debian

Apr

2019

Add your custom image to DigitalOcean with Vmware Fusion

I run my Chef cookbooks on DigitalOcean. Only problem is, when the OS isn’t supported anymore DO removes it from their supported images.

DO created something what they call: Custom Images.

I created this vm with Vmware Fusion, because i have it installed om my laptop.

1. Start Fusion and choose to create a custom install.
2. DO bills you for the amount of diskspace you use, so we will keep the image as small as possible. I managed to get it inside a 1GB image, 2GB would be easier. Click customtize settings before finishing. When choosing the size click on advanced options and deselect Split into multiple files

These are my options during the installer.

1. Language → English
2. Country → Other → Europe → Belgium
3. Locales → United States
4. Keymap → american English
5. Hostname → debian
6. Partitioning → Manual → Remove all partitions, and create only 1 partition
7. package survery → no
8. Grub boot loader → yes
  1. Grub boot loader → /dev/sda
9. echo -e “/dev/vda1\t /\t ext4\t errors=remount-ro\t 0\t 1” > /etc/fstab
10. reboot the server

Last steps before uploading.

apt-get update
apt-get upgrade
apt-get dist-upgrade
apt-get clean
apt-get install sudo openssh-server
1. Digitalocean uses cloud-init to configure the images. Cloud-init depends on some python packages. The latest version in debian jessie doesn’t support DO yet, which makes the initializing process slow. As the cloud-init package doesn’t have any wierd dependecies i just wget the package.
2. apt-get install gdisk python3-configobj python3-configobj python3-jinja2 python3-jinja2 python3-jsonpatch python3-jsonschema python3-oauthlib python3-requests python3-six python3-yaml python3-serial
3. cd /tmp
4. wget http://nl.archive.ubuntu.com/ubuntu/pool/main/c/cloud-init/cloud-init_18.5-45-g3554ffe8-0ubuntu1~18.04.1_all.deb
5. wget http://ftp.nl.debian.org/debian/pool/main/c/cloud-utils/cloud-guest-utils_0.29-1_all.deb
6. dpkg -i cloud-guest-utils_0.29-1_all.deb
7. dpkg -i cloud-init_18.3-5_all.deb

Feb

2016

preferring ipv4 instead of some ipv6 connections

One of my clients had a problem when he tried to connect to the google maps api using ipv6, there where no problems when i curl the url over ipv4.

As i can’t control the connection the routing to google, i was looking for a alternative solution and found out you can manipulate which address your server prefers.

Something exists called gai.conf, this hooks into the getaddress function.

So i had to block ipv6 requests to 2a00:1450:4013:c01::5f , the easy way is to disable all ipv6 requests.

If you are looking for this, just uncomment this line, and restart the program that is opening a connection.

#precedence ::ffff:0:0/96 100
This is the easy way, and i don’t want to disable all ipv6 connections, so i went ahead and played a bit more.

This was the solution i ended up with.

precedence ::1/128 50 precedence ::/0 40 precedence 2002::/16 30 precedence ::/96 20 precedence ::ffff:0:0/96 10 precedence 2a00:1450::/32 0
You want to uncomment these lines, if you don’t do this, you will block all ipv6 requests again.