阿里云镜像

sed -i 's/dl-cdn.alpinelinux.org/mirrors.aliyun.com/g' /etc/apk/repositories

华为镜像

sed -i "s@http://dl-cdn.alpinelinux.org/@https://mirrors.huaweicloud.com/@g" /etc/apk/repositories

科大镜像

sed -i 's/dl-cdn.alpinelinux.org/mirrors.ustc.edu.cn/g' /etc/apk/repositories