1 背景
升级了docker版本，发现在构建镜像过程中，docker没有输出echo, ls, pwd等类似命令结果，并且没有输出构建过程。
老版本的docker则没有这个问题（具体哪个版本没有深究）
2 目标
在docker构建任意镜像时，可以控制是否输出调试日志
3 解决方案
3.1 方案一 （不推荐）
docker build增加DOCKER_BUILDKIT参数
譬如这么执行构建命令：DOCKER_BUILDKIT=0 docker build .
3.2 方案二 （强烈推荐）
docker build增加--progress=plain参数
譬如这么执行构建命令：docker build --no-cache --progress=plain .
4 测试日志
dockerfile测试文件如下：
FROM ubuntu:22.04
RUN echo "aa"
RUN ls -ll
4.1 不使用任何参数构建镜像日志
[root@8f7059cd1fc5 ~/test-dockerfile]# docker build .
[+] Building 33.7s (7/7) FINISHED docker:default
=> [internal] load build definition from Dockerfile 0.0s
=> => transferring dockerfile: 80B 0.0s
=> [internal] load .dockerignore 0.0s
=> => transferring context: 2B 0.0s
=> [internal] load metadata for docker.io/library/ubuntu:22.04 30.7s
=> [ 1/33] FROM docker.io/library/ubuntu:22.04@sha256:aabed3296a3d45cede1dc866a24476c4d7e093aa806263c27ddaadbdce3c1054 403.8s
=> => resolve docker.io/library/ubuntu:22.04@sha256:aabed3296a3d45cede1dc866a24476c4d7e093aa806263c27ddaadbdce3c1054 30.9s
=> => sha256:aabed3296a3d45cede1dc866a24476c4d7e093aa806263c27ddaadbdce3c1054 1.13kB / 1.13kB 0.0s
=> => sha256:b492494d8e0113c4ad3fe4528a4b5ff89faa5331f7d52c5c138196f69ce176a6 424B / 424B 0.0s
=> => sha256:c6b84b685f35f1a5d63661f5d4aa662ad9b7ee4f4b8c394c022f25023c907b65 2.30kB / 2.30kB 0.0s
=> => sha256:445a6a12be2be54b4da18d7c77d4a41bc4746bc422f1f4325a60ff4fc7ea2e5d 29.54MB / 29.54MB 370.0s
=> => extracting sha256:445a6a12be2be54b4da18d7c77d4a41bc4746bc422f1f4325a60ff4fc7ea2e5d 2.5s
=> [2/3] RUN echo "aa" 2.4s
=> [3/3] RUN ls -ll 0.4s
=> exporting to image 0.0s
=> => exporting layers 0.0s
=> => writing image sha256:d44fb2351af002391cb8e1082161b9b62cb1f5d09d2d86d896fa3d39e6813631 0.0s
[root@8f7059cd1fc5 ~/test-dockerfile]#
4.2 使用DOCKER_BUILDKIT参数构建镜像日志
[root@8f7059cd1fc5 ~/test-dockerfile]#
[root@8f7059cd1fc5 ~/test-dockerfile]# DOCKER_BUILDKIT=0 docker build --no-cache .
DEPRECATED: The legacy builder is deprecated and will be removed in a future release.
BuildKit is currently disabled; enable it by removing the DOCKER_BUILDKIT=0
environment-variable.
Sending build context to Docker daemon 2.048kB
Step 1/3 : FROM ubuntu:22.04
22.04: Pulling from library/ubuntu
445a6a12be2b: Already exists
Digest: sha256:aabed3296a3d45cede1dc866a24476c4d7e093aa806263c27ddaadbdce3c1054
Status: Downloaded newer image for ubuntu:22.04
---> c6b84b685f35
Step 2/3 : RUN echo "aa"
---> Running in 0482ec8dc4d8
aa
Removing intermediate container 0482ec8dc4d8
---> dbd1157070f6
Step 3/3 : RUN ls -ll
---> Running in cb136517b1e9
total 48
lrwxrwxrwx 1 root root 7 Aug 16 02:02 bin -> usr/bin
drwxr-xr-x 2 root root 4096 Apr 18 2022 boot
drwxr-xr-x 5 root root 340 Sep 28 03:28 dev
drwxr-xr-x 1 root root 4096 Sep 28 03:28 etc
drwxr-xr-x 2 root root 4096 Apr 18 2022 home
lrwxrwxrwx 1 root root 7 Aug 16 02:02 lib -> usr/lib
lrwxrwxrwx 1 root root 9 Aug 16 02:02 lib32 -> usr/lib32
lrwxrwxrwx 1 root root 9 Aug 16 02:02 lib64 -> usr/lib64
lrwxrwxrwx 1 root root 10 Aug 16 02:02 libx32 -> usr/libx32
drwxr-xr-x 2 root root 4096 Aug 16 02:03 media
drwxr-xr-x 2 root root 4096 Aug 16 02:03 mnt
drwxr-xr-x 2 root root 4096 Aug 16 02:03 opt
dr-xr-xr-x 365 root root 0 Sep 28 03:28 proc
drwx------ 2 root root 4096 Aug 16 02:06 root
drwxr-xr-x 5 root root 4096 Aug 16 02:06 run
lrwxrwxrwx 1 root root 8 Aug 16 02:02 sbin -> usr/sbin
drwxr-xr-x 2 root root 4096 Aug 16 02:03 srv
dr-xr-xr-x 13 root root 0 Sep 28 03:28 sys
drwxrwxrwt 2 root root 4096 Aug 16 02:06 tmp
drwxr-xr-x 14 root root 4096 Aug 16 02:03 usr
drwxr-xr-x 11 root root 4096 Aug 16 02:06 var
Removing intermediate container cb136517b1e9
---> 37eb405c7449
Successfully built 37eb405c7449
4.3 使用–progress=plain参数构建镜像日志
[root@8f7059cd1fc5 ~/test-dockerfile]# docker build --no-cache --progress=plain .
#0 building with "default" instance using docker driver
#1 [internal] load build definition from Dockerfile
#1 transferring dockerfile: 80B done
#1 DONE 0.1s
#2 [internal] load .dockerignore
#2 transferring context: 2B done
#2 DONE 0.1s
#3 [internal] load metadata for docker.io/library/ubuntu:22.04
#3 DONE 31.5s
#4 [ 1/33] FROM docker.io/library/ubuntu:22.04@sha256:aabed3296a3d45cede1dc866a24476c4d7e093aa806263c27ddaadbdce3c1054
#4 resolve docker.io/library/ubuntu:22.04@sha256:aabed3296a3d45cede1dc866a24476c4d7e093aa806263c27ddaadbdce3c1054 30.9s done
#4 sha256:aabed3296a3d45cede1dc866a24476c4d7e093aa806263c27ddaadbdce3c1054 1.13kB / 1.13kB done
#4 sha256:b492494d8e0113c4ad3fe4528a4b5ff89faa5331f7d52c5c138196f69ce176a6 424B / 424B done
#4 sha256:c6b84b685f35f1a5d63661f5d4aa662ad9b7ee4f4b8c394c022f25023c907b65 2.30kB / 2.30kB done
#4 sha256:445a6a12be2be54b4da18d7c77d4a41bc4746bc422f1f4325a60ff4fc7ea2e5d 29.54MB / 29.54MB 370.0s done
#4 extracting sha256:445a6a12be2be54b4da18d7c77d4a41bc4746bc422f1f4325a60ff4fc7ea2e5d 2.5s done
#4 DONE 403.8s
#5 [2/3] RUN echo "aa"
#5 0.491 aa
#5 DONE 0.5s
#6 [3/3] RUN ls -ll
#6 0.450 total 48
#6 0.450 lrwxrwxrwx 1 root root 7 Aug 16 02:02 bin -> usr/bin
#6 0.450 drwxr-xr-x 2 root root 4096 Apr 18 2022 boot
#6 0.450 drwxr-xr-x 5 root root 340 Sep 28 03:26 dev
#6 0.450 drwxr-xr-x 32 root root 4096 Aug 16 02:06 etc
#6 0.450 drwxr-xr-x 2 root root 4096 Apr 18 2022 home
#6 0.450 lrwxrwxrwx 1 root root 7 Aug 16 02:02 lib -> usr/lib
#6 0.450 lrwxrwxrwx 1 root root 9 Aug 16 02:02 lib32 -> usr/lib32
#6 0.450 lrwxrwxrwx 1 root root 9 Aug 16 02:02 lib64 -> usr/lib64
#6 0.450 lrwxrwxrwx 1 root root 10 Aug 16 02:02 libx32 -> usr/libx32
#6 0.450 drwxr-xr-x 2 root root 4096 Aug 16 02:03 media
#6 0.450 drwxr-xr-x 2 root root 4096 Aug 16 02:03 mnt
#6 0.450 drwxr-xr-x 2 root root 4096 Aug 16 02:03 opt
#6 0.450 dr-xr-xr-x 381 root root 0 Sep 28 03:26 proc
#6 0.450 drwx------ 2 root root 4096 Aug 16 02:06 root
#6 0.450 drwxr-xr-x 5 root root 4096 Aug 16 02:06 run
#6 0.450 lrwxrwxrwx 1 root root 8 Aug 16 02:02 sbin -> usr/sbin
#6 0.450 drwxr-xr-x 2 root root 4096 Aug 16 02:03 srv
#6 0.450 dr-xr-xr-x 13 root root 0 Sep 28 03:26 sys
#6 0.450 drwxrwxrwt 2 root root 4096 Aug 16 02:06 tmp
#6 0.450 drwxr-xr-x 14 root root 4096 Aug 16 02:03 usr
#6 0.450 drwxr-xr-x 11 root root 4096 Aug 16 02:06 var
#6 DONE 0.5s
#7 exporting to image
#7 exporting layers done
#7 writing image sha256:4ad0b974d54190047ad7719c848a762fee837653458e13d23e7c8134bd9832a3 done
#7 DONE 0.0s
[root@8f7059cd1fc5 ~/test-dockerfile]#
原文始发于微信公众号（GousterCloud）：解决docker build不输出echo内容，不打印构建过程问题
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