用tsuru部署Go应用

概述

本文档是在tsuru中部署一个简单的Go应用的实战指南。

在tsuru中创建应用

使用app-create命令创建应用：

  1.     $ tsuru app-create <app-name> <app-platform>

对于Go来说，应用平台是Go！让我们脑洞大开，开发一个’hello world‘教学应用，让我们叫它helloworld：

  1.     $ tsuru app-create helloworld go

使用platform-list命令列出所有的可用的平台。使用app-list查看你所有的应用。

  1.     $ tsuru app-list
  2.     +-------------+-------------------------+--------------------------------+
  3.     | Application | Units State Summary     | Address                        |
  4.     +-------------+-------------------------+--------------------------------+
  5.     | helloworld  | 0 of 0 units in-service | helloworld.192.168.50.4.nip.io |
  6.     +-------------+-------------------------+--------------------------------+

应用的代码

用Go实现的一个简单web应用main.go：

  1.   package main
  3.     import (
  4.         "fmt"
  5.         "net/http"
  6.         "os"
  7.     )
  9.     func main() {
  10.         http.HandleFunc("/", hello)
  11.         fmt.Println("listening...")
  12.         err := http.ListenAndServe(":" + os.Getenv("PORT"), nil)
  13.         if err != nil {
  14.             panic(err)
  15.         }
  16.     }
  18.     func hello(res http.ResponseWriter, req *http.Request) {
  19.         fmt.Fprintln(res, "hello, world!")
  20.     }

通过Git部署

在创建新的应用时，tsuru会显示应该使用的Git远程分支。用app-info命令可以获得其信息：

  1.     $ tsuru app-info --app helloworld
  2.     Application: helloworld
  3.     Repository: git@192.168.50.4.nip.io:helloworld.git
  4.     Platform: go
  5.     Teams: admin
  6.     Address: helloworld.192.168.50.4.nip.io
  7.     Owner: admin@example.com
  8.     Team owner: admin
  9.     Deploys: 0
  10.     Pool: theonepool
  12.     App Plan:
  13.     +---------------+--------+------+-----------+--------+---------+
  14.     | Name          | Memory | Swap | Cpu Share | Router | Default |
  15.     +---------------+--------+------+-----------+--------+---------+
  16.     | autogenerated | 0 MB   | 0 MB | 100       |        | false   |
  17.     +---------------+--------+------+-----------+--------+---------+

Git远程分支被用来通过Git部署应用。当修改被推送到tsuru远程分支时，项目同时也被部署：

  1.     $ git push git@192.168.50.4.nip.io:helloworld.git master
  2.     Counting objects: 3, done.
  3.     Delta compression using up to 4 threads.
  4.     Compressing objects: 100% (2/2), done.
  5.     Writing objects: 100% (3/3), 430 bytes | 0 bytes/s, done.
  6.     Total 3 (delta 0), reused 0 (delta 0)
  7.     remote: tar: Removing leading `/' from member names
  8.     remote: /
  9.     remote:
  10.     remote: ---- Building application image ----
  11.     remote:  ---> Sending image to repository (5.57MB)
  12.     remote:  ---> Cleaning up
  13.     remote:
  14.     remote: ---- Starting 1 new unit ----
  15.     remote:  ---> Started unit b21298a64e...
  16.     remote:
  17.     remote: ---- Binding and checking 1 new units ----
  18.     remote:  ---> Bound and checked unit b21298a64e
  19.     remote:
  20.     remote: ---- Adding routes to 1 new units ----
  21.     remote:  ---> Added route to unit b21298a64e
  22.     remote:
  23.     remote: OK
  24.     To git@192.168.50.4.nip.io:helloworld.git
  25.      * [new branch]      master -> master

如果遇到"Permission denied (publickey)."的错误，请确保你是团队一员并把公钥加到tsuru中。用key-add命令添加公钥：

  1.     $ tsuru key-add mykey ~/.ssh/id_rsa.pub

使用git remote add命令来避免每次push代码时都要输入整个远程仓库的链接：

  1.     $ git remote add tsuru git@192.168.50.4.nip.io:helloworld.git

然后运行：

  1.     $ git push tsuru master
  2.     Everything up-to-date

从此之后就可以省略掉—app标记:

  1.     $ tsuru app-info
  2.     Application: helloworld
  3.     Repository: git@192.168.50.4.nip.io:helloworld.git
  4.     Platform: go
  5.     Teams: admin
  6.     Address: helloworld.192.168.50.4.nip.io
  7.     Owner: admin@example.com
  8.     Team owner: admin
  9.     Deploys: 1
  10.     Pool: theonepool
  11.     Units: 1
  12.     +------------+---------+
  13.     | Unit       | State   |
  14.     +------------+---------+
  15.     | b21298a64e | started |
  16.     +------------+---------+
  18.     App Plan:
  19.     +---------------+--------+------+-----------+--------+---------+
  20.     | Name          | Memory | Swap | Cpu Share | Router | Default |
  21.     +---------------+--------+------+-----------+--------+---------+
  22.     | autogenerated | 0 MB   | 0 MB | 100       |        | false   |
  23.     +---------------+--------+------+-----------+--------+---------+

运行应用

tsuru会自动编译和运行应用，但是也可以定制tsuru编译和运行应用的方式。更多内容，请查看Go平台的README：https://github.com/tsuru/basebuilder/blob/master/go/README.md.

应用部署成功，可以通过app-list命令获得IP或者主机名，然后用浏览器去访问。比如，在下面的列表中：

  2.     $ tsuru app-list
  3.     +-------------+-------------------------+--------------------------------+
  4.     | Application | Units State Summary     | Address                        |
  5.     +-------------+-------------------------+--------------------------------+
  6.     | helloworld  | 1 of 1 units in-service | helloworld.192.168.50.4.nip.io |
  7.     +-------------+-------------------------+--------------------------------+

顺利完成！现在我们有了一个部署在tsuru上的简单go项目，现在我们可以访问app-list返回的blog app的URL了。(本例中的URL是"helloworld.192.168.50.4.nip.io").

进一步探索

更多信息，可以查看tsuru文档，或者阅读tsuru命令完全使用指南。

原文: http://doc.oschina.net/tsuru-paas?t=52822