Skip to content

Instantly share code, notes, and snippets.

Embed
What would you like to do?
#!/usr/bin/env nix-shell
#!nix-shell -i bash -p bind.dnsutils -p traceroute -p curl
# impure: needs ping
#source: https://s3.amazonaws.com/aws-cloudfront-testing/CustomerTesting.html
function _e {
echo "> $@"
eval "$@" 2>&1 | sed -e "s/^/ /"
printf "Exit: %s\n\n\n" "$?"
}
function curl_test {
curl -w "
time_namelookup: %{time_namelookup}
time_connect: %{time_connect}
time_appconnect: %{time_appconnect}
time_pretransfer: %{time_pretransfer}
time_redirect: %{time_redirect}
time_starttransfer: %{time_starttransfer}
time_total: %{time_total}
" -v -o /dev/null "$@"
}
function ix {
url=$(cat | curl -F 'f:1=<-' ix.io 2> /dev/null)
echo "Pasted at: $url"
}
(
_e ping -c1 d3m36hgdyp4koz.cloudfront.net
_e ping -4 -c1 d3m36hgdyp4koz.cloudfront.net
_e ping -6 -c1 d3m36hgdyp4koz.cloudfront.net
_e dig -t A identity.cloudfront.net
_e dig -t A resolver-identity.cloudfront.net
_e traceroute -4 d3m36hgdyp4koz.cloudfront.net
_e traceroute -6 d3m36hgdyp4koz.cloudfront.net
_e curl_test -4 'https://d3m36hgdyp4koz.cloudfront.net/nar/0dnnfy935ihgmdrc0lmj5mir7bprsclpyh0gjxyxkcqsi3jy2l7g.nar.xz'
_e curl_test -6 'https://d3m36hgdyp4koz.cloudfront.net/nar/0dnnfy935ihgmdrc0lmj5mir7bprsclpyh0gjxyxkcqsi3jy2l7g.nar.xz'
_e curl -I -4 'https://cache.nixos.org/'
_e curl -I -4 'https://cache.nixos.org/'
_e curl -I -4 'https://cache.nixos.org/'
_e curl -I -6 'https://cache.nixos.org/'
_e curl -I -6 'https://cache.nixos.org/'
_e curl -I -6 'https://cache.nixos.org/'
) | tee /dev/stderr | ix
@vcunat

This comment has been minimized.

Copy link

@vcunat vcunat commented Jul 24, 2018

Updated the above script to reflect these changes, including EDIT1 -- Graham

Please, don't use dig -4. I think you meant dig -t A (which is the default, so you may well simply drop the -4).

dig -4 will attempt to use IPv4 to contact the DNS resolver, which leads to a very strange hang in my case, as I only have an IPv6 server in my /etc/resolv.conf::1.

EDIT1: changed in my fork: https://gist.github.com/vcunat/cc34de33141006c5a2341e0b9683de8b
I suppose ping might be also doubled to ping -4 and ping -6, but I don't know if that would be more useful for debugging the CDN.

@vcunat

This comment has been minimized.

Copy link

@vcunat vcunat commented Jul 28, 2018

Thanks Graham.

@vcunat

This comment has been minimized.

Copy link

@vcunat vcunat commented May 12, 2019

Now the scripts might need updating, at least the lines with cloudfront.net most likely won't be useful anymore, though I don't really know what data is useful here.

@zimbatm

This comment has been minimized.

Copy link

@zimbatm zimbatm commented Sep 3, 2021

There is a new version of this script that now lives over here: https://github.com/NixOS/nixos-org-configurations/blob/master/terraform/cache/diagnostic.sh

Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment