43 lines
1.2 KiB
Bash
Executable File
43 lines
1.2 KiB
Bash
Executable File
#!/bin/bash
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set -e
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# =====================
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# 参数检查
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if [[ $# -lt 2 ]]; then
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echo "用法: $0 <容器名> <镜像名> [保留备份个数]"
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echo "示例: $0 dev-env dev-env 3"
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exit 1
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fi
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CONTAINER_NAME="$1"
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IMAGE_NAME="$2"
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KEEP_BACKUPS="${3:-3}" # 默认保留 3 个
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# =====================
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TAG_LATEST="${IMAGE_NAME}:latest"
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BACKUP_TAG="${IMAGE_NAME}:backup-$(date +%Y%m%d-%H%M%S)"
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echo "📦 正在为镜像 '${TAG_LATEST}' 生成备份..."
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docker tag "${TAG_LATEST}" "${BACKUP_TAG}"
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echo "✅ 备份完成: ${BACKUP_TAG}"
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echo "📝 提交容器 '${CONTAINER_NAME}' 到镜像 '${TAG_LATEST}'..."
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docker commit "${CONTAINER_NAME}" "${TAG_LATEST}"
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echo "✅ 提交完成: ${TAG_LATEST}"
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echo "🧹 清理多余的备份，只保留最近 ${KEEP_BACKUPS} 个..."
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# 找出多余的备份镜像
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BACKUPS=$(docker images --format "{{.Repository}}:{{.Tag}} {{.CreatedAt}}" | grep "${IMAGE_NAME}:backup-" | sort -r -k2 | awk '{print $1}')
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COUNT=0
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for b in ${BACKUPS}; do
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COUNT=$((COUNT+1))
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if [ $COUNT -gt ${KEEP_BACKUPS} ]; then
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echo "🗑️ 删除旧备份: ${b}"
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docker rmi "${b}"
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fi
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done
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echo "🎉 完成！"
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docker images | grep "${IMAGE_NAME}" |