Changelog since v1.6.0-alpha.0

Changes by Kind

Feature

• Add Certificate RenewBefore prometheus metrics (#4419, @artificial-aidan)
• Allow setting Helm chart service annotations (#3639, @treydock)

Bug or Regression

• FIX: Prevent Vault Client from panicing when request to Vault health endpoint fails. (#4456, @JoshVanL)
• Use GetAuthorization instead of GetChallenge when querying the current state of an ACME challenge. (#4430, @JoshVanL)

Other (Cleanup or Flake)

• Deprecation: The API versions: v1alpha2, v1alpha3, and v1beta1, are no longer served in cert-manager 1.6 and will be removed in cert-manager 1.7. (#4482, @wallrj)
• Expose error messages (e.g., invalid access token) from the Cloudflare API to users; allow live testing using Cloudflare API token (not just key). (#4465, @andrewmwhite)
• Update cert-manager base image versions (#4474, @SgtCoDFish)
• Uses Go 1.17 (#4478, @irbekrm)