如果你自己构建这些修剪过的映像(从其他一些较旧的基础映像)，请谨慎使用上述基于docker image prune的可接受解决方案，因为该命令是生硬的，并将尝试删除最新映像所需的所有依赖关系(该命令可能应该重命名为docker image*s* prune)。

我为我的docker映像构建管道(其中有每日构建和标签=日期YYYYMMDD格式)提出的解决方案是:

# carefully narrow down the image to be deleted (to avoid removing useful static stuff like base images)
my_deleted_image=mirekphd/ml-cpu-py37-vsc-cust

# define the monitored image (tested for obsolescence), which will be usually the same as deleted one, unless deleting some very infrequently built image which requires a separate "clock"
monitored_image=mirekphd/ml-cache

# calculate the oldest acceptable tag (date)
date_week_ago=$(date -d "last week" '+%Y%m%d')

# get the IDs of obsolete tags of our deleted image
# note we use monitored_image to test for obsolescence
my_deleted_image_obsolete_tag_ids=$(docker images --filter="before=$monitored_image:$date_week_ago" | grep $my_deleted_image | awk '{print $3}')

# remove the obsolete tags of the deleted image
# (note it typically has to be forced using -f switch)
docker rmi -f $my_deleted_image_obsolete_tag_ids

假设你有Docker 1.13或更高版本，你可以只使用修剪命令。对于你的问题，特别是关于删除旧图像，你想要第一个。

# Remove unused images
docker image prune

# Remove stopped containers.
docker container prune

# Remove unused volumes
docker volume prune

# Remove unused networks
docker network prune

# Command to run all prunes:
docker system prune

我建议不要习惯使用docker系统的prune命令。我认为用户会不小心删除他们不想删除的内容。就我个人而言，我将主要使用docker映像修剪和docker容器修剪命令。

下面的命令将帮助从本地存储库中删除所有未使用的和旧的映像 ==> docker系统剪枝——全部

我最近写了一个脚本在我的服务器上解决这个问题:

#!/bin/bash

# Remove all the dangling images
DANGLING_IMAGES=$(docker images -qf "dangling=true")
if [[ -n $DANGLING_IMAGES ]]; then
    docker rmi "$DANGLING_IMAGES"
fi

# Get all the images currently in use
USED_IMAGES=($( \
    docker ps -a --format '{{.Image}}' | \
    sort -u | \
    uniq | \
    awk -F ':' '$2{print $1":"$2}!$2{print $1":latest"}' \
))

# Get all the images currently available
ALL_IMAGES=($( \
    docker images --format '{{.Repository}}:{{.Tag}}' | \
    sort -u \
))

# Remove the unused images
for i in "${ALL_IMAGES[@]}"; do
    UNUSED=true
    for j in "${USED_IMAGES[@]}"; do
        if [[ "$i" == "$j" ]]; then
            UNUSED=false
        fi
    done
    if [[ "$UNUSED" == true ]]; then
        docker rmi "$i"
    fi
done

根据文档，下面的命令将删除超过48小时的图像。

$ docker image prune --all --filter until=48h

Occasionally I have run into issues where Docker will allocate and continue to use disk space, even when the space is not allocated to any particular image or existing container. The latest way I generated this issue accidentally was using "docker-engine" centos build instead of "docker" in RHEL 7.1. What seems to happen is sometimes the container clean-ups are not completed successfully and then the space is never reused. When the 80GB drive I allocated as / was filled with /var/lib/docker files I had to come up with a creative way to resolve the issue.

这是我想到的。首先解决磁盘满的错误:

Stop docker: systemctl Stop docker 分配一个新的驱动器挂载为say /mnt/docker。 移动/var/lib/docker目录下的所有文件到/mnt/docker目录下。我使用命令: rsync -aPHSx——remove-source-files /var/lib/docker/ /mnt/docker/ 将新驱动器挂载到/var/lib/docker。

此时，我不再有磁盘满的错误，但我仍然浪费了大量的空间。接下来的步骤就是解决这个问题。

Start Docker: systemctl Start Docker 保存所有图片: 码头工人节省$(码头工人图片| sed - e ' / ^ <无> / d ' - e / ^库/ d - e的年代 ,[ ][ ]*,:,' - e ' s ,[ ].*,,') > / 根/ docker.img 卸载码头工人。 删除/var/lib/docker中的所有内容: Rm -rf /var/lib/docker/[cdintv]* 重新安装码头工人 启用docker: systemctl Enable docker 启动docker: systemctl Start docker 恢复图片: Docker load < /root/docker.img 启动任何需要运行的持久容器。

这使我的磁盘使用量从docker的67 GB下降到6 GB。

我不建议日常使用。但是，当docker由于软件错误或意外重启而失去使用磁盘空间的跟踪时，运行它是有用的。