Dec 252017

I got my blog here for a long time. Moving from stand-alone into Docker containers, moving those from AWS to GC to Linode servers, and now to AWS again. At least for the time being.

The new part is that the new blog won’t be WordPress anymore, but in order to carry over the old blog, I simply copied it via the awesome HTTrack

The new location also changes the domain:


 Posted by at 21:10  Tagged with:
Dec 022017

Whoa…AWS is not joking when saying that in AWS Simple Queue Service the order is not guaranteed. I send in this (in exactly that order):

100, 101, 102, 103, 104, 105, 106, 107, 108, 109

and I receive this:

108, 102, 106, 101, 105, 109, 100, 103, 104, 107


 Posted by at 21:26  Tagged with:
Nov 052017
AWS - Route53 and your own IP

AWS is functionally very nice, but the docs are…improvable. Thus the need for me to write down things which should be simple but are not:

Updating DNS Records

Very easy to do in the GUI. Tricky the first time you try this from the aws CLI.

I got a delegated zone aws.XXX. (I own XXX and i delegated aws.XXX. to AWS Route53) and when I boot my (special) EC2 instance, I’d like it to update the DNS record accordingly.

Here the needed batch file (stored in the file “dnsupdate.json”)

  "Comment": "Updating my EC2 instance DNS record", 
  "Changes": [ 
      "Action": "UPSERT", 
      "ResourceRecordSet": { 
        "Name": "", 
        "Type": "A", 
        "TTL": 300, 
        "ResourceRecords": [ 
            "Value": "" 

Pitfall 1: “Name” is the full FQDN. Get your current IP via


Then update via aws CLI:

aws route53 change-resource-record-sets --hosted-zone-id Z1KXXXXXXXXXX \
--change-batch file:///home/ec2-user/dnsupdate.json

Pitfall 2: The batch file location MUST NOT be the simple “dnsupdate.json” but it MUST BE “file://absolute/path/to/the/file.json”. Otherwise you get the totally unhelpful error message

aws route53 change-resource-record-sets --hosted-zone-id Z1KXXXXXXXXXX \
--change-batch dnsupdate.json                        

Error parsing parameter '--change-batch': Expected: '=', received: 'EOF' for input: