首先直奔主题,看看Docker Cloud的几大关键性功能:
而在今天的文章中,我们将探讨:
- Docker Cloud各核心概念
- 如何创建一个新的Docker Cloud节点
- 如何安装Docker Cloud CLI
- 如何创建一项新的Docker Cloud服务
- 在Docker Cloud中访问Couchbase Server
- 如何终止Docker Cloud服务与节点
最后,我们还将共享部分Docker Cloud参考文档。
本文将使用Couchbase Server——一套面向Docker镜像的开源、高扩展性、JSON文件数据库。
Docker Cloud简要介绍
下面来看如何在Amazon中利用Docker Cloud运行Docker镜像:
- brew install docker-cloud
- docker-cloud nodecluster create -t 1 --tag couchbase couchbase-node aws us-west-1 m3.large
- docker-cloud service create --tag couchbase -p 8091:8091 -p 8092:8092 -p 8093:8093 -p 11210:11210 arungupta/couchbase
- docker-cloud service start {SERVICE_ID}
- docker-cloud service inspect {SERVICE_ID} | jq ".container_ports[0].endpoint_uri" | sed 's/tcp/http/g'
接着开始具体探讨。
Docker Cloud各核心概念
- 节点即用于部署及运行应用的各独立Linux主机/虚拟机。用户可配置更多新节点以提升容量。Docker Cloud并不提供托管服务。各节点利用物理服务器、虚拟机或者云服务供应商进行配置。
- 节点集群属于同类节点的逻辑组。节点集群允许我们通过配置更多节点轻松实现基础设施规模扩展。
- 服务为来自同一镜像的容器逻辑组。服务能够轻松将应用扩展至各不同节点当中。
Docker Cloud可通过Web、CLI或者REST API进行托管。本文将利用Docker Cloud CLI执行各项命令。
安装Docker Cloud CLI
安装Docker Cloud CLI:
- brew install docker-cloud
- ==> Downloading https://homebrew.bintray.com/bottles/docker-cloud-1.0.2.yosemite.bottle.tar.gz
- Already downloaded: /Library/Caches/Homebrew/docker-cloud-1.0.2.yosemite.bottle.tar.gz
- ==> Pouring docker-cloud-1.0.2.yosemite.bottle.tar.gz
- �� /usr/local/Cellar/docker-cloud/1.0.2: 482 files, 4.1M
更为完整的安装操作请参阅“安装CLI”一文。
检查版本:
- docker-cloud -v
- docker-cloud 1.0.2
完整的命令内容如下:
- usage: docker-cloud [-h] [-v]
- {action,container,event,exec,login,node,nodecluster,repository,run,service,stack,tag,trigger,up}
- ...
- Docker Cloud CLI
- optional arguments:
- -h, --help show this help message and exit
- -v, --version show program's version number and exit
- Docker Cloud CLI commands:
- {action,container,event,exec,login,node,nodecluster,repository,run,service,stack,tag,trigger,up}
- action Action-related operations
- container Container-related operations
- event Get real time Docker Cloud events
- exec Run a command in a running container
- login Please use "docker login" to log into Docker Cloud
- node Node-related operations
- nodecluster NodeCluster-related operations
- repository Repository-related operations
- run Create and run a new service
- service Service-related operations
- stack Stack-related operations
- tag Tag-related operations
- trigger Trigger-related operations
- up Create and deploy a stack
保存并登录凭证:
- docker login
- Username: arungupta
- Password:
- Email: arun.gupta@gmail.com
- WARNING: login credentials saved in /Users/arungupta/.docker/config.json
- Login Succeeded
创建新的Docker Cloud节点
根据云服务供应商相关说明链接利用Docker Cloud Web UI注册您的云供应商证书。目前支持Amazon、Digital Ocean、Azure等主流供应商。
利用单一节点创建一套节点集群:
- docker-cloud nodecluster create -t 1 --tag couchbase couchbase-node aws us-west-1 m3.large
- 42a34e04-02e1-47be-bf87-ec06e0e0b604
此节点拥有一个节点(-t 1),且使用标签“couchbase” (--tag couchbase)。最后四条参数分别代表节点集群名称(couchbase-node)、供应商(aws)、区域(us-west-1)以及节点类型(m3.large)。
此节点集群中的每个节点都将分配有标签,并用于随后将服务指定至特定节点或者节点集群。
此节点集群的运行状态如下:
- docker-cloud nodecluster inspect 42a34e04-02e1-47be-bf87-ec06e0e0b604 | jq
- {
- "disk": 60,
- "uuid": "42a34e04-02e1-47be-bf87-ec06e0e0b604",
- "tags": [
- {
- "name": "couchbase"
- }
- ],
- "current_num_nodes": 1,
- "region": "/api/infra/v1/region/aws/us-west-1/",
- "target_num_nodes": 1,
- "state": "Deployed",
- "node_type": "/api/infra/v1/nodetype/aws/m3.large/",
- "resource_uri": "/api/infra/v1/nodecluster/42a34e04-02e1-47be-bf87-ec06e0e0b604/",
- "destroyed_datetime": null,
- "provider_options": {},
- "nodes": [
- "/api/infra/v1/node/5c4c78e0-71c9-4420-9a1d-fdb04a35d1de/"
- ],
- "deployed_datetime": "Tue, 15 Mar 2016 17:18:17 +0000",
- "nickname": "couchbase-node",
- "dockercloud_action_uri": "",
- "name": "couchbase-node"
- }
Cloud.docker.com的仪表板更新如下:
亦可查看更多关于各个节点的具体信息:
创建一项新的Docker Cloud服务
创建一项Docker Cloud服务:
- docker-cloud service create -p 8091:8091 -p 8092:8092 -p 8093:8093 -p 11210:11210 arungupta/couchbase
- 834343fd-b1d5-4d66-a2cd-69d27a471658
如果存在多个节点集群,则可使用--tag将一项服务分配至一套节点集群。
docker-cli#10字段旨在确保多个端口可通过-p 8091-8093:8091-8093格式进行公开。
这里使用的Docker镜像为arungupta/couchbase。此镜像基于Docker Hub上的官方couchbase镜像,且针对不同服务进行了预配置。
启动该Docker Cloud服务:
- docker-cloud service start 834343fd-b1d5-4d66-a2cd-69d27a471658
- 834343fd-b1d5-4d66-a2cd-69d27a471658
更新后的仪表板如下:
获取该Docker Cloud服务日志:
- docker-cloud service logs 834343fd-b1d5-4d66-a2cd-69d27a471658
- couchbase-d96eed5d-1 | 2016-03-14T22:54:04.826000846Z Starting Couchbase Server -- Web UI available at http://:8091
- couchbase-d96eed5d-1 | 2016-03-14T22:54:19.832855273Z * Trying 127.0.0.1...
- couchbase-d96eed5d-1 | 2016-03-14T22:54:19.833816400Z % Total % Received % Xferd Average Speed Time Time Time Current
- couchbase-d96eed5d-1 | 2016-03-14T22:54:19.834647384Z Dload Upload Total Spent Left Speed
- 0 0 0 0 0 0 0 0 --:--:-- --:--:-- --:--:-- 0* Connected to 127.0.0.1 (127.0.0.1) port 8091 (#0)
- couchbase-d96eed5d-1 | 2016-03-14T22:54:19.835659864Z > POST /pools/default HTTP/1.1
- couchbase-d96eed5d-1 | 2016-03-14T22:54:19.835705633Z > User-Agent: curl/7.40.0-DEV
- couchbase-d96eed5d-1 | 2016-03-14T22:54:19.835764766Z > Host: 127.0.0.1:8091
- couchbase-d96eed5d-1 | 2016-03-14T22:54:19.835808491Z > Accept: */*
- couchbase-d96eed5d-1 | 2016-03-14T22:54:19.835849972Z > Content-Length: 36
- couchbase-d96eed5d-1 | 2016-03-14T22:54:19.835890805Z > Content-Type: application/x-www-form-urlencoded
- couchbase-d96eed5d-1 | 2016-03-14T22:54:19.835951739Z >
- couchbase-d96eed5d-1 | 2016-03-14T22:54:19.836153748Z } [36 bytes data]
- couchbase-d96eed5d-1 | 2016-03-14T22:54:19.836431490Z * upload completely sent off: 36 out of 36 bytes
- couchbase-d96eed5d-1 | 2016-03-14T22:54:19.838702601Z < HTTP/1.1 200 OK
- couchbase-d96eed5d-1 | 2016-03-14T22:54:19.838831946Z < Server: Couchbase Server
- couchbase-d96eed5d-1 | 2016-03-14T22:54:19.838882039Z < Pragma: no-cache
- couchbase-d96eed5d-1 | 2016-03-14T22:54:19.838929456Z < Date: Mon, 14 Mar 2016 22:54:19 GMT
- couchbase-d96eed5d-1 | 2016-03-14T22:54:19.838944199Z < Content-Length: 0
- couchbase-d96eed5d-1 | 2016-03-14T22:54:19.838973658Z < Cache-Control: no-cache
- couchbase-d96eed5d-1 | 2016-03-14T22:54:19.838984780Z <
- 100 36 0 0 100 36 0 5643 --:--:-- --:--:-- --:--:-- 6000
- couchbase-d96eed5d-1 | 2016-03-14T22:54:19.839338450Z * Connection #0 to host 127.0.0.1 left intact
- couchbase-d96eed5d-1 | 2016-03-14T22:54:19.843462008Z * Trying 127.0.0.1...
- couchbase-d96eed5d-1 | 2016-03-14T22:54:19.844335715Z % Total % Received % Xferd Average Speed Time Time Time Current
- couchbase-d96eed5d-1 | 2016-03-14T22:54:19.845478686Z Dload Upload Total Spent Left Speed
- 0 0 0 0 0 0 0 0 --:--:-- --:--:-- --:--:-- 0* Connected to 127.0.0.1 (127.0.0.1) port 8091 (#0)
- couchbase-d96eed5d-1 | 2016-03-14T22:54:19.845676061Z > POST /node/controller/setupServices HTTP/1.1
- couchbase-d96eed5d-1 | 2016-03-14T22:54:19.845729619Z > User-Agent: curl/7.40.0-DEV
- couchbase-d96eed5d-1 | 2016-03-14T22:54:19.845805193Z > Host: 127.0.0.1:8091
- couchbase-d96eed5d-1 | 2016-03-14T22:54:19.845858410Z > Accept: */*
- couchbase-d96eed5d-1 | 2016-03-14T22:54:19.845911479Z > Content-Length: 26
- couchbase-d96eed5d-1 | 2016-03-14T22:54:19.845986653Z > Content-Type: application/x-www-form-urlencoded
- couchbase-d96eed5d-1 | 2016-03-14T22:54:19.846040578Z >
- couchbase-d96eed5d-1 | 2016-03-14T22:54:19.846312512Z } [26 bytes data]
- couchbase-d96eed5d-1 | 2016-03-14T22:54:19.846561659Z * upload completely sent off: 26 out of 26 bytes
- couchbase-d96eed5d-1 | 2016-03-14T22:54:19.847024846Z < HTTP/1.1 200 OK
- couchbase-d96eed5d-1 | 2016-03-14T22:54:19.847082032Z < Server: Couchbase Server
- couchbase-d96eed5d-1 | 2016-03-14T22:54:19.847157246Z < Pragma: no-cache
- couchbase-d96eed5d-1 | 2016-03-14T22:54:19.847211690Z < Date: Mon, 14 Mar 2016 22:54:19 GMT
- couchbase-d96eed5d-1 | 2016-03-14T22:54:19.847266024Z < Content-Length: 0
- couchbase-d96eed5d-1 | 2016-03-14T22:54:19.847344403Z < Cache-Control: no-cache
- couchbase-d96eed5d-1 | 2016-03-14T22:54:19.847411160Z <
- 100 26 0 0 100 26 0 6056 --:--:-- --:--:-- --:--:-- 8666
- couchbase-d96eed5d-1 | 2016-03-14T22:54:19.849284426Z * Connection #0 to host 127.0.0.1 left intact
- couchbase-d96eed5d-1 | 2016-03-14T22:54:19.853702443Z * Trying 127.0.0.1...
- couchbase-d96eed5d-1 | 2016-03-14T22:54:19.853890120Z % Total % Received % Xferd Average Speed Time Time Time Current
- couchbase-d96eed5d-1 | 2016-03-14T22:54:19.853943309Z Dload Upload Total Spent Left Speed
- 0 0 0 0 0 0 0 0 --:--:-- --:--:-- --:--:-- 0* Connected to 127.0.0.1 (127.0.0.1) port 8091 (#0)
- couchbase-d96eed5d-1 | 2016-03-14T22:54:19.854112174Z > POST /settings/web HTTP/1.1
- couchbase-d96eed5d-1 | 2016-03-14T22:54:19.854169870Z > User-Agent: curl/7.40.0-DEV
- couchbase-d96eed5d-1 | 2016-03-14T22:54:19.854223412Z > Host: 127.0.0.1:8091
- couchbase-d96eed5d-1 | 2016-03-14T22:54:19.854278756Z > Accept: */*
- couchbase-d96eed5d-1 | 2016-03-14T22:54:19.854335649Z > Content-Length: 50
- couchbase-d96eed5d-1 | 2016-03-14T22:54:19.854391073Z > Content-Type: application/x-www-form-urlencoded
- couchbase-d96eed5d-1 | 2016-03-14T22:54:19.854447141Z >
- couchbase-d96eed5d-1 | 2016-03-14T22:54:19.854683623Z } [50 bytes data]
- couchbase-d96eed5d-1 | 2016-03-14T22:54:19.855024680Z * upload completely sent off: 50 out of 50 bytes
- couchbase-d96eed5d-1 | 2016-03-14T22:54:19.859378932Z < HTTP/1.1 200 OK
- couchbase-d96eed5d-1 | 2016-03-14T22:54:19.859530830Z < Server: Couchbase Server
- couchbase-d96eed5d-1 | 2016-03-14T22:54:19.859611527Z < Pragma: no-cache
- couchbase-d96eed5d-1 | 2016-03-14T22:54:19.859794083Z < Date: Mon, 14 Mar 2016 22:54:19 GMT
- couchbase-d96eed5d-1 | 2016-03-14T22:54:19.859848224Z < Content-Type: application/json
- couchbase-d96eed5d-1 | 2016-03-14T22:54:19.859912932Z < Content-Length: 39
- couchbase-d96eed5d-1 | 2016-03-14T22:54:19.859957829Z < Cache-Control: no-cache
- couchbase-d96eed5d-1 | 2016-03-14T22:54:19.859972017Z <
- couchbase-d96eed5d-1 | 2016-03-14T22:54:19.859986584Z { [39 bytes data]
- 100 89 100 39 100 50 6060 7770 --:--:-- --:--:-- --:--:-- 8333
- couchbase-d96eed5d-1 | 2016-03-14T22:54:19.860221103Z * Connection #0 to host 127.0.0.1 left intact
- couchbase-d96eed5d-1 | 2016-03-14T22:54:19.860730000Z {"newBaseUri":"http://127.0.0.1:8091/"}/entrypoint.sh couchbase-server
日志的输出结果来自被回调以配置Couchbase服务器的Couchbase REST API。
在Docker Cloud内访问Couchbase Server
检查Docker Cloud服务以获取公开的容器端口:
- docker-cloud service inspect 834343fd-b1d5-4d66-a2cd-69d27a471658 | jq ".container_ports"
- [
- {
- "protocol": "tcp",
- "outer_port": 8091,
- "inner_port": 8091,
- "port_name": "unknown",
- "published": true,
- "endpoint_uri": "tcp://couchbase-d96eed5d.834343fd.svc.dockerapp.io:8091/"
- },
- {
- "protocol": "tcp",
- "outer_port": 8092,
- "inner_port": 8092,
- "port_name": "unknown",
- "published": true,
- "endpoint_uri": "tcp://couchbase-d96eed5d.834343fd.svc.dockerapp.io:8092/"
- },
- {
- "protocol": "tcp",
- "outer_port": 8093,
- "inner_port": 8093,
- "port_name": "unknown",
- "published": true,
- "endpoint_uri": "tcp://couchbase-d96eed5d.834343fd.svc.dockerapp.io:8093/"
- },
- {
- "protocol": "tcp",
- "outer_port": 11210,
- "inner_port": 11210,
- "port_name": "unknown",
- "published": true,
- "endpoint_uri": "tcp://couchbase-d96eed5d.834343fd.svc.dockerapp.io:11210/"
- }
- ]
更具体地讲,Couchbase Web Console的URI可整理为:
- docker-cloud service inspect 834343fd-b1d5-4d66-a2cd-69d27a471658 | jq ".container_ports[0].endpoint_uri" | sed 's/tcp/http/g'
- "http://couchbase-d96eed5d.834343fd.svc.dockerapp.io:8091/"
利用http://couchbase-d96eed5d.834343fd.svc.dockerapp.io:8091/访问Couchbase Web Console即可查看其登录界面。输入 Administrator与password。
Couchbase Web Console如下所示:
终止Docker Cloud服务与节点
检查当前正在运行的各Docker Cloud服务:
- docker-cloud service ps
- NAME UUID STATUS #CONTAINERS IMAGE DEPLOYED PUBLIC DNS STACK
- couchbase-d96eed5d 834343fd ▶ Running 1 arungupta/couchbase:latest 26 minutes ago couchbase-d96eed5d.834343fd.svc.dockerapp.io
终止该服务:
- docker-cloud service terminate couchbase-d96eed5d
- 834343fd-b1d5-4d66-a2cd-69d27a471658
检查节点列表:
- docker-cloud node ls
- UUID FQDN LASTSEEN STATUS CLUSTER DOCKER_VER
- a8059155 a8059155-390c-42db-9fb1-3b1bd3fb222c.node.dockerapp.io 1 minute ago ▶ Deployed couchbase-node 1.9.1-cs2
终止该节点:
- docker-cloud node rm a8059155
- a8059155-390c-42db-9fb1-3b1bd3fb222c
原文标题:Couchbase Server: Getting Started With Docker Cloud
【51CTO.com独家译稿,合作站点转载请注明来源】