前言
最近重新优化生产环境的php镜像底包，发现打包结束后大小达到了惊人的2.04G，于是得优化优化了。
常规方案
合并RUN、分阶段构建早用过了，用过之后是2G，当前层级关系如下:
IMAGE CREATED CREATED BY SIZE COMMENT
3e573b62a639 19 seconds ago RUN /bin/sh -c bash /tmp/docker-base/php-… 831MB buildkit.dockerfile.v0
<missing> About a minute ago COPY copy /tmp/docker-base/php-nginx # bu… 11.2kB buildkit.dockerfile.v0
<missing> About a minute ago COPY /tmp/build-dest.tar.gz /tmp/build-dest.… 72.8MB buildkit.dockerfile.v0
<missing> About a minute ago ENV TZ=Asia/Shanghai COMPOSER_VERSION=1 PHP_… 0B buildkit.dockerfile.v0
<missing> 21 months ago EXPOSE map[443/tcp:{} 80/tcp:{}] 0B buildkit.dockerfile.v0
<missing> 21 months ago RUN /bin/sh -c set -x && apt-install … 5.25MB buildkit.dockerfile.v0
<missing> 21 months ago COPY conf/ /opt/docker/ # buildkit 11.3kB buildkit.dockerfile.v0
<missing> 21 months ago ENV SERVICE_NGINX_CLIENT_MAX_BODY_SIZE=50m 0B buildkit.dockerfile.v0
<missing> 21 months ago ENV WEB_PHP_SOCKET=127.0.0.1:9000 0B buildkit.dockerfile.v0
<missing> 21 months ago ENV WEB_DOCUMENT_ROOT=/app WEB_DOCUMENT_INDE… 0B buildkit.dockerfile.v0
<missing> 21 months ago CMD ["supervisord"] 0B buildkit.dockerfile.v0
<missing> 21 months ago ENTRYPOINT ["/entrypoint"] 0B buildkit.dockerfile.v0
<missing> 21 months ago EXPOSE map[9000/tcp:{}] 0B buildkit.dockerfile.v0
<missing> 21 months ago WORKDIR / 0B buildkit.dockerfile.v0
<missing> 21 months ago RUN /bin/sh -c set -x && apt-install … 227MB buildkit.dockerfile.v0
<missing> 21 months ago RUN /bin/sh -c set -x && apt-install … 262MB buildkit.dockerfile.v0
<missing> 21 months ago RUN /bin/sh -c set -x && chmod +x /opt/d… 63.7MB buildkit.dockerfile.v0
<missing> 21 months ago RUN /bin/sh -c set -x && apt-update … 186MB buildkit.dockerfile.v0
<missing> 21 months ago COPY conf/ /opt/docker/ # buildkit 58.6kB buildkit.dockerfile.v0
<missing> 21 months ago COPY /baselayout/usr/local/bin/* /usr/local/… 3.9MB buildkit.dockerfile.v0
<missing> 21 months ago COPY /baselayout/sbin/* /sbin/ # buildkit 1.29MB buildkit.dockerfile.v0
<missing> 21 months ago ENV COMPOSER_VERSION=2 0B buildkit.dockerfile.v0
<missing> 21 months ago ENV PHP_SENDMAIL_PATH=/usr/sbin/sendmail -t … 0B buildkit.dockerfile.v0
<missing> 21 months ago ENV APPLICATION_USER=application APPLICATION… 0B buildkit.dockerfile.v0
<missing> 21 months ago ENV DOCKER_CONF_HOME=/opt/docker/ LOG_STDOUT… 0B buildkit.dockerfile.v0
<missing> 21 months ago ENV TERM=xterm LANG=C.UTF-8 LC_ALL=C.UTF-8 0B buildkit.dockerfile.v0
<missing> 21 months ago LABEL maintainer=info@webdevops.io vendor=We… 0B buildkit.dockerfile.v0
<missing> 3 years ago /bin/sh -c #(nop) CMD ["php-fpm"] 0B
<missing> 3 years ago /bin/sh -c #(nop) EXPOSE 9000 0B
<missing> 3 years ago /bin/sh -c #(nop) STOPSIGNAL SIGQUIT 0B
<missing> 3 years ago /bin/sh -c set -eux; cd /usr/local/etc; if… 23.5kB
<missing> 3 years ago /bin/sh -c #(nop) WORKDIR /var/www/html 0B
<missing> 3 years ago /bin/sh -c #(nop) ENTRYPOINT ["docker-php-e… 0B
<missing> 3 years ago /bin/sh -c { echo '#!/bin/sh'; echo 'exec pk… 41B
<missing> 3 years ago /bin/sh -c #(nop) COPY multi:c1ff99c7805e8f4… 6.5kB
<missing> 3 years ago /bin/sh -c set -eux; savedAptMark="$(apt-m… 79.4MB
<missing> 3 years ago /bin/sh -c #(nop) COPY file:ce57c04b70896f77… 587B
<missing> 3 years ago /bin/sh -c set -eux; savedAptMark="$(apt-m… 13.6MB
<missing> 3 years ago /bin/sh -c #(nop) ENV PHP_SHA256=bd7c0a9bd5… 0B
<missing> 3 years ago /bin/sh -c #(nop) ENV PHP_URL=https://www.p… 0B
<missing> 3 years ago /bin/sh -c #(nop) ENV PHP_VERSION=7.1.33 0B
<missing> 3 years ago /bin/sh -c #(nop) ENV GPG_KEYS=A917B1ECDA84… 0B
<missing> 3 years ago /bin/sh -c #(nop) ENV PHP_LDFLAGS=-Wl,-O1 -… 0B
<missing> 3 years ago /bin/sh -c #(nop) ENV PHP_CPPFLAGS=-fstack-… 0B
<missing> 3 years ago /bin/sh -c #(nop) ENV PHP_CFLAGS=-fstack-pr… 0B
<missing> 3 years ago /bin/sh -c #(nop) ENV PHP_EXTRA_CONFIGURE_A… 0B
<missing> 3 years ago /bin/sh -c set -eux; mkdir -p "$PHP_INI_DIR… 0B
<missing> 3 years ago /bin/sh -c #(nop) ENV PHP_INI_DIR=/usr/loca… 0B
<missing> 3 years ago /bin/sh -c set -eux; apt-get update; apt-g… 227MB
<missing> 3 years ago /bin/sh -c #(nop) ENV PHPIZE_DEPS=autoconf … 0B
<missing> 3 years ago /bin/sh -c set -eux; { echo 'Package: php… 46B
<missing> 3 years ago /bin/sh -c #(nop) CMD ["bash"] 0B
<missing> 3 years ago /bin/sh -c #(nop) ADD file:bc8179c87c8dbb3d9… 69.2MB
3e573b62a639 19 seconds ago RUN /bin/sh -c bash /tmp/docker-base/php-… 831MB buildkit.dockerfile.v0
<missing> About a minute ago COPY copy /tmp/docker-base/php-nginx # bu… 11.2kB buildkit.dockerfile.v0
<missing> About a minute ago COPY /tmp/build-dest.tar.gz /tmp/build-dest.… 72.8MB buildkit.dockerfile.v0
<missing> About a minute ago ENV TZ=Asia/Shanghai COMPOSER_VERSION=1 PHP_… 0B buildkit.dockerfile.v0
<missing> 21 months ago EXPOSE map[443/tcp:{} 80/tcp:{}] 0B buildkit.dockerfile.v0
<missing> 21 months ago RUN /bin/sh -c set -x && apt-install … 5.25MB buildkit.dockerfile.v0
<missing> 21 months ago COPY conf/ /opt/docker/ # buildkit 11.3kB buildkit.dockerfile.v0
<missing> 21 months ago ENV SERVICE_NGINX_CLIENT_MAX_BODY_SIZE=50m 0B buildkit.dockerfile.v0
<missing> 21 months ago ENV WEB_PHP_SOCKET=127.0.0.1:9000 0B buildkit.dockerfile.v0
<missing> 21 months ago ENV WEB_DOCUMENT_ROOT=/app WEB_DOCUMENT_INDE… 0B buildkit.dockerfile.v0
<missing> 21 months ago CMD ["supervisord"] 0B buildkit.dockerfile.v0
<missing> 21 months ago ENTRYPOINT ["/entrypoint"] 0B buildkit.dockerfile.v0
<missing> 21 months ago EXPOSE map[9000/tcp:{}] 0B buildkit.dockerfile.v0
<missing> 21 months ago WORKDIR / 0B buildkit.dockerfile.v0
<missing> 21 months ago RUN /bin/sh -c set -x && apt-install … 227MB buildkit.dockerfile.v0
<missing> 21 months ago RUN /bin/sh -c set -x && apt-install … 262MB buildkit.dockerfile.v0
<missing> 21 months ago RUN /bin/sh -c set -x && chmod +x /opt/d… 63.7MB buildkit.dockerfile.v0
<missing> 21 months ago RUN /bin/sh -c set -x && apt-update … 186MB buildkit.dockerfile.v0
<missing> 21 months ago COPY conf/ /opt/docker/ # buildkit 58.6kB buildkit.dockerfile.v0
<missing> 21 months ago COPY /baselayout/usr/local/bin/* /usr/local/… 3.9MB buildkit.dockerfile.v0
<missing> 21 months ago COPY /baselayout/sbin/* /sbin/ # buildkit 1.29MB buildkit.dockerfile.v0
<missing> 21 months ago ENV COMPOSER_VERSION=2 0B buildkit.dockerfile.v0
<missing> 21 months ago ENV PHP_SENDMAIL_PATH=/usr/sbin/sendmail -t … 0B buildkit.dockerfile.v0
<missing> 21 months ago ENV APPLICATION_USER=application APPLICATION… 0B buildkit.dockerfile.v0
<missing> 21 months ago ENV DOCKER_CONF_HOME=/opt/docker/ LOG_STDOUT… 0B buildkit.dockerfile.v0
<missing> 21 months ago ENV TERM=xterm LANG=C.UTF-8 LC_ALL=C.UTF-8 0B buildkit.dockerfile.v0
<missing> 21 months ago LABEL maintainer=info@webdevops.io vendor=We… 0B buildkit.dockerfile.v0
<missing> 3 years ago /bin/sh -c #(nop) CMD ["php-fpm"] 0B
<missing> 3 years ago /bin/sh -c #(nop) EXPOSE 9000 0B
<missing> 3 years ago /bin/sh -c #(nop) STOPSIGNAL SIGQUIT 0B
<missing> 3 years ago /bin/sh -c set -eux; cd /usr/local/etc; if… 23.5kB
<missing> 3 years ago /bin/sh -c #(nop) WORKDIR /var/www/html 0B
<missing> 3 years ago /bin/sh -c #(nop) ENTRYPOINT ["docker-php-e… 0B
<missing> 3 years ago /bin/sh -c { echo '#!/bin/sh'; echo 'exec pk… 41B
<missing> 3 years ago /bin/sh -c #(nop) COPY multi:c1ff99c7805e8f4… 6.5kB
<missing> 3 years ago /bin/sh -c set -eux; savedAptMark="$(apt-m… 79.4MB
<missing> 3 years ago /bin/sh -c #(nop) COPY file:ce57c04b70896f77… 587B
<missing> 3 years ago /bin/sh -c set -eux; savedAptMark="$(apt-m… 13.6MB
<missing> 3 years ago /bin/sh -c #(nop) ENV PHP_SHA256=bd7c0a9bd5… 0B
<missing> 3 years ago /bin/sh -c #(nop) ENV PHP_URL=https://www.p… 0B
<missing> 3 years ago /bin/sh -c #(nop) ENV PHP_VERSION=7.1.33 0B
<missing> 3 years ago /bin/sh -c #(nop) ENV GPG_KEYS=A917B1ECDA84… 0B
<missing> 3 years ago /bin/sh -c #(nop) ENV PHP_LDFLAGS=-Wl,-O1 -… 0B
<missing> 3 years ago /bin/sh -c #(nop) ENV PHP_CPPFLAGS=-fstack-… 0B
<missing> 3 years ago /bin/sh -c #(nop) ENV PHP_CFLAGS=-fstack-pr… 0B
<missing> 3 years ago /bin/sh -c #(nop) ENV PHP_EXTRA_CONFIGURE_A… 0B
<missing> 3 years ago /bin/sh -c set -eux; mkdir -p "$PHP_INI_DIR… 0B
<missing> 3 years ago /bin/sh -c #(nop) ENV PHP_INI_DIR=/usr/loca… 0B
<missing> 3 years ago /bin/sh -c set -eux; apt-get update; apt-g… 227MB
<missing> 3 years ago /bin/sh -c #(nop) ENV PHPIZE_DEPS=autoconf … 0B
<missing> 3 years ago /bin/sh -c set -eux; { echo 'Package: php… 46B
<missing> 3 years ago /bin/sh -c #(nop) CMD ["bash"] 0B
<missing> 3 years ago /bin/sh -c #(nop) ADD file:bc8179c87c8dbb3d9… 69.2MB
docker-squash 方案
# set proxy
# pip install docker-squash
Collecting docker-squash
Using cached docker-squash-1.0.10.tar.gz (26 kB)
Preparing metadata (setup.py) ... done
Collecting docker
Downloading docker-6.0.1-py3-none-any.whl (147 kB)
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 147.5/147.5 kB 870.8 kB/s eta 0:00:00
Requirement already satisfied: six in /usr/lib/python3/dist-packages (from docker-squash) (1.16.0)
Collecting packaging>=14.0
Downloading packaging-23.0-py3-none-any.whl (42 kB)
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 42.7/42.7 kB 3.3 MB/s eta 0:00:00
Collecting urllib3>=1.26.0
Downloading urllib3-1.26.14-py2.py3-none-any.whl (140 kB)
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 140.6/140.6 kB 3.9 MB/s eta 0:00:00
Collecting websocket-client>=0.32.0
Downloading websocket_client-1.5.1-py3-none-any.whl (55 kB)
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 55.9/55.9 kB 3.4 MB/s eta 0:00:00
Collecting requests>=2.26.0
Downloading requests-2.28.2-py3-none-any.whl (62 kB)
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 62.8/62.8 kB 5.7 MB/s eta 0:00:00
Collecting charset-normalizer<4,>=2
Downloading charset_normalizer-3.0.1-cp311-cp311-manylinux_2_17_x86_64.manylinux2014_x86_64.whl (196 kB)
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 196.8/196.8 kB 3.6 MB/s eta 0:00:00
Collecting certifi>=2017.4.17
Downloading certifi-2022.12.7-py3-none-any.whl (155 kB)
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 155.3/155.3 kB 5.6 MB/s eta 0:00:00
Collecting idna<4,>=2.5
Downloading idna-3.4-py3-none-any.whl (61 kB)
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 61.5/61.5 kB 4.1 MB/s eta 0:00:00
Building wheels for collected packages: docker-squash
Building wheel for docker-squash (setup.py) ... done
Created wheel for docker-squash: filename=docker_squash-1.0.10-py3-none-any.whl size=25667 sha256=74d9b3fa816902cf26560e45540c405ba52a427a043f938798510dc046ddb24e
Stored in directory: /root/.cache/pip/wheels/bf/4c/6d/8fe0a674f8e78ccf25fbf24bab38be2a0e73dc8c576e289e7e
Successfully built docker-squash
Installing collected packages: charset-normalizer, websocket-client, urllib3, packaging, idna, certifi, requests, docker, docker-squash
Successfully installed certifi-2022.12.7 charset-normalizer-3.0.1 docker-6.0.1 docker-squash-1.0.10 idna-3.4 packaging-23.0 requests-2.28.2 urllib3-1.26.14 websocket-client-1.5.1
# pip install docker-squash
Collecting docker-squash
Using cached docker-squash-1.0.10.tar.gz (26 kB)
Preparing metadata (setup.py) ... done
Collecting docker
Downloading docker-6.0.1-py3-none-any.whl (147 kB)
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 147.5/147.5 kB 870.8 kB/s eta 0:00:00
Requirement already satisfied: six in /usr/lib/python3/dist-packages (from docker-squash) (1.16.0)
Collecting packaging>=14.0
Downloading packaging-23.0-py3-none-any.whl (42 kB)
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 42.7/42.7 kB 3.3 MB/s eta 0:00:00
Collecting urllib3>=1.26.0
Downloading urllib3-1.26.14-py2.py3-none-any.whl (140 kB)
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 140.6/140.6 kB 3.9 MB/s eta 0:00:00
Collecting websocket-client>=0.32.0
Downloading websocket_client-1.5.1-py3-none-any.whl (55 kB)
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 55.9/55.9 kB 3.4 MB/s eta 0:00:00
Collecting requests>=2.26.0
Downloading requests-2.28.2-py3-none-any.whl (62 kB)
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 62.8/62.8 kB 5.7 MB/s eta 0:00:00
Collecting charset-normalizer<4,>=2
Downloading charset_normalizer-3.0.1-cp311-cp311-manylinux_2_17_x86_64.manylinux2014_x86_64.whl (196 kB)
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 196.8/196.8 kB 3.6 MB/s eta 0:00:00
Collecting certifi>=2017.4.17
Downloading certifi-2022.12.7-py3-none-any.whl (155 kB)
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 155.3/155.3 kB 5.6 MB/s eta 0:00:00
Collecting idna<4,>=2.5
Downloading idna-3.4-py3-none-any.whl (61 kB)
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 61.5/61.5 kB 4.1 MB/s eta 0:00:00
Building wheels for collected packages: docker-squash
Building wheel for docker-squash (setup.py) ... done
Created wheel for docker-squash: filename=docker_squash-1.0.10-py3-none-any.whl size=25667 sha256=74d9b3fa816902cf26560e45540c405ba52a427a043f938798510dc046ddb24e
Stored in directory: /root/.cache/pip/wheels/bf/4c/6d/8fe0a674f8e78ccf25fbf24bab38be2a0e73dc8c576e289e7e
Successfully built docker-squash
Installing collected packages: charset-normalizer, websocket-client, urllib3, packaging, idna, certifi, requests, docker, docker-squash
Successfully installed certifi-2022.12.7 charset-normalizer-3.0.1 docker-6.0.1 docker-squash-1.0.10 idna-3.4 packaging-23.0 requests-2.28.2 urllib3-1.26.14 websocket-client-1.5.1
准备进行优化:
# docker-squash -t base-php-7.1-squash:1.1.7 base-php-7.1-2G:1.1.7
2023-02-24 22:33:33,760 root INFO docker-squash version 1.0.10, Docker bc3805a, API 1.42...
2023-02-24 22:33:33,760 root INFO Using v2 image format
2023-02-24 22:33:33,764 root INFO Old image has 53 layers
2023-02-24 22:33:33,764 root INFO Checking if squashing is necessary...
2023-02-24 22:33:33,764 root INFO Attempting to squash last 53 layers...
2023-02-24 22:33:33,764 root INFO Saving image sha256:3e573b62a639a01409f89fb5720874eb218c8d73ec6dc749cd17f51e63b2dc7c to /tmp/docker-squash-k32ulr5j/old directory...
2023-02-24 22:33:55,048 root INFO Image saved!
2023-02-24 22:33:55,049 root INFO Squashing image 'base-php-7.1-2G:1.1.7'...
2023-02-24 22:33:55,049 root INFO Starting squashing...
2023-02-24 22:33:55,049 root INFO Squashing file '/tmp/docker-squash-k32ulr5j/old/d7d46762cc297b1c03ff1a2357aab70954f1c80b8d0a230bebf3d7c29dad7a4c/layer.tar'...
2023-02-24 22:34:01,168 root INFO Squashing file '/tmp/docker-squash-k32ulr5j/old/6436c80cffc9be2881afd8aa9dc0cc191459b202c31939246e4222a8ce795395/layer.tar'...
2023-02-24 22:34:01,176 root INFO Squashing file '/tmp/docker-squash-k32ulr5j/old/3f33ad03c12966629fdc589b6ed27d819599a44b68b3a039c18ddcb5b8b82ac1/layer.tar'...
2023-02-24 22:34:01,177 root INFO Squashing file '/tmp/docker-squash-k32ulr5j/old/168f6de8010549669d1a88808f85396b0a7eacce168a58957ca829690a5f4f61/layer.tar'...
2023-02-24 22:34:01,342 root INFO Squashing file '/tmp/docker-squash-k32ulr5j/old/db9ac6abca04b9028fdcc5b66fff016680ff98899b337270afbf6cbdbfc76a2b/layer.tar'...
2023-02-24 22:34:01,367 root INFO Squashing file '/tmp/docker-squash-k32ulr5j/old/95d4d031a815f6b8197c842c329c44daa1d9d88c7cac4dadf9c28357bf872b6e/layer.tar'...
2023-02-24 22:34:07,352 root INFO Squashing file '/tmp/docker-squash-k32ulr5j/old/8c4f084f8191aa8c0927cfdf581e8d719798f3ef4dc0a2386a4e018a9b775209/layer.tar'...
2023-02-24 22:34:10,975 root INFO Squashing file '/tmp/docker-squash-k32ulr5j/old/2a54ddc0509cc4a48524448868b7fbe380374f0875eb4b3a93d7dc660bee8683/layer.tar'...
2023-02-24 22:34:15,229 root INFO Squashing file '/tmp/docker-squash-k32ulr5j/old/cf4d71af881787d5043c24fed2dd6f4999373ef502ab7c87981a991d5875aaf5/layer.tar'...
2023-02-24 22:34:23,360 root INFO Squashing file '/tmp/docker-squash-k32ulr5j/old/656eb7321b45da46edb991ec9fd59d389924ddabcdcee027c73885395b818428/layer.tar'...
2023-02-24 22:34:23,497 root INFO Squashing file '/tmp/docker-squash-k32ulr5j/old/95b6cf2efba2ef1695d497f2ffc14a015740dd885e913e714644029b04872ea8/layer.tar'...
2023-02-24 22:34:23,525 root INFO Squashing file '/tmp/docker-squash-k32ulr5j/old/d783eb2e7ab038dc59cc7772d475f9df18a3b652d9482b3ea67acf710e341d55/layer.tar'...
2023-02-24 22:34:23,527 root INFO Squashing file '/tmp/docker-squash-k32ulr5j/old/57fdde3a115d6114ff918bcac970556e5b1715f490465972f5c54a4dcde45d97/layer.tar'...
2023-02-24 22:34:23,536 root INFO Squashing file '/tmp/docker-squash-k32ulr5j/old/b98a47b9051512684568d7abf6a9beaffff96dad929f694e01093ee337110a13/layer.tar'...
2023-02-24 22:34:23,540 root INFO Squashing file '/tmp/docker-squash-k32ulr5j/old/54408f0778c0839f22489b6b9914dd3091fa1d88c2bac71d39e995d47deb8a43/layer.tar'...
2023-02-24 22:34:23,550 root INFO Squashing file '/tmp/docker-squash-k32ulr5j/old/106d139f6c74932f4bdf47b00822b5ea4883c08d9060ce0f205445aa503fabae/layer.tar'...
2023-02-24 22:34:24,544 root INFO Squashing file '/tmp/docker-squash-k32ulr5j/old/5a1105e30d49740e7c6afe737ee00f20a08070d6e875444dff2a897d36c01eba/layer.tar'...
2023-02-24 22:34:24,550 root INFO Squashing file '/tmp/docker-squash-k32ulr5j/old/1a9a39fbf6ea49da925bbc75f302a58d7d44590ea608d8ceab301055ecfec424/layer.tar'...
2023-02-24 22:34:24,630 root INFO Squashing file '/tmp/docker-squash-k32ulr5j/old/2e5075944c7b2ac85a5a4a0fa7212d864d0bb5459e77e3b1a9d4805f09f0df6e/layer.tar'...
2023-02-24 22:34:24,639 root INFO Squashing file '/tmp/docker-squash-k32ulr5j/old/79723537f336a4d1115385f6deac1b0d25b62cdaea8754ac389f4be419697e19/layer.tar'...
2023-02-24 22:34:31,657 root INFO Squashing file '/tmp/docker-squash-k32ulr5j/old/4361b4f5721d7fc518dfea958d4b48896224f98cd3ab3d32d364a17718fb097d/layer.tar'...
2023-02-24 22:34:31,664 root INFO Squashing file '/tmp/docker-squash-k32ulr5j/old/9fde44fc6eae246204fa66494744c78cf4cb46ad9fd60872c75a15372995651d/layer.tar'...
2023-02-24 22:34:41,220 root INFO Squashing finished!
2023-02-24 22:34:42,236 root INFO Original image size: 1984.78 MB
2023-02-24 22:34:42,236 root INFO Squashed image size: 1243.55 MB
2023-02-24 22:34:42,236 root INFO Image size decreased by 37.35 %
2023-02-24 22:34:42,236 root INFO New squashed image ID is da5706696dda3bbde3e1d2916a76b16f73c6089dfd9fc4763115f032f1810857
2023-02-24 22:34:54,088 root INFO Image registered in Docker daemon as base-php-7.1-squash:1.1.7
2023-02-24 22:34:54,231 root INFO Done
2023-02-24 22:33:33,760 root INFO docker-squash version 1.0.10, Docker bc3805a, API 1.42...
2023-02-24 22:33:33,760 root INFO Using v2 image format
2023-02-24 22:33:33,764 root INFO Old image has 53 layers
2023-02-24 22:33:33,764 root INFO Checking if squashing is necessary...
2023-02-24 22:33:33,764 root INFO Attempting to squash last 53 layers...
2023-02-24 22:33:33,764 root INFO Saving image sha256:3e573b62a639a01409f89fb5720874eb218c8d73ec6dc749cd17f51e63b2dc7c to /tmp/docker-squash-k32ulr5j/old directory...
2023-02-24 22:33:55,048 root INFO Image saved!
2023-02-24 22:33:55,049 root INFO Squashing image 'base-php-7.1-2G:1.1.7'...
2023-02-24 22:33:55,049 root INFO Starting squashing...
2023-02-24 22:33:55,049 root INFO Squashing file '/tmp/docker-squash-k32ulr5j/old/d7d46762cc297b1c03ff1a2357aab70954f1c80b8d0a230bebf3d7c29dad7a4c/layer.tar'...
2023-02-24 22:34:01,168 root INFO Squashing file '/tmp/docker-squash-k32ulr5j/old/6436c80cffc9be2881afd8aa9dc0cc191459b202c31939246e4222a8ce795395/layer.tar'...
2023-02-24 22:34:01,176 root INFO Squashing file '/tmp/docker-squash-k32ulr5j/old/3f33ad03c12966629fdc589b6ed27d819599a44b68b3a039c18ddcb5b8b82ac1/layer.tar'...
2023-02-24 22:34:01,177 root INFO Squashing file '/tmp/docker-squash-k32ulr5j/old/168f6de8010549669d1a88808f85396b0a7eacce168a58957ca829690a5f4f61/layer.tar'...
2023-02-24 22:34:01,342 root INFO Squashing file '/tmp/docker-squash-k32ulr5j/old/db9ac6abca04b9028fdcc5b66fff016680ff98899b337270afbf6cbdbfc76a2b/layer.tar'...
2023-02-24 22:34:01,367 root INFO Squashing file '/tmp/docker-squash-k32ulr5j/old/95d4d031a815f6b8197c842c329c44daa1d9d88c7cac4dadf9c28357bf872b6e/layer.tar'...
2023-02-24 22:34:07,352 root INFO Squashing file '/tmp/docker-squash-k32ulr5j/old/8c4f084f8191aa8c0927cfdf581e8d719798f3ef4dc0a2386a4e018a9b775209/layer.tar'...
2023-02-24 22:34:10,975 root INFO Squashing file '/tmp/docker-squash-k32ulr5j/old/2a54ddc0509cc4a48524448868b7fbe380374f0875eb4b3a93d7dc660bee8683/layer.tar'...
2023-02-24 22:34:15,229 root INFO Squashing file '/tmp/docker-squash-k32ulr5j/old/cf4d71af881787d5043c24fed2dd6f4999373ef502ab7c87981a991d5875aaf5/layer.tar'...
2023-02-24 22:34:23,360 root INFO Squashing file '/tmp/docker-squash-k32ulr5j/old/656eb7321b45da46edb991ec9fd59d389924ddabcdcee027c73885395b818428/layer.tar'...
2023-02-24 22:34:23,497 root INFO Squashing file '/tmp/docker-squash-k32ulr5j/old/95b6cf2efba2ef1695d497f2ffc14a015740dd885e913e714644029b04872ea8/layer.tar'...
2023-02-24 22:34:23,525 root INFO Squashing file '/tmp/docker-squash-k32ulr5j/old/d783eb2e7ab038dc59cc7772d475f9df18a3b652d9482b3ea67acf710e341d55/layer.tar'...
2023-02-24 22:34:23,527 root INFO Squashing file '/tmp/docker-squash-k32ulr5j/old/57fdde3a115d6114ff918bcac970556e5b1715f490465972f5c54a4dcde45d97/layer.tar'...
2023-02-24 22:34:23,536 root INFO Squashing file '/tmp/docker-squash-k32ulr5j/old/b98a47b9051512684568d7abf6a9beaffff96dad929f694e01093ee337110a13/layer.tar'...
2023-02-24 22:34:23,540 root INFO Squashing file '/tmp/docker-squash-k32ulr5j/old/54408f0778c0839f22489b6b9914dd3091fa1d88c2bac71d39e995d47deb8a43/layer.tar'...
2023-02-24 22:34:23,550 root INFO Squashing file '/tmp/docker-squash-k32ulr5j/old/106d139f6c74932f4bdf47b00822b5ea4883c08d9060ce0f205445aa503fabae/layer.tar'...
2023-02-24 22:34:24,544 root INFO Squashing file '/tmp/docker-squash-k32ulr5j/old/5a1105e30d49740e7c6afe737ee00f20a08070d6e875444dff2a897d36c01eba/layer.tar'...
2023-02-24 22:34:24,550 root INFO Squashing file '/tmp/docker-squash-k32ulr5j/old/1a9a39fbf6ea49da925bbc75f302a58d7d44590ea608d8ceab301055ecfec424/layer.tar'...
2023-02-24 22:34:24,630 root INFO Squashing file '/tmp/docker-squash-k32ulr5j/old/2e5075944c7b2ac85a5a4a0fa7212d864d0bb5459e77e3b1a9d4805f09f0df6e/layer.tar'...
2023-02-24 22:34:24,639 root INFO Squashing file '/tmp/docker-squash-k32ulr5j/old/79723537f336a4d1115385f6deac1b0d25b62cdaea8754ac389f4be419697e19/layer.tar'...
2023-02-24 22:34:31,657 root INFO Squashing file '/tmp/docker-squash-k32ulr5j/old/4361b4f5721d7fc518dfea958d4b48896224f98cd3ab3d32d364a17718fb097d/layer.tar'...
2023-02-24 22:34:31,664 root INFO Squashing file '/tmp/docker-squash-k32ulr5j/old/9fde44fc6eae246204fa66494744c78cf4cb46ad9fd60872c75a15372995651d/layer.tar'...
2023-02-24 22:34:41,220 root INFO Squashing finished!
2023-02-24 22:34:42,236 root INFO Original image size: 1984.78 MB
2023-02-24 22:34:42,236 root INFO Squashed image size: 1243.55 MB
2023-02-24 22:34:42,236 root INFO Image size decreased by 37.35 %
2023-02-24 22:34:42,236 root INFO New squashed image ID is da5706696dda3bbde3e1d2916a76b16f73c6089dfd9fc4763115f032f1810857
2023-02-24 22:34:54,088 root INFO Image registered in Docker daemon as base-php-7.1-squash:1.1.7
2023-02-24 22:34:54,231 root INFO Done
优化后的层级和大小，效果很好，而且层级也没了，反正是底包，关系不大
# docker history base-php-7.1-squash:1.1.7
IMAGE CREATED CREATED BY SIZE COMMENT
da5706696dda About a minute ago 1.28GB
IMAGE CREATED CREATED BY SIZE COMMENT
da5706696dda About a minute ago 1.28GB
官方docker build --squash的选项
REPOSITORY TAG IMAGE ID CREATED SIZE
base-php-7.1 1.1.7 fc3b0139110b 9 minutes ago 2.04GB
base-php-7.1 1.1.7 fc3b0139110b 9 minutes ago 2.04GB
处理完后居然没有任何效果！！！
问了一下AI,居然要我清理缓存，虽然可以，不过我内心已经放弃了这个方案
总结
docker底包层级优化使用
docker-squash简单快捷，毕竟使用缓存还是很有必要的
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