Errors: 15 distinct packages available when making an Alpine Linux image

1. Execute error reporting

Execute docker build -t image:version -f Dockerfile .

Error:

2. Check online solutions 

Online documentation solutions:

Here I made a change to write these into the dockerfile

Added a few RUN

RUN rm -rf /var/cache/apk
RUN mkdir -p /var/cache/apk
RUN apk update -v

 Found still reported the same error

 3. My troubleshooting

3.1. Directly enter the underlying image

# 拉去镜像并进入容器
docker pull alpine:latest
docker exec -it alpine:latest  bash
# 手动测试
apk update -v   # 测试失败
# 再次测试
rm -rf /var/cache/apk
mkdir -p /var/cache/apk
apk update -v # 还是失败

## 突然想到这边用的默认镜像那么yum源就是网络yum源，尝试测试网络
ping www.baidu.com  # 发现网络不通
exit # 退出

3.2. Add network test

docker run -it --net=host alpine:latest  bash

 

4. Add network (--network=host) when docker build

docker build -t alpine:latest -f Dockerfile . --network=host