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API 証明書を置き換えた後に OpenShift 4 にログインすると「error: x509 certificate signed by unknown authority」が表示される

Solution Verified - Updated -

Issue

  • API 証明書を置き換えた後、oc login が以下のエラーを出して失敗します。
$ oc login https://api.cluster.domain.tld:6443
error: x509: certificate signed by unknown authority
  • コマンドラインで CA を追加しても、この問題は解決しません。
$ oc login --certificate-authority=ca-cert.pem https://api.cluster.domain.tld:6443
error: x509: certificate signed by unknown authority

Environment

  • Red Hat OpenShift Container Platform
    • 4.x

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