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ERROR: k8s GDG error public key is not available

Posted at
  • 過去に執筆した記事を日本語に書き写しました
  • 翻訳機を使用しているため、誤字や不自然な表現があるかもしれません

問題

image.png

Hit:1 http://us-central1.gce.archive.ubuntu.com/ubuntu focal InRelease
Hit:2 http://us-central1.gce.archive.ubuntu.com/ubuntu focal-updates InRelease
Hit:3 http://us-central1.gce.archive.ubuntu.com/ubuntu focal-backports InRelease
Hit:4 http://security.ubuntu.com/ubuntu focal-security InRelease
Hit:6 https://download.docker.com/linux/ubuntu focal InRelease
Get:5 https://packages.cloud.google.com/apt kubernetes-xenial InRelease [8993 B]
Err:5 https://packages.cloud.google.com/apt kubernetes-xenial InRelease
  The following signatures couldn't be verified because the public key is not available: NO_PUBKEY B53DC80D13EDEF05
Reading package lists... Done
W: GPG error: https://packages.cloud.google.com/apt kubernetes-xenial InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY B53DC80D13EDEF05
E: The repository 'https://apt.kubernetes.io kubernetes-xenial InRelease' is not signed.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
root@k8s-worker2:~#

原因

  • KubernetesリポジトリのGPGキーがシステムに存在しないために発生するエラー

解決

sudo curl -fsSL https://packages.cloud.google.com/apt/doc/apt-key.gpg | sudo gpg -o /usr/share/keyrings/kubernetes-archive-keyring.gpg --dearmor
  • gpg --dearmor を使用してキーをバイナリ形式に変換して保存することにより、APT がリポジトリのパッケージ署名を信頼し検証できるようになります

image.png

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