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@pumbaacave

GKEでnodeを作る時ipたくさん取られた

Posted at

TLDR

Reducing the maximum number of Pods per node also lets you create smaller clusters that require fewer IP addresses.

実はクラスタにはdefault-max-pods-per-nodeというデフォルトパラメーターが付いていて、110に設定されています。nodeを設定する時 max-pods-per-nodeを設定して上書きしないと、nodeが作られる旅に/24のCIDRが振り分けられ（node上１１０のpodがいなくても）、たとえ/21のCIDRをsubnetに振っても８つのnodeしか作れません。

結論

  • クラスターのdefault-max-pods-per-nodeを小さくし
  • nodeはスペックごとにmax-pods-per-nodeを設定しましょう
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