curl http://10.12.31.211 # 因为host01 关机了，所有host01的ip也访问不了了
curl: (7) Failed to connect to 10.12.31.211 port 80: No route to host
root@host03:~# curl http://10.12.31.212
docker swarm nfs volume test
add test str
root@host03:~# curl http://10.12.31.213
docker swarm nfs volume test
add test str
- 验证 Swarm 数据持久性 - 每天5分钟玩转 Docker 容器技术（104）
上一节我们成功将 Rex-Ray Volume 挂载到了 Service.本节验证 Failover 时,数据不会丢失. Scale Up 增加一个副本: docker service update ...
- 使用JSON Schema来验证接口数据
最近在做一些关于JSON Schema的基建,JSON Schema可以描述一个JSON结构,那么反过来他也可以来验证一个JSON是否符合期望的格式. 如果之前看我写的<使用joi来验证数据模型 ...
- PHP正则自动验证传入数据
本文出至:新太潮流网络博客 /** * [is_string_regular_type 正则自动验证传入数据] * @E-mial wuliqiang_aa@163.com * @TIME 2017- ...
- 04: Form 验证用户数据 & 生成html
目录:Django其他篇 01:Django基础篇 02:Django进阶篇 03:Django数据库操作--->Model 04: Form 验证用户数据 & 生成html 05:Mo ...
- vue学习记录：vue引入，validator验证，数据信息，vuex数据共享
最近在学习vue,关于学习过程中所遇到的问题进行记录,包含vue引入,validator验证,数据信息,vuex数据共享,传值问题记录 1.vue 引入vue vue的大致形式如下: <temp ...
- 基于Volley，Gson封装支持JWT无状态安全验证和数据防篡改的GsonRequest网络请求类
这段时间做新的Android项目的client和和REST API通讯框架架构设计.使用了非常多新技术,终于的方案也相当简洁优雅.client仅仅须要传Java对象,server端返回json字符串, ...
- Android Studio 之 SharedPrefences 数据持久性保存
SharedPreferences 会在应用包目录中生成一个xml文件,将数据保存在里面 可以实现数据持久性保存. 创建的数据,保存在 Data -> Data -> 包名 -> s ...
- Ruby Rails学习中：User 模型，验证用户数据
用户建模 一. User 模型 实现用户注册功能的第一步是,创建一个数据结构,用于存取用户的信息. 在 Rails 中,数据模型的默认数据结构叫模型(model,MVC 中的 M).Rails 为解决 ...
- 使用System.ComponentModel.DataAnnotations验证字段数据正确性
在.NET MVC 中,当页面提交model到Action的时候,自动填充ModelState.使用ModelState.IsValid进行方便快捷的数据验证,其验证也是调用命名空间System.Co ...
随机推荐
- What happens in an async method
https://docs.microsoft.com/en-us/dotnet/csharp/programming-guide/concepts/async/task-asynchronous-pr ...
- win10备忘
你要允许来自未知发布者 http://www.xitonghe.com/jiaocheng/Windows10-7809.html输入法 切换繁体 ctrl+shift+F win10 输入法 htt ...
- ActivityLifecycleCallbacks
public class ActivityLifecycleCallbacks implements Application.ActivityLifecycleCallbacks, ActivityS ...
- Mysql general_log 日志详解
开启 general log 将所有到达MySQL Server的SQL语句记录下来. 一般不会开启开功能,因为log的量会非常庞大.但个别情况下可能会临时的开一会儿general log以供排障使 ...
- MIL/SIL/PIL/HIL/VIL
MIL:Model in the loop 模型在环,对模型在模型的开发环境下(如SIMULINK)进行仿真,通过输入一系列的测试用例,验证模型是否满足设计的功能需求.验证控制算法模型是否准确地实现了 ...
- ASP.NET Core-Docs：在 ASP.NET Core 中启用跨域请求（CORS）
ylbtech-ASP.NET Core-Docs:在 ASP.NET Core 中启用跨域请求(CORS) 1.返回顶部 2.返回顶部 3.返回顶部 4.返回顶部 5.返回顶部 1. ...
- jenkins凭证与新建任务
一.凭证介绍 有许多第三方网站和应用程序可以与 Jenkins 进行交互,例如程序代码仓库,云存储系统和服务等. 此类应用程序的系统管理员可以在应用程序中配置凭证以专供 Jenkins 使用.通常通过 ...
- 抓包工具chlers的使用
1,下载chlers破解版:https://zhubangbang.com/charles-crack-version-free-download-and-install-tutorial.html ...
- ubuntu install themes && use it
one step: I am going to show you the installation of a theme with Numix theme and Unity Tweak Tool. ...
- 问题 1014: [编程入门]阶乘求和python)：（本地测试正确；但提交不对！！？？）求教
问题 1014: [编程入门]阶乘求和 时间限制: 1Sec 内存限制: 128MB 提交: 27629 解决: 5450 题目描述 求Sn=1!+2!+3!+4!+5!+…+n!之值,其中n是一个数 ...
