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FAQ: env vars for SSL root certs and DNS resolver

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Added section to FAQ about environment variables, which allow to control
location of SSL root certificate as well as DNS resolver used.

see also comment in #683
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Lucas Bremgartner 2018-01-15 22:32:37 +01:00 committed by Nick Craig-Wood
parent 4b0c5f79b5
commit 8c90bfb0cd
1 changed files with 7 additions and 0 deletions
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docs/content/faq.md
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@ -125,6 +125,9 @@ curl -o /etc/ssl/certs/ca-certificates.crt https://raw.githubusercontent.com/bag
ntpclient -s -h pool.ntp.org ntpclient -s -h pool.ntp.org
``` ```
The two environment variables `SSL_CERT_FILE` and `SSL_CERT_DIR`, mentioned in the [x509 pacakge](https://godoc.org/crypto/x509),
provide an additional way to provide the SSL root certificates.
Note that you may need to add the `--insecure` option to the `curl` command line if it doesn't work without. Note that you may need to add the `--insecure` option to the `curl` command line if it doesn't work without.
``` ```
@ -161,3 +164,7 @@ dig www.googleapis.com @8.8.8.8 # resolve with Google's DNS server
If you are using `systemd-resolved` (default on Arch Linux), ensure it If you are using `systemd-resolved` (default on Arch Linux), ensure it
is at version 233 or higher. Previous releases contain a bug which is at version 233 or higher. Previous releases contain a bug which
causes not all domains to be resolved properly. causes not all domains to be resolved properly.
Additionally with the `GODEBUG=netdns=` environment variable the Go
resolver decision can be influenced. This also allows to resolve certain
issues with DNS resolution. See the [name resolution section in the go docs](https://golang.org/pkg/net/#hdr-Name_Resolution).