手把手教你安装第一个 LAIN 应用（下）

package main
import (    "net/http")
func main() {    http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {        w.Write([]byte("Hello, LAIN."))    })
    http.ListenAndServe(":8080", nil)}

appname: hello-world  # 应用名，在集群内唯一，由小写字母、数字和 `-` 组成，且开头不能为数字，不能有连续的 `-`
build:  # 描述如何构建 hello-world:build-${git-committer-date}-${git-commit-hash} 镜像  base: golang:1.8  # 基础镜像，类似于 Dockerfile 里的 FROM  script:    - go build -o hello-world  # 编译指令，类似于 Dockerfile 里的 RUN，WORKDIR 为 /lain/app
proc.web:  # 定义一个 proc，名字为 web  type: web  # proc 类型为 web（LAIN 会为 web 类型的 proc 配置 ${appname}.${LAIN-domain} 的域名，对外提供 HTTP 服务）  cmd: /lain/app/hello-world  # 因为 WORKDIR 为 /lain/app，所以编译好的程序在 /lain/app 目录下  port: 8080  # hello-world 监听的端口

[vagrant@lain ~]$ cd ${hello-world-project}  # 进入工程目录
[vagrant@lain hello-world]$ lain build  # 构建 hello-world:build-${git-committer-date}-${git-commit-hash} 镜像，生成编译结果>>> Building meta and release images ...>>> found shared prepare image at remote and local, sync ...>>> generating dockerfile to /Users/bibaijin/Projects/go/src/github.com/laincloud/hello-world/Dockerfile>>> building image hello-world:build-1496631978-a46ef7afcbbc18c1c1248bcbb84fa770d0758005 ...Sending build context to Docker daemon 6.656 kBStep 1/4 : FROM registry.lain.local/hello-world:prepare-0-1494908044 ---> 7406706a7f21Step 2/4 : COPY . /lain/app/ ---> 45f6215362adRemoving intermediate container 41e822d3b086Step 3/4 : WORKDIR /lain/app/ ---> 75c0f3094b6eRemoving intermediate container 24065cf1d7deStep 4/4 : RUN ( go build -o hello-world ) ---> Running in 43cefd489608 ---> 644f596f83c8Removing intermediate container 43cefd489608Successfully built 644f596f83c8>>> build succeeded: hello-world:build-1496631978-a46ef7afcbbc18c1c1248bcbb84fa770d0758005>>> tag hello-world:build-1496631978-a46ef7afcbbc18c1c1248bcbb84fa770d0758005 as hello-world:release-1496631978-a46ef7afcbbc18c1c1248bcbb84fa770d0758005>>> generating dockerfile to /Users/bibaijin/Projects/go/src/github.com/laincloud/hello-world/Dockerfile>>> building image hello-world:meta-1496631978-a46ef7afcbbc18c1c1248bcbb84fa770d0758005 ...Sending build context to Docker daemon 6.656 kBStep 1/2 : FROM scratch --->Step 2/2 : COPY lain.yaml /lain.yaml ---> cfdb9c518f0dRemoving intermediate container ab94a3603b8aSuccessfully built cfdb9c518f0d>>> build succeeded: hello-world:meta-1496631978-a46ef7afcbbc18c1c1248bcbb84fa770d0758005>>> Done lain build.
[vagrant@lain hello-world]$ lain run web  # 在本地运行>>> run proc hello-world.web.web with image hello-world:release-1496631978-a46ef7afcbbc18c1c1248bcbb84fa770d075800559f7fe4b1a7c6214361ecd5e06b19023ab7e02058888aa625749028af7b92954>>> container name: hello-world.web.web>>> port mapping:>>> 8080/tcp -> 0.0.0.0:32769

CONTAINER ID        IMAGE                                                                     COMMAND                  CREATED             STATUS              PORTS                     NAMES59f7fe4b1a7c        hello-world:release-1496631978-a46ef7afcbbc18c1c1248bcbb84fa770d0758005   "/lain/app/hello-w..."   27 seconds ago      Up 31 seconds       0.0.0.0:32769->8080/tcp   hello-world.web.web

[vagrant@lain hello-world]$ curl http://localhost:32769Hello, LAIN.

[vagrant@lain ~]$ cd ${hello-world-project}  # 进入工程目录
[vagrant@lain hello-world]$ lain build  # 构建 hello-world:build-${git-committer-date}-${git-commit-hash} 镜像，生成编译结果
[vagrant@lain hello-world]$ lain tag local  # 类似于 docker tag，为 hello-world:(meta/release)-${git-committer-date}-${git-commit-hash} 镜像添加仓库前缀>>> Taging meta and relese image ...>>> tag hello-world:meta-1496631978-a46ef7afcbbc18c1c1248bcbb84fa770d0758005 as registry.lain.local/hello-world:meta-1496631978-a46ef7afcbbc18c1c1248bcbb84fa770d0758005>>> tag hello-world:release-1496631978-a46ef7afcbbc18c1c1248bcbb84fa770d0758005 as registry.lain.local/hello-world:release-1496631978-a46ef7afcbbc18c1c1248bcbb84fa770d0758005>>> Done lain tag.
[vagrant@lain hello-world]$ lain push local  # 类似于 docker push，将镜像推送到 LAIN 集群>>> Pushing meta and release images ...>>> pushing image registry.lain.local/hello-world:meta-1496631978-a46ef7afcbbc18c1c1248bcbb84fa770d0758005 ...The push refers to a repository [registry.lain.local/hello-world]1a4886bd9611: Layer already existsmeta-1496631978-a46ef7afcbbc18c1c1248bcbb84fa770d0758005: digest: sha256:daed70190af5fa980d6963fd3a6350591708c1568e180fe85e7eb6cfdd12d998 size: 524>>> pushing image registry.lain.local/hello-world:release-1496631978-a46ef7afcbbc18c1c1248bcbb84fa770d0758005 ...The push refers to a repository [registry.lain.local/hello-world]1a2245680fe1: Layer already existsdfe083dd50ba: Layer already existsedac683c8e67: Layer already exists0372f18510d4: Layer already existsc0b53d6ac422: Layer already existsbcf20a0a17f3: Layer already exists9d039e60afe3: Layer already existsa172d29265f3: Layer already existse6562eb04a92: Layer already exists596280599f68: Layer already exists5d6cbe0dbcf9: Layer already existsrelease-1496631978-a46ef7afcbbc18c1c1248bcbb84fa770d0758005: digest: sha256:1cea69b6ed882fcc16f1f5661b3830a8b3f20263264c51d0610b8ec09e72a439 size: 2626>>> Done lain push.
[vagrant@lain hello-world]$ lain deploy local  # 将应用部署到 LAIN 集群>>> Begin deploy app hello-world to local ...upgrading... Done.>>> app hello-world deploy operation:>>>     last version: 1496631978-a46ef7afcbbc18c1c1248bcbb84fa770d0758005>>>     this version: 1496631978-a46ef7afcbbc18c1c1248bcbb84fa770d0758005>>> if shit happened, rollback your app by:>>>     lain deploy -v 1496631978-a46ef7afcbbc18c1c1248bcbb84fa770d0758005

[vagrant@lain hello-world]$ curl -H "Host: hello-world.lain.local" http://192.168.77.201Hello, LAIN.

[vagrant@lain hello-world]$ echo "192.168.77.201 hello-world.lain.local" >> /etc/hosts[vagrant@lain hello-world]$ curl http://hello-world.lain.localHello, LAIN.