A blog site on our Real life experiences with various phases of DevOps starting from VCS, Build & Release, CI/CD, Cloud, Monitoring, Containerization.
Recently, I’ve been working on a project where we have a very large team. After the new feature is developed, the developers need to test the feature’s function. So we need to install some test tools on the server for testing purposes and we have to do this activity very frequently. Also, I wanted to schedule planned activities without an integrated third party tool with Ansible.
So, this is my writeup on how I was able to achieve my first Remote Code Execution. Also after reviewing the code I was able to understand more about malicious code execution via OS functions. Finally, I was able to capture the flag and get the Hall of Fame.
Out of Band(OOB) Command Injection is performed by sending a DNS request to a server, which occurs when input data is interpreted as an operating system command. By this, an attacker can execute arbitrary commands on the system and gain unauthorized access.
When I set forth with my journey of containerization with docker, I have gone through a misconception that Overlay networking in docker can’t be set up without any orchestrator like Docker swarm, Kubernetes. But after spending some time with containers I realized that I was wrong, Orchestrators leverage the functionality of overlay networking but it is not true that we cannot use overlay networks without any swarm or Kubernetes.
As we all know that the caching is a process that everyone uses using different topologies like caching at application node, geographical caching, even some organizations set up a completely dedicated cluster of nodes only for caching.
In this blog, we will discuss setting up Geographical caching using Cloudflare’s Content delivery network and Cloudflare’s workers.
Continue reading “Cache Using Cloudflare Workers’ Cache API”
GFS backup is a common rotation scheme for backup, in which there are three or more backup cycles, such as daily, weekly, and monthly. Typically, It consists of daily backups (son, at fixed intervals of hours in a day), a weekly full backup (father, once a week), and monthly full backup (Grandfather, once a month).
Continue reading “Automatically Backup Alibaba MySQL using Grandfather-Father-Son Strategy”
