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Hook for letsencrypt.sh to do DNS challenges
#!/usr/bin/env ruby
require 'aws-sdk'
require 'pry'
require 'awesome_print'
# ------------------------------------------------------------------------------
# Credentials
# ------------------------------------------------------------------------------
# pick up AWS_ACCESS_KEY_ID and AWS_SECRET_ACCESS_KEY by default from
# environment
Aws.config.update({
region: 'us-west-2',
})
# ------------------------------------------------------------------------------
def setup_dns(domain, txt_challenge)
route53 = Aws::Route53::Client.new()
hosted_zone = route53.list_hosted_zones_by_name(
{dns_name: "#{domain}."}).hosted_zones[0]
changes = []
changes << {
action: "UPSERT",
resource_record_set: {
name: "_acme-challenge.#{domain}.",
type: "TXT",
ttl: 60,
resource_records: [
value: "\"#{txt_challenge}\"",
],
},
}
resp = route53.change_resource_record_sets({
hosted_zone_id: hosted_zone.id,
change_batch: {
changes: changes,
},
})
ap resp
sleep 10
end
def delete_dns(domain, txt_challenge)
route53 = Aws::Route53::Client.new()
hosted_zone = route53.list_hosted_zones_by_name(
{dns_name: "#{domain}."}).hosted_zones[0]
changes = []
changes << {
action: "DELETE",
resource_record_set: {
name: "_acme-challenge.#{domain}.",
type: "TXT",
ttl: 60,
resource_records: [
value: "\"#{txt_challenge}\"",
],
},
}
resp = route53.change_resource_record_sets({
hosted_zone_id: hosted_zone.id,
change_batch: {
changes: changes,
},
})
ap resp
sleep 10
end
if __FILE__ == $0
hook_stage = ARGV[0]
domain = ARGV[1]
txt_challenge = ARGV[3]
puts hook_stage
puts domain
puts txt_challenge
if hook_stage == "deploy_challenge"
setup_dns(domain, txt_challenge)
elsif hook_stage == "clean_challenge"
delete_dns(domain, txt_challenge)
end
end

This script works great if you are trying to issue a certificate for your hosted zone exactly (e.g. my hosted zone in AWS is example.net and I want a certificate for example.net) but it fails if you want a certificate for a subdomain (e.g. sub.example.net).

The problem is on lines 19 and 45 where it uses the domain name to search for the hosted zone. As a quick patch I just hardcoded the zone I needed and it worked great. Thanks.

tache commented Mar 1, 2016

I updated your gist in my fork to allow for subdomains.

Tried this hook with letsencrypt.sh. Looks like there is an issue when it runs with the latest version of awesome_print(1.7.0).
Throws error: awesome_print-1.7.0/lib/awesome_print/formatter.rb:122:in method': undefined methodto_hash' for class `Seahorse::Client::Response'
It works fine with awesome_print-1.6.1. Thanks.

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