GCE の debian で apt update したときのエラー

環境

  • Debian 9 (stretch) on GCE

GCE の Debian で運用してたときに apt update したら cloud-sdk まわりでエラーがでた。

Err:6 http://packages.cloud.google.com/apt cloud-sdk-stretch InRelease

  The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 6A030B21BA07F4FB

Err:8 http://packages.cloud.google.com/apt google-compute-engine-stretch-stable InRelease

  The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 6A030B21BA07F4FB

Err:9 http://packages.cloud.google.com/apt google-cloud-packages-archive-keyring-stretch InRelease

  The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 6A030B21BA07F4FB

なんかの key が無効になったらしいので改めて追加

$ curl https://packages.cloud.google.com/apt/doc/apt-key.gpg | apt-key add -
参考