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Let's Encrypt issuance chains update
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Description

meta-task to group the tasks triggered by Let's Encrypt issuance chains update due to their old root CA expiring on September 30, 2021: https://letsencrypt.org/docs/dst-root-ca-x3-expiration-september-2021/

  • Let's Encrypt chain size increase - T283061
  • OpenSSL < 1.1.0 compatibility issues with new LE issuance chain - T283165

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Event Timeline

This is also being covered (for the public-facing side of things) in https://wikitech.wikimedia.org/wiki/HTTPS/2021_Let%27s_Encrypt_root_expiry , which Johan has kindly copied out to the upcoming Monday Tech News and to https://meta.wikimedia.org/wiki/HTTPS/2021_Let%27s_Encrypt_root_expiry for potential translations!