zscaler guide issue, zscaler-cert.pem does not work with update-ca-certificates, should use .crt extension instead

[bew]

Is this a docs issue?

• My issue is about the documentation content or website

Type of issue

Information is incorrect

Description

Hello,

I tried following the ZScaler guide to add a new CA certificate to my containers, but later curl calls were still failing.
Using explicit curl --cacert /path/to/zscaler-cert.pem ... did work though.

After some research, I found out that only files with .crt extension are automatically added by update-ca-certificates but the guide suggests to use .pem extension instead..

Surprisingly an earlier generic guide for adding ca certs in a docker image does tell users to use .crt extension, so I guess this is only an error/typo in the zscaler guide.

/cc @dvdksn (as you wrote both guides in #21284 #20822)

Location

https://docs.docker.com/guides/zscaler/

Suggestion

The guide should be updated to use zscaler-cert.crt instead of zscaler-cert.pem, so that update-ca-certificates actually automatically adds it to the trusted ca certificates.

[dvdksn]

Thanks @bew for catching this - sorry about any inconvenience this caused. Let me get it updated.

[bew]

ah I also made a PR actually with some more details #21920

[dvdksn]

@bew ah thank you - let me approve yours 👍🏻

[bew]

Awesome, thank you for the quick reaction ✨

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