How to remove cloud init from ubuntu
If you're trying to start a cloud-init based Ubuntu VM with KVM you will suffer long boot times and confusing output on the terminal. If you want to get rid of it you need to remove cloud-init.
- wait until the VM boots
- login
echo 'datasource_list: [ None ]' | sudo -s tee /etc/cloud/cloud.cfg.d/90_dpkg.cfgsudo apt-get purge cloud-initsudo rm -rf /etc/cloud/; sudo rm -rf /var/lib/cloud/- reboot
Disable only
Touch the file /etc/cloud/cloud-init.disabled or use the kernel parameter cloud-init=disabled to disable cloud-init without completely removing it.
Related cards:
How to Protect container images with production tag from ECR lifecycle rules
If you want to automatically delete old container images from your Elastic Container Registry, the solution is a quite simple ECR Lifecycle Rule that deletes images e.g. 7 days after they have been pushed to the registry.
If you however want to _...
How to unban host with Fail2ban
To see all jails:
fail2ban status
Our $JAIL is usually ssh.
To see which IPs are banned currently:
fail2ban-client status ssh
If you want to unban a host banned by fail2ban on Ubuntu 14.04 or later use this method:
HowTo apply Test Driven Development to Container Images
Apply Test Driven Development(TDD) to the process of building container images by defining test before writing code and automate the testing process. Iterate through the TDD cycle while developing and running the tests later in continuous integrat...
HowTo: let puppet agent run from different branch
This is not encouraged because this change is easily forgotten. We recommend using this only if you know what you are doing.
Should you be in need to run puppet from a branch (called environment in puppet land) other than production for a...
Run multiple Redis servers on Ubuntu
This is a way to run multiple redis server on one ubuntu server.
These steps you have to do only once:
- Adjust init script
Change some Variables.
From this:
DAEMON_ARGS=/etc/redis/redis.conf
NAM...
HowTo: verify SSL private key matches SSL certificate
When receiving a new SSL-Certificate for an existing SSL-key it should be checked that they match cryptographically.
Maybe the customer accidentally created a new key and certificate and sent us just the certificate.
It's also possible that the c...
HowTo: Clone and refresh all repos in a GitLab Group
If the project you're working on has, say, 39 repositories and counting in GitLab and you need all the repos checked out for some reason, here's how to do it.
Checking out all repos
- Create a personal access token for GitLab that has the `A...
HowTo: Rebalance Elasticsearch Shards
If you end up with an Elasticsearch cluster which has a very different disk usage on it's nodes you can use these steps to rebalance the shards.
Before we begin it's important to understand how Elasticsearch defines [balance](https://www.elastic....
HowTo: Curl applications that are usually behind reverse proxies with TLS termination without the application redirecting to https schema
A lot of web applications require being called over https, which is a good thing. It's possible to configure this requirement at the web- or proxy server level, where nginx or apache will just redirect every request on http to https. Som...
stopping / restarting libvirt on Ubuntu 16.04 with systemd
Because systemd is the greatest thing ever it's not enough to stop the libvirt service. You need to disable the libvirt socket too.
sudo systemctl stop libvirt-bin
sudo systemctl stop libvirt-bin.socket
sudo systemctl start libvirt-bin
