Docker WARNING: Ignoring https://dl-cdn.alpinelinux.org/alpine/v3.15/main: temporary error (try agai

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Step 2/6 : RUN apk add --no-cache python2 g++ make
 ---> [Warning] IPv4 forwarding is disabled. Networking will not work.
 ---> Running in 00076a48df5f
fetch https://dl-cdn.alpinelinux.org/alpine/v3.15/main/x86_64/APKINDEX.tar.gz
fetch https://dl-cdn.alpinelinux.org/alpine/v3.15/community/x86_64/APKINDEX.tar.gz
WARNING: Ignoring https://dl-cdn.alpinelinux.org/alpine/v3.15/main: temporary error (try again later)
WARNING: Ignoring https://dl-cdn.alpinelinux.org/alpine/v3.15/community: temporary error (try again later)
ERROR: unable to select packages:
  g++ (no such package):
    required by: world[g++]
  make (no such package):
    required by: world[make]
  python2 (no such package):
    required by: world[python2]

重启Docker Daemon守护进程：systemctl daemon-reload

重启Docker Cli服务：systemctl restart docker.service

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