离线导出和导入 Docker 镜像到仓库

一时失言乱红尘 2023-06-23 13:00 53阅读 0赞

参考 Rancher 离线安装脚本，对脚本进行简化。

> 功能：通过脚本可以从一个镜像仓库（例如 harbor）导出，然后导入到另一个镜像仓库。

首先需要整理要导出的镜像列表，写入 `docker-images.txt` 中，示例如下：

10.10.10.233/develop/assets:201912161902
    10.10.10.233/develop/announcement-service:1.0.0-201911121013
    10.10.10.233/develop/batch2-service:2.1.0-201912101825
    10.10.10.233/develop/bizcardmanage-service:1.0.0-201910211755
    10.10.10.233/develop/cart2-service:2.0.0-201911121022
    10.10.10.233/develop/checkup2-service:2.1.0-201911111328
    10.10.10.233/develop/cloud-web:1.0.0-201912181654
    10.10.10.233/develop/comment-service:1.0.0-201909230900
    10.10.10.233/develop/consumer-service:1.2.0-201911111333
    10.10.10.233/develop/contract2-service:2.1.0-201912031522
    10.10.10.233/develop/course-service:1.0.0-201911121026
    10.10.10.233/develop/crm-service:8.2.0-201912121323
    10.10.10.233/develop/document-service:1.0.0-201912111648
    10.10.10.233/develop/employeemanage-service:1.1.0-201912161113
    10.10.10.233/develop/employerarchive-service:1.1.0-201910251516
    10.10.10.233/develop/files-service:1.0.0-201912181034
    10.10.10.233/develop/finance-service:1.0.0-201912181634
    10.10.10.233/develop/goods2-service:2.0.0-201912181432

然后使用下面的导出脚本，将上述所有镜像导出并打包为 `docker-images.tar.gz`：

#!/bin/bash
    list="docker-images.txt"
    images="docker-images.tar.gz"
    
    usage () { 
        echo "USAGE: $0 [--image-list docker-images.txt] [--images docker-images.tar.gz]"
        echo " [-l|--image-list path] text file with list of images; one image per line."
        echo " [-i|--images path] tar.gz generated by docker save."
        echo " [-h|--help] Usage message"
    }
    
    POSITIONAL=()
    while [[ $# -gt 0 ]]; do
        key="$1"
        case $key in
            -i|--images)
            images="$2"
            shift # past argument
            shift # past value
            ;;
            -l|--image-list)
            list="$2"
            shift # past argument
            shift # past value
            ;;
            -h|--help)
            help="true"
            shift
            ;;
            *)
            usage
            exit 1
            ;;
        esac
    done
    
    if [[ $help ]]; then
        usage
        exit 0
    fi
    
    pulled=""
    while IFS= read -r i; do
        [ -z "${i}" ] && continue
        if docker pull "${i}" > /dev/null 2>&1; then
            echo "Image pull success: ${i}"
            pulled="${pulled} ${i}"
        else
            if docker inspect "${i}" > /dev/null 2>&1; then
                pulled="${pulled} ${i}"		
            else
                echo "Image pull failed: ${i}"
            fi
        fi
    done < "${list}"
    
    echo "Creating ${images} with $(echo ${ pulled} | wc -w | tr -d '[:space:]') images"
    docker save $(echo ${ pulled}) | gzip --stdout > ${images}

将导出的镜像拷到目标服务器后，执行下面的脚本进行导入：

#!/bin/bash
    #注意修改下面的仓库地址
    reg="10.10.1.5:10080"
    lib="erp"
    images="docker-images.tar.gz"
    list="docker-images.txt"
    
    usage () { 
        echo "USAGE: $0 [--images docker-images.tar.gz]"
        echo " [-l|--image-list path] text file with list of images; one image per line."
        echo " [-i|--images path] tar.gz generated by docker save."
        echo " [-h|--help] Usage message"
    }
    
    while [[ $# -gt 0 ]]; do
        key="$1"
        case $key in
            -l|--image-list)
            list="$2"
            shift # past argument
            shift # past value
            ;;
            -i|--images)
            images="$2"
            shift # past argument
            shift # past value
            ;;
            -h|--help)
            help="true"
            shift
            ;;
            *)
            usage
            exit 1
            ;;
        esac
    done
    
    if [[ $help ]]; then
        usage
        exit 0
    fi
    
    docker load --input ${images}
    
    load_images=()
    while IFS= read -r i; do
        [ -z "${i}" ] && continue
        load_images+=("${i}");
    done < "${list}"
    
    for i in "${load_images[@]}"; do
        [ -z "${i}" ] && continue
    	image_name="${reg}/${lib}/${i##*/}"
        docker tag "${i}" "${image_name}"
        docker push "${image_name}"
    done

特别注意脚本中的 `reg="10.10.1.5:10080"` 改为要导入的镜像仓库地址。