Go1.12＋go mod로 Docker 컨테이너화
15742 단어 우분투dockerfileGo1.125도커
제목
k8s의 공부가 끝나면, Go의 앱에서도 GKE에 실어 보려고 생각하면서, 그러고 보면, 표제의 편성으로 Docker 컨테이너 만든 적이 없다고 깨닫는다.
전회 마지막에 Docker 컨테이너 만들었을 때는, Go1.9＋dep 이었다, 분명.
그래서 지식을 업데이트해 둔다.
개발 환경
#OS
$ cat /etc/os-release
NAME="Ubuntu"
VERSION="18.04.2 LTS (Bionic Beaver)"
# Docker
$ sudo docker version
Client:
Version: 18.09.2
API version: 1.39
Go version: go1.10.4
Git commit: 6247962
Built: Tue Feb 26 23:52:23 2019
OS/Arch: linux/amd64
Experimental: false
Server:
Engine:
Version: 18.09.2
API version: 1.39 (minimum version 1.12)
Go version: go1.10.4
Git commit: 6247962
Built: Wed Feb 13 00:24:14 2019
OS/Arch: linux/amd64
Experimental: false
실천
Go 앱
뭐, 앱의 내용은 무엇이든 좋기 때문에, 우선 http://localhost:8080/sample 로 액세스 하면 200 OK 를 JSON 형식으로 돌려주는 것을 써 둔다.
[main.go]package main
import (
"net/http"
"github.com/labstack/echo"
)
func main() {
e := echo.New()
e.GET("/sample", func(c echo.Context) error {
return c.JSON(
http.StatusOK,
struct {
Code int `json:"code"`
Text string `json:"text"`
}{
Code: http.StatusOK,
Text: http.StatusText(http.StatusOK),
},
)
})
e.Logger.Fatal(e.Start(":8080"))
}
로컬 환경에서 실행하면 ↓과 같이 8080 포트에서 기다린다.
$ go run main.go
____ __
/ __/___/ / ___
/ _// __/ _ \/ _ \
/___/\__/_//_/\___/ v3.3.10-dev
High performance, minimalist Go web framework
https://echo.labstack.com
____________________________________O/_______
O\
⇨ http server started on [::]:8080
덧붙여서, go.mod 는 이런 느낌.
[go.mod]module t01
require (
github.com/dgrijalva/jwt-go v3.2.0+incompatible // indirect
github.com/labstack/echo v3.3.10+incompatible
github.com/labstack/gommon v0.2.8 // indirect
github.com/mattn/go-colorable v0.1.1 // indirect
github.com/mattn/go-isatty v0.0.7 // indirect
github.com/valyala/fasttemplate v1.0.1 // indirect
golang.org/x/crypto v0.0.0-20190418165655-df01cb2cc480 // indirect
)
Dockerfile
다음을 참고로.
htps : // 메이 m. 코 m / @ ㅎㅎㅎ / 우신 g 고도 d ぉ ぉ 아 d ー ー ぺ え ぺ ぁ
# step 1: build
FROM golang:1.12.4-alpine3.9 as build-step
# for go mod download
RUN apk add --update --no-cache ca-certificates git
RUN mkdir /go-app
WORKDIR /go-app
COPY go.mod .
COPY go.sum .
RUN go mod download
COPY . .
RUN CGO_ENABLED=0 go build -o /go/bin/go-app
# -----------------------------------------------------------------------------
# step 2: exec
FROM scratch
COPY --from=build-step /go/bin/go-app /go/bin/go-app
ENTRYPOINT ["/go/bin/go-app"]
특기사항
■ 베이스 이미지를 「Docker Hub」로부터 취득하고 있으므로 docker login 가 필요
하지 않으면 이렇게 된다.
$ sudo docker build -t sky0621/go-app:v0.1 .
Sending build context to Docker daemon 7.168kB
Step 1/8 : FROM "1.11.9-alpine3.9" AS builder
pull access denied for 1.11.9-alpine3.9, repository does not exist or may require 'docker login'
그래서 docker login 한다.
【참고】
htp // // cs. 도 c r. jp / 도 c 케 루 후 b / 아코 응 ts. HTML
$ sudo docker login
Login with your Docker ID to push and pull images from Docker Hub. If you don't have a Docker ID, head over to https://hub.docker.com to create one.
Username: sky0621dhub
Password:
WARNING! Your password will be stored unencrypted in /home/sky0621/.docker/config.json.
Configure a credential helper to remove this warning. See
https://docs.docker.com/engine/reference/commandline/login/#credentials-store
Login Succeeded
■ "RUN apk add --update --no-cache ca-certificates git"이 없으면 RUN go mod download가 실패합니다.
Step 6/11 : RUN go mod download
---> Running in 1b5ecc7774b5
go: github.com/dgrijalva/[email protected]+incompatible: git init --bare in /go/pkg/mod/cache/vcs/11fb0427c36fe2d22a58c95464426a2d142ff24c438e1248eeb9ff450be5af41: exec: "git": executable file not found in $PATH
〜〜 省略 〜〜
go: golang.org/x/[email protected]: git init --bare in /go/pkg/mod/cache/vcs/de5fd3af413a4f3f969455ae522b4002fcb7bb4c158f339396dfc77710c9007d: exec: "git": executable file not found in $PATH
go: error loading module requirements
The command '/bin/sh -c go mod download' returned a non-zero code: 1
■ "CGO_ENABLED = 0"이 없으면 docker run이 실패합니다.
$ sudo docker run -p 80:8080 sky0621/go-app:v0.1
standard_init_linux.go:207: exec user process caused "no such file or directory"
cgo 라는 것은 Go에서 C의 코드를 호출하는 명령인 것 같다.
이것을 유효하게 하는 ( =1 ) 인가 무효로 하는 ( =0 )의 지정이 「 CGO_ENABLED 」로 디폴트에서는 유효인 것.
(단, 크로스 컴파일시는 디폴트로 무효)
유효하면 빌드 제약 조건으로 cgo가 설정됩니다.
【참고】
htps : /// g g. rg/cmd/c고/
standard_init_linux.go 의 내용은 쫓고 있지 않기 때문에, 여기에서 에러가 된 원인이라고 단정은 할 수 없지만, 빌드 제약 cgo 를 제외하는 것으로 docker run 때의 실패는 회피되었다.
빌드
사전에 docker 프로세스도 이미지도 없는 것을 확인.
$ sudo docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
$
$ sudo docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
그럼 실행.
$ ls -l
total 16
-rw-r--r-- 1 sky0621 sky0621 464 Apr 20 08:52 Dockerfile
-rw-r--r-- 1 sky0621 sky0621 420 Apr 19 08:00 go.mod
-rw-r--r-- 1 sky0621 sky0621 1895 Apr 19 08:00 go.sum
-rw-r--r-- 1 sky0621 sky0621 375 Apr 19 09:23 main.go
$
$ date
Sat Apr 20 09:11:41 JST 2019
$
$ sudo docker build -t sky0621/go-app:v0.1 .
Sending build context to Docker daemon 6.656kB
Step 1/12 : FROM golang:1.12.4-alpine3.9 as build-step
1.12.4-alpine3.9: Pulling from library/golang
bdf0201b3a05: Pull complete
38f114998adb: Pull complete
21134b1a9e68: Pull complete
cff36310a8c5: Pull complete
02f293f0b51b: Pull complete
Digest: sha256:xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
Status: Downloaded newer image for golang:1.12.4-alpine3.9
---> b97a72b8e97d
Step 2/12 : RUN apk add --update --no-cache ca-certificates git
---> Running in 0c5bb1e980c9
fetch http://dl-cdn.alpinelinux.org/alpine/v3.9/main/x86_64/APKINDEX.tar.gz
fetch http://dl-cdn.alpinelinux.org/alpine/v3.9/community/x86_64/APKINDEX.tar.gz
(1/6) Installing nghttp2-libs (1.35.1-r0)
(2/6) Installing libssh2 (1.8.2-r0)
(3/6) Installing libcurl (7.64.0-r1)
(4/6) Installing expat (2.2.6-r0)
(5/6) Installing pcre2 (10.32-r1)
(6/6) Installing git (2.20.1-r0)
Executing busybox-1.29.3-r10.trigger
OK: 20 MiB in 21 packages
Removing intermediate container 0c5bb1e980c9
---> 0625379ca405
Step 3/12 : RUN mkdir /go-app
---> Running in 82c9e6be294d
Removing intermediate container 82c9e6be294d
---> 0e99542d29eb
Step 4/12 : WORKDIR /go-app
---> Running in 7929d16e6ce4
Removing intermediate container 7929d16e6ce4
---> 2bb8099a90aa
Step 5/12 : COPY go.mod .
---> 77a7fb906751
Step 6/12 : COPY go.sum .
---> da9177c9aaa1
Step 7/12 : RUN go mod download
---> Running in a60a8f304669
go: finding github.com/labstack/echo v3.3.10+incompatible
go: finding github.com/mattn/go-colorable v0.1.1
go: finding github.com/dgrijalva/jwt-go v3.2.0+incompatible
go: finding github.com/labstack/gommon v0.2.8
go: finding github.com/mattn/go-isatty v0.0.7
go: finding github.com/valyala/fasttemplate v1.0.1
go: finding golang.org/x/crypto v0.0.0-20190418165655-df01cb2cc480
go: finding github.com/mattn/go-isatty v0.0.5
go: finding github.com/valyala/bytebufferpool v1.0.0
go: finding golang.org/x/sys v0.0.0-20190403152447-81d4e9dc473e
go: finding golang.org/x/sys v0.0.0-20190222072716-a9d3bda3a223
Removing intermediate container a60a8f304669
---> 44992184e9e2
Step 8/12 : COPY . .
---> 8e8041d6ff86
Step 9/12 : RUN CGO_ENABLED=0 go build -o /go/bin/go-app
---> Running in 1baafdb9189b
Removing intermediate container 1baafdb9189b
---> 51d15d46907b
Step 10/12 : FROM scratch
--->
Step 11/12 : COPY --from=build-step /go/bin/go-app /go/bin/go-app
---> 6031f71f0586
Step 12/12 : ENTRYPOINT ["/go/bin/go-app"]
---> Running in a27a508d1102
Removing intermediate container a27a508d1102
---> 1ecb02037408
Successfully built 1ecb02037408
Successfully tagged sky0621/go-app:v0.1
$
$ date
Sat Apr 20 09:12:23 JST 2019
걸린 시간은, 대략 「42」초. 꽤 걸립니다. .
Sat Apr 20 09:11:41 JST 2019
Sat Apr 20 09:12:23 JST 2019
이미지 확인
Go의 빌드 등에 사용한 이미지는 나름대로 크기이지만 실제로 움직이는 Go 앱의 이미지는 "8.43MB"로 경량.
$ sudo docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
sky0621/go-app v0.1 1ecb02037408 13 minutes ago 8.43MB
<none> <none> 51d15d46907b 13 minutes ago 413MB
golang 1.12.4-alpine3.9 b97a72b8e97d 7 days ago 350MB
실행
$ sudo docker run -p 80:8080 sky0621/go-app:v0.1
____ __
/ __/___/ / ___
/ _// __/ _ \/ _ \
/___/\__/_//_/\___/ v3.3.10-dev
High performance, minimalist Go web framework
https://echo.labstack.com
____________________________________O/_______
O\
⇨ http server started on [::]:8080
시작했다.
그럼 액세스.
좋아.
캐시 확인
Dockerfile의 제작에 의한 캐쉬의 효과를 확인하기 위해서, Go 앱을 미정정해 재빌드해 보자.
빌드 시간이 짧아질 것으로 기대.
Go 앱 미세 수정
접수하는 패스를 「/sample」→「/sample2」로 바꾼 만큼.
$ git diff
diff --git a/chXX_try/app/main.go b/chXX_try/app/main.go
index acb93c1..522a0e4 100644
--- a/chXX_try/app/main.go
+++ b/chXX_try/app/main.go
@@ -8,7 +8,7 @@ import (
func main() {
e := echo.New()
- e.GET("/sample", func(c echo.Context) error {
+ e.GET("/sample2", func(c echo.Context) error {
return c.JSON(
http.StatusOK,
struct {
재빌드
$ date
Sat Apr 20 09:43:21 JST 2019
$
$ sudo docker build -t sky0621/go-app:v0.2 .
Sending build context to Docker daemon 6.656kB
Step 1/12 : FROM golang:1.12.4-alpine3.9 as build-step
---> b97a72b8e97d
Step 2/12 : RUN apk add --update --no-cache ca-certificates git
---> Using cache
---> 0625379ca405
Step 3/12 : RUN mkdir /go-app
---> Using cache
---> 0e99542d29eb
Step 4/12 : WORKDIR /go-app
---> Using cache
---> 2bb8099a90aa
Step 5/12 : COPY go.mod .
---> Using cache
---> 77a7fb906751
Step 6/12 : COPY go.sum .
---> Using cache
---> da9177c9aaa1
Step 7/12 : RUN go mod download
---> Using cache
---> 44992184e9e2
Step 8/12 : COPY . .
---> c9a3ca188d54
Step 9/12 : RUN CGO_ENABLED=0 go build -o /go/bin/go-app
---> Running in 4aaa5be99f06
Removing intermediate container 4aaa5be99f06
---> f3ab3206497a
Step 10/12 : FROM scratch
--->
Step 11/12 : COPY --from=build-step /go/bin/go-app /go/bin/go-app
---> fa6b7e4787a8
Step 12/12 : ENTRYPOINT ["/go/bin/go-app"]
---> Running in d17c0c300e5b
Removing intermediate container d17c0c300e5b
---> 0b607262dca1
Successfully built 0b607262dca1
Successfully tagged sky0621/go-app:v0.2
$
$ date
Sat Apr 20 09:43:33 JST 2019
빨라지고 있다. "12"초. (첫회는 「42」초였다.)
캐시 효과, 크네요.
Sat Apr 20 09:43:21 JST 2019
Sat Apr 20 09:43:33 JST 2019
요약
단순한 앱으로 시도했을 뿐이지만, 일단 Go1.12+go mod에서의 Docker 컨테이너화는 완료.
Dockerfile에 관해서는 정기적으로 ↓ 등 재확인하지 않는다고 생각했다.
htp // // cs. 도 c r. jp/v1.9/엔기네/아르치 ぇs/도 c케 r후ぃぇ_베 stp등 c치세. HTML
Reference
이 문제에 관하여(Go1.12＋go mod로 Docker 컨테이너화), 우리는 이곳에서 더 많은 자료를 발견하고 링크를 클릭하여 보았다
https://qiita.com/sky0621/items/4c314bd07da284176a29
텍스트를 자유롭게 공유하거나 복사할 수 있습니다.하지만 이 문서의 URL은 참조 URL로 남겨 두십시오.
우수한 개발자 콘텐츠 발견에 전념
(Collection and Share based on the CC Protocol.)
#OS
$ cat /etc/os-release
NAME="Ubuntu"
VERSION="18.04.2 LTS (Bionic Beaver)"
# Docker
$ sudo docker version
Client:
Version: 18.09.2
API version: 1.39
Go version: go1.10.4
Git commit: 6247962
Built: Tue Feb 26 23:52:23 2019
OS/Arch: linux/amd64
Experimental: false
Server:
Engine:
Version: 18.09.2
API version: 1.39 (minimum version 1.12)
Go version: go1.10.4
Git commit: 6247962
Built: Wed Feb 13 00:24:14 2019
OS/Arch: linux/amd64
Experimental: false
실천
Go 앱
뭐, 앱의 내용은 무엇이든 좋기 때문에, 우선 http://localhost:8080/sample 로 액세스 하면 200 OK 를 JSON 형식으로 돌려주는 것을 써 둔다.
[main.go]package main
import (
"net/http"
"github.com/labstack/echo"
)
func main() {
e := echo.New()
e.GET("/sample", func(c echo.Context) error {
return c.JSON(
http.StatusOK,
struct {
Code int `json:"code"`
Text string `json:"text"`
}{
Code: http.StatusOK,
Text: http.StatusText(http.StatusOK),
},
)
})
e.Logger.Fatal(e.Start(":8080"))
}
로컬 환경에서 실행하면 ↓과 같이 8080 포트에서 기다린다.
$ go run main.go
____ __
/ __/___/ / ___
/ _// __/ _ \/ _ \
/___/\__/_//_/\___/ v3.3.10-dev
High performance, minimalist Go web framework
https://echo.labstack.com
____________________________________O/_______
O\
⇨ http server started on [::]:8080
덧붙여서, go.mod 는 이런 느낌.
[go.mod]module t01
require (
github.com/dgrijalva/jwt-go v3.2.0+incompatible // indirect
github.com/labstack/echo v3.3.10+incompatible
github.com/labstack/gommon v0.2.8 // indirect
github.com/mattn/go-colorable v0.1.1 // indirect
github.com/mattn/go-isatty v0.0.7 // indirect
github.com/valyala/fasttemplate v1.0.1 // indirect
golang.org/x/crypto v0.0.0-20190418165655-df01cb2cc480 // indirect
)
Dockerfile
다음을 참고로.
htps : // 메이 m. 코 m / @ ㅎㅎㅎ / 우신 g 고도 d ぉ ぉ 아 d ー ー ぺ え ぺ ぁ
# step 1: build
FROM golang:1.12.4-alpine3.9 as build-step
# for go mod download
RUN apk add --update --no-cache ca-certificates git
RUN mkdir /go-app
WORKDIR /go-app
COPY go.mod .
COPY go.sum .
RUN go mod download
COPY . .
RUN CGO_ENABLED=0 go build -o /go/bin/go-app
# -----------------------------------------------------------------------------
# step 2: exec
FROM scratch
COPY --from=build-step /go/bin/go-app /go/bin/go-app
ENTRYPOINT ["/go/bin/go-app"]
특기사항
■ 베이스 이미지를 「Docker Hub」로부터 취득하고 있으므로 docker login 가 필요
하지 않으면 이렇게 된다.
$ sudo docker build -t sky0621/go-app:v0.1 .
Sending build context to Docker daemon 7.168kB
Step 1/8 : FROM "1.11.9-alpine3.9" AS builder
pull access denied for 1.11.9-alpine3.9, repository does not exist or may require 'docker login'
그래서 docker login 한다.
【참고】
htp // // cs. 도 c r. jp / 도 c 케 루 후 b / 아코 응 ts. HTML
$ sudo docker login
Login with your Docker ID to push and pull images from Docker Hub. If you don't have a Docker ID, head over to https://hub.docker.com to create one.
Username: sky0621dhub
Password:
WARNING! Your password will be stored unencrypted in /home/sky0621/.docker/config.json.
Configure a credential helper to remove this warning. See
https://docs.docker.com/engine/reference/commandline/login/#credentials-store
Login Succeeded
■ "RUN apk add --update --no-cache ca-certificates git"이 없으면 RUN go mod download가 실패합니다.
Step 6/11 : RUN go mod download
---> Running in 1b5ecc7774b5
go: github.com/dgrijalva/[email protected]+incompatible: git init --bare in /go/pkg/mod/cache/vcs/11fb0427c36fe2d22a58c95464426a2d142ff24c438e1248eeb9ff450be5af41: exec: "git": executable file not found in $PATH
〜〜 省略 〜〜
go: golang.org/x/[email protected]: git init --bare in /go/pkg/mod/cache/vcs/de5fd3af413a4f3f969455ae522b4002fcb7bb4c158f339396dfc77710c9007d: exec: "git": executable file not found in $PATH
go: error loading module requirements
The command '/bin/sh -c go mod download' returned a non-zero code: 1
■ "CGO_ENABLED = 0"이 없으면 docker run이 실패합니다.
$ sudo docker run -p 80:8080 sky0621/go-app:v0.1
standard_init_linux.go:207: exec user process caused "no such file or directory"
cgo 라는 것은 Go에서 C의 코드를 호출하는 명령인 것 같다.
이것을 유효하게 하는 ( =1 ) 인가 무효로 하는 ( =0 )의 지정이 「 CGO_ENABLED 」로 디폴트에서는 유효인 것.
(단, 크로스 컴파일시는 디폴트로 무효)
유효하면 빌드 제약 조건으로 cgo가 설정됩니다.
【참고】
htps : /// g g. rg/cmd/c고/
standard_init_linux.go 의 내용은 쫓고 있지 않기 때문에, 여기에서 에러가 된 원인이라고 단정은 할 수 없지만, 빌드 제약 cgo 를 제외하는 것으로 docker run 때의 실패는 회피되었다.
빌드
사전에 docker 프로세스도 이미지도 없는 것을 확인.
$ sudo docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
$
$ sudo docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
그럼 실행.
$ ls -l
total 16
-rw-r--r-- 1 sky0621 sky0621 464 Apr 20 08:52 Dockerfile
-rw-r--r-- 1 sky0621 sky0621 420 Apr 19 08:00 go.mod
-rw-r--r-- 1 sky0621 sky0621 1895 Apr 19 08:00 go.sum
-rw-r--r-- 1 sky0621 sky0621 375 Apr 19 09:23 main.go
$
$ date
Sat Apr 20 09:11:41 JST 2019
$
$ sudo docker build -t sky0621/go-app:v0.1 .
Sending build context to Docker daemon 6.656kB
Step 1/12 : FROM golang:1.12.4-alpine3.9 as build-step
1.12.4-alpine3.9: Pulling from library/golang
bdf0201b3a05: Pull complete
38f114998adb: Pull complete
21134b1a9e68: Pull complete
cff36310a8c5: Pull complete
02f293f0b51b: Pull complete
Digest: sha256:xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
Status: Downloaded newer image for golang:1.12.4-alpine3.9
---> b97a72b8e97d
Step 2/12 : RUN apk add --update --no-cache ca-certificates git
---> Running in 0c5bb1e980c9
fetch http://dl-cdn.alpinelinux.org/alpine/v3.9/main/x86_64/APKINDEX.tar.gz
fetch http://dl-cdn.alpinelinux.org/alpine/v3.9/community/x86_64/APKINDEX.tar.gz
(1/6) Installing nghttp2-libs (1.35.1-r0)
(2/6) Installing libssh2 (1.8.2-r0)
(3/6) Installing libcurl (7.64.0-r1)
(4/6) Installing expat (2.2.6-r0)
(5/6) Installing pcre2 (10.32-r1)
(6/6) Installing git (2.20.1-r0)
Executing busybox-1.29.3-r10.trigger
OK: 20 MiB in 21 packages
Removing intermediate container 0c5bb1e980c9
---> 0625379ca405
Step 3/12 : RUN mkdir /go-app
---> Running in 82c9e6be294d
Removing intermediate container 82c9e6be294d
---> 0e99542d29eb
Step 4/12 : WORKDIR /go-app
---> Running in 7929d16e6ce4
Removing intermediate container 7929d16e6ce4
---> 2bb8099a90aa
Step 5/12 : COPY go.mod .
---> 77a7fb906751
Step 6/12 : COPY go.sum .
---> da9177c9aaa1
Step 7/12 : RUN go mod download
---> Running in a60a8f304669
go: finding github.com/labstack/echo v3.3.10+incompatible
go: finding github.com/mattn/go-colorable v0.1.1
go: finding github.com/dgrijalva/jwt-go v3.2.0+incompatible
go: finding github.com/labstack/gommon v0.2.8
go: finding github.com/mattn/go-isatty v0.0.7
go: finding github.com/valyala/fasttemplate v1.0.1
go: finding golang.org/x/crypto v0.0.0-20190418165655-df01cb2cc480
go: finding github.com/mattn/go-isatty v0.0.5
go: finding github.com/valyala/bytebufferpool v1.0.0
go: finding golang.org/x/sys v0.0.0-20190403152447-81d4e9dc473e
go: finding golang.org/x/sys v0.0.0-20190222072716-a9d3bda3a223
Removing intermediate container a60a8f304669
---> 44992184e9e2
Step 8/12 : COPY . .
---> 8e8041d6ff86
Step 9/12 : RUN CGO_ENABLED=0 go build -o /go/bin/go-app
---> Running in 1baafdb9189b
Removing intermediate container 1baafdb9189b
---> 51d15d46907b
Step 10/12 : FROM scratch
--->
Step 11/12 : COPY --from=build-step /go/bin/go-app /go/bin/go-app
---> 6031f71f0586
Step 12/12 : ENTRYPOINT ["/go/bin/go-app"]
---> Running in a27a508d1102
Removing intermediate container a27a508d1102
---> 1ecb02037408
Successfully built 1ecb02037408
Successfully tagged sky0621/go-app:v0.1
$
$ date
Sat Apr 20 09:12:23 JST 2019
걸린 시간은, 대략 「42」초. 꽤 걸립니다. .
Sat Apr 20 09:11:41 JST 2019
Sat Apr 20 09:12:23 JST 2019
이미지 확인
Go의 빌드 등에 사용한 이미지는 나름대로 크기이지만 실제로 움직이는 Go 앱의 이미지는 "8.43MB"로 경량.
$ sudo docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
sky0621/go-app v0.1 1ecb02037408 13 minutes ago 8.43MB
<none> <none> 51d15d46907b 13 minutes ago 413MB
golang 1.12.4-alpine3.9 b97a72b8e97d 7 days ago 350MB
실행
$ sudo docker run -p 80:8080 sky0621/go-app:v0.1
____ __
/ __/___/ / ___
/ _// __/ _ \/ _ \
/___/\__/_//_/\___/ v3.3.10-dev
High performance, minimalist Go web framework
https://echo.labstack.com
____________________________________O/_______
O\
⇨ http server started on [::]:8080
시작했다.
그럼 액세스.
좋아.
캐시 확인
Dockerfile의 제작에 의한 캐쉬의 효과를 확인하기 위해서, Go 앱을 미정정해 재빌드해 보자.
빌드 시간이 짧아질 것으로 기대.
Go 앱 미세 수정
접수하는 패스를 「/sample」→「/sample2」로 바꾼 만큼.
$ git diff
diff --git a/chXX_try/app/main.go b/chXX_try/app/main.go
index acb93c1..522a0e4 100644
--- a/chXX_try/app/main.go
+++ b/chXX_try/app/main.go
@@ -8,7 +8,7 @@ import (
func main() {
e := echo.New()
- e.GET("/sample", func(c echo.Context) error {
+ e.GET("/sample2", func(c echo.Context) error {
return c.JSON(
http.StatusOK,
struct {
재빌드
$ date
Sat Apr 20 09:43:21 JST 2019
$
$ sudo docker build -t sky0621/go-app:v0.2 .
Sending build context to Docker daemon 6.656kB
Step 1/12 : FROM golang:1.12.4-alpine3.9 as build-step
---> b97a72b8e97d
Step 2/12 : RUN apk add --update --no-cache ca-certificates git
---> Using cache
---> 0625379ca405
Step 3/12 : RUN mkdir /go-app
---> Using cache
---> 0e99542d29eb
Step 4/12 : WORKDIR /go-app
---> Using cache
---> 2bb8099a90aa
Step 5/12 : COPY go.mod .
---> Using cache
---> 77a7fb906751
Step 6/12 : COPY go.sum .
---> Using cache
---> da9177c9aaa1
Step 7/12 : RUN go mod download
---> Using cache
---> 44992184e9e2
Step 8/12 : COPY . .
---> c9a3ca188d54
Step 9/12 : RUN CGO_ENABLED=0 go build -o /go/bin/go-app
---> Running in 4aaa5be99f06
Removing intermediate container 4aaa5be99f06
---> f3ab3206497a
Step 10/12 : FROM scratch
--->
Step 11/12 : COPY --from=build-step /go/bin/go-app /go/bin/go-app
---> fa6b7e4787a8
Step 12/12 : ENTRYPOINT ["/go/bin/go-app"]
---> Running in d17c0c300e5b
Removing intermediate container d17c0c300e5b
---> 0b607262dca1
Successfully built 0b607262dca1
Successfully tagged sky0621/go-app:v0.2
$
$ date
Sat Apr 20 09:43:33 JST 2019
빨라지고 있다. "12"초. (첫회는 「42」초였다.)
캐시 효과, 크네요.
Sat Apr 20 09:43:21 JST 2019
Sat Apr 20 09:43:33 JST 2019
요약
단순한 앱으로 시도했을 뿐이지만, 일단 Go1.12+go mod에서의 Docker 컨테이너화는 완료.
Dockerfile에 관해서는 정기적으로 ↓ 등 재확인하지 않는다고 생각했다.
htp // // cs. 도 c r. jp/v1.9/엔기네/아르치 ぇs/도 c케 r후ぃぇ_베 stp등 c치세. HTML
Reference
이 문제에 관하여(Go1.12＋go mod로 Docker 컨테이너화), 우리는 이곳에서 더 많은 자료를 발견하고 링크를 클릭하여 보았다
https://qiita.com/sky0621/items/4c314bd07da284176a29
텍스트를 자유롭게 공유하거나 복사할 수 있습니다.하지만 이 문서의 URL은 참조 URL로 남겨 두십시오.
우수한 개발자 콘텐츠 발견에 전념
(Collection and Share based on the CC Protocol.)
package main
import (
"net/http"
"github.com/labstack/echo"
)
func main() {
e := echo.New()
e.GET("/sample", func(c echo.Context) error {
return c.JSON(
http.StatusOK,
struct {
Code int `json:"code"`
Text string `json:"text"`
}{
Code: http.StatusOK,
Text: http.StatusText(http.StatusOK),
},
)
})
e.Logger.Fatal(e.Start(":8080"))
}
$ go run main.go
____ __
/ __/___/ / ___
/ _// __/ _ \/ _ \
/___/\__/_//_/\___/ v3.3.10-dev
High performance, minimalist Go web framework
https://echo.labstack.com
____________________________________O/_______
O\
⇨ http server started on [::]:8080
module t01
require (
github.com/dgrijalva/jwt-go v3.2.0+incompatible // indirect
github.com/labstack/echo v3.3.10+incompatible
github.com/labstack/gommon v0.2.8 // indirect
github.com/mattn/go-colorable v0.1.1 // indirect
github.com/mattn/go-isatty v0.0.7 // indirect
github.com/valyala/fasttemplate v1.0.1 // indirect
golang.org/x/crypto v0.0.0-20190418165655-df01cb2cc480 // indirect
)
# step 1: build
FROM golang:1.12.4-alpine3.9 as build-step
# for go mod download
RUN apk add --update --no-cache ca-certificates git
RUN mkdir /go-app
WORKDIR /go-app
COPY go.mod .
COPY go.sum .
RUN go mod download
COPY . .
RUN CGO_ENABLED=0 go build -o /go/bin/go-app
# -----------------------------------------------------------------------------
# step 2: exec
FROM scratch
COPY --from=build-step /go/bin/go-app /go/bin/go-app
ENTRYPOINT ["/go/bin/go-app"]
$ sudo docker build -t sky0621/go-app:v0.1 .
Sending build context to Docker daemon 7.168kB
Step 1/8 : FROM "1.11.9-alpine3.9" AS builder
pull access denied for 1.11.9-alpine3.9, repository does not exist or may require 'docker login'
$ sudo docker login
Login with your Docker ID to push and pull images from Docker Hub. If you don't have a Docker ID, head over to https://hub.docker.com to create one.
Username: sky0621dhub
Password:
WARNING! Your password will be stored unencrypted in /home/sky0621/.docker/config.json.
Configure a credential helper to remove this warning. See
https://docs.docker.com/engine/reference/commandline/login/#credentials-store
Login Succeeded
Step 6/11 : RUN go mod download
---> Running in 1b5ecc7774b5
go: github.com/dgrijalva/[email protected]+incompatible: git init --bare in /go/pkg/mod/cache/vcs/11fb0427c36fe2d22a58c95464426a2d142ff24c438e1248eeb9ff450be5af41: exec: "git": executable file not found in $PATH
〜〜 省略 〜〜
go: golang.org/x/[email protected]: git init --bare in /go/pkg/mod/cache/vcs/de5fd3af413a4f3f969455ae522b4002fcb7bb4c158f339396dfc77710c9007d: exec: "git": executable file not found in $PATH
go: error loading module requirements
The command '/bin/sh -c go mod download' returned a non-zero code: 1
$ sudo docker run -p 80:8080 sky0621/go-app:v0.1
standard_init_linux.go:207: exec user process caused "no such file or directory"
$ sudo docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
$
$ sudo docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
$ ls -l
total 16
-rw-r--r-- 1 sky0621 sky0621 464 Apr 20 08:52 Dockerfile
-rw-r--r-- 1 sky0621 sky0621 420 Apr 19 08:00 go.mod
-rw-r--r-- 1 sky0621 sky0621 1895 Apr 19 08:00 go.sum
-rw-r--r-- 1 sky0621 sky0621 375 Apr 19 09:23 main.go
$
$ date
Sat Apr 20 09:11:41 JST 2019
$
$ sudo docker build -t sky0621/go-app:v0.1 .
Sending build context to Docker daemon 6.656kB
Step 1/12 : FROM golang:1.12.4-alpine3.9 as build-step
1.12.4-alpine3.9: Pulling from library/golang
bdf0201b3a05: Pull complete
38f114998adb: Pull complete
21134b1a9e68: Pull complete
cff36310a8c5: Pull complete
02f293f0b51b: Pull complete
Digest: sha256:xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
Status: Downloaded newer image for golang:1.12.4-alpine3.9
---> b97a72b8e97d
Step 2/12 : RUN apk add --update --no-cache ca-certificates git
---> Running in 0c5bb1e980c9
fetch http://dl-cdn.alpinelinux.org/alpine/v3.9/main/x86_64/APKINDEX.tar.gz
fetch http://dl-cdn.alpinelinux.org/alpine/v3.9/community/x86_64/APKINDEX.tar.gz
(1/6) Installing nghttp2-libs (1.35.1-r0)
(2/6) Installing libssh2 (1.8.2-r0)
(3/6) Installing libcurl (7.64.0-r1)
(4/6) Installing expat (2.2.6-r0)
(5/6) Installing pcre2 (10.32-r1)
(6/6) Installing git (2.20.1-r0)
Executing busybox-1.29.3-r10.trigger
OK: 20 MiB in 21 packages
Removing intermediate container 0c5bb1e980c9
---> 0625379ca405
Step 3/12 : RUN mkdir /go-app
---> Running in 82c9e6be294d
Removing intermediate container 82c9e6be294d
---> 0e99542d29eb
Step 4/12 : WORKDIR /go-app
---> Running in 7929d16e6ce4
Removing intermediate container 7929d16e6ce4
---> 2bb8099a90aa
Step 5/12 : COPY go.mod .
---> 77a7fb906751
Step 6/12 : COPY go.sum .
---> da9177c9aaa1
Step 7/12 : RUN go mod download
---> Running in a60a8f304669
go: finding github.com/labstack/echo v3.3.10+incompatible
go: finding github.com/mattn/go-colorable v0.1.1
go: finding github.com/dgrijalva/jwt-go v3.2.0+incompatible
go: finding github.com/labstack/gommon v0.2.8
go: finding github.com/mattn/go-isatty v0.0.7
go: finding github.com/valyala/fasttemplate v1.0.1
go: finding golang.org/x/crypto v0.0.0-20190418165655-df01cb2cc480
go: finding github.com/mattn/go-isatty v0.0.5
go: finding github.com/valyala/bytebufferpool v1.0.0
go: finding golang.org/x/sys v0.0.0-20190403152447-81d4e9dc473e
go: finding golang.org/x/sys v0.0.0-20190222072716-a9d3bda3a223
Removing intermediate container a60a8f304669
---> 44992184e9e2
Step 8/12 : COPY . .
---> 8e8041d6ff86
Step 9/12 : RUN CGO_ENABLED=0 go build -o /go/bin/go-app
---> Running in 1baafdb9189b
Removing intermediate container 1baafdb9189b
---> 51d15d46907b
Step 10/12 : FROM scratch
--->
Step 11/12 : COPY --from=build-step /go/bin/go-app /go/bin/go-app
---> 6031f71f0586
Step 12/12 : ENTRYPOINT ["/go/bin/go-app"]
---> Running in a27a508d1102
Removing intermediate container a27a508d1102
---> 1ecb02037408
Successfully built 1ecb02037408
Successfully tagged sky0621/go-app:v0.1
$
$ date
Sat Apr 20 09:12:23 JST 2019
Sat Apr 20 09:11:41 JST 2019
Sat Apr 20 09:12:23 JST 2019
$ sudo docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
sky0621/go-app v0.1 1ecb02037408 13 minutes ago 8.43MB
<none> <none> 51d15d46907b 13 minutes ago 413MB
golang 1.12.4-alpine3.9 b97a72b8e97d 7 days ago 350MB
$ sudo docker run -p 80:8080 sky0621/go-app:v0.1
____ __
/ __/___/ / ___
/ _// __/ _ \/ _ \
/___/\__/_//_/\___/ v3.3.10-dev
High performance, minimalist Go web framework
https://echo.labstack.com
____________________________________O/_______
O\
⇨ http server started on [::]:8080
$ git diff
diff --git a/chXX_try/app/main.go b/chXX_try/app/main.go
index acb93c1..522a0e4 100644
--- a/chXX_try/app/main.go
+++ b/chXX_try/app/main.go
@@ -8,7 +8,7 @@ import (
func main() {
e := echo.New()
- e.GET("/sample", func(c echo.Context) error {
+ e.GET("/sample2", func(c echo.Context) error {
return c.JSON(
http.StatusOK,
struct {
$ date
Sat Apr 20 09:43:21 JST 2019
$
$ sudo docker build -t sky0621/go-app:v0.2 .
Sending build context to Docker daemon 6.656kB
Step 1/12 : FROM golang:1.12.4-alpine3.9 as build-step
---> b97a72b8e97d
Step 2/12 : RUN apk add --update --no-cache ca-certificates git
---> Using cache
---> 0625379ca405
Step 3/12 : RUN mkdir /go-app
---> Using cache
---> 0e99542d29eb
Step 4/12 : WORKDIR /go-app
---> Using cache
---> 2bb8099a90aa
Step 5/12 : COPY go.mod .
---> Using cache
---> 77a7fb906751
Step 6/12 : COPY go.sum .
---> Using cache
---> da9177c9aaa1
Step 7/12 : RUN go mod download
---> Using cache
---> 44992184e9e2
Step 8/12 : COPY . .
---> c9a3ca188d54
Step 9/12 : RUN CGO_ENABLED=0 go build -o /go/bin/go-app
---> Running in 4aaa5be99f06
Removing intermediate container 4aaa5be99f06
---> f3ab3206497a
Step 10/12 : FROM scratch
--->
Step 11/12 : COPY --from=build-step /go/bin/go-app /go/bin/go-app
---> fa6b7e4787a8
Step 12/12 : ENTRYPOINT ["/go/bin/go-app"]
---> Running in d17c0c300e5b
Removing intermediate container d17c0c300e5b
---> 0b607262dca1
Successfully built 0b607262dca1
Successfully tagged sky0621/go-app:v0.2
$
$ date
Sat Apr 20 09:43:33 JST 2019
Sat Apr 20 09:43:21 JST 2019
Sat Apr 20 09:43:33 JST 2019
단순한 앱으로 시도했을 뿐이지만, 일단 Go1.12+go mod에서의 Docker 컨테이너화는 완료.
Dockerfile에 관해서는 정기적으로 ↓ 등 재확인하지 않는다고 생각했다.
htp // // cs. 도 c r. jp/v1.9/엔기네/아르치 ぇs/도 c케 r후ぃぇ_베 stp등 c치세. HTML
Reference
이 문제에 관하여(Go1.12＋go mod로 Docker 컨테이너화), 우리는 이곳에서 더 많은 자료를 발견하고 링크를 클릭하여 보았다 https://qiita.com/sky0621/items/4c314bd07da284176a29텍스트를 자유롭게 공유하거나 복사할 수 있습니다.하지만 이 문서의 URL은 참조 URL로 남겨 두십시오.
우수한 개발자 콘텐츠 발견에 전념
(Collection and Share based on the CC Protocol.)
좋은 웹페이지 즐겨찾기
