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Recently, I got a chance to dockerize a traditional MongoDB replica set. Currently, I am doing it for QA and UAT environment where MongoDB replica set is setup on a single host. So, in this blog, we will do it on a single host using Docker Networking and Docker Compose. Scenario: Set up a MongoDB replica using version 3.0.5 set...
I was recently searching for something on Google and came across this instance of what might be a logical vulnerability prevailing across multiple web applications. I was searching for publicly accessible Jenkins console through Google Dorking. My search query listed some of the websites that had Jenkins as a part of their domain...
Sysdig has been one of the most advanced cloud-based tools for monitoring your infrastructure. So, talking about Docker monitoring, Sysdig gives us a lot of insights about our containers, few of which we will be talking about in this blog. Docker is the most widely used and trending tool when it comes to DevOps. USE-CASE In this...
I have always loved using Docker the traditional way. Running commands like docker run etc. has been the way we use Docker. While surfing the internet, I found this chrome app which can be downloaded and installed via google chrome and easily be used for getting a user-interface for your Docker Engine. It simplifies the way we use Docker....
The lifecycle hooks are the great feature of auto scaling, it helps to control instance launch and termination state within auto-scaling group. I got to know about this hidden feature when I was looking for a solution where I had to perform some automated tasks on the instance before adding/removing it from auto-scaling group. I was...
This blog post refers to a newly established concept in Docker Technology i.e. Docker Swarm. The Swarm can be used for clustering of more than one Docker engines. Using Swarm, Docker containers can be launched to any node in the cluster. It comprises of 2 logics based on which containers can be launched and managed on the cluster nodes: ...
Last week, I got into a situation where I had to scale the application to store unpredictable user sessions in Memcached. The vertical scaling could be extended up to a limit but to meet the application requirements, I had to go with horizontal scaling. AWS does not provide any service to autoscale Memcached nodes according to the...
CHEF is the most popular configuration management tool in the market these days as CHEF turns infrastructure into code and you can do almost anything using it. Recipes are the heart of CHEF. OpsWorks has been gaining a lot of momentum for last few months, the major factor being its support for CHEF. So, in this blog we will be discussing...
Docker monitoring is very important when it comes to using Docker. In my last blog, I talked about how we can monitor the status of a Docker container using a bash script and AWS CloudWatch. In this blog, I will be telling you how to get insights of your Docker container using a tool called Ruxit. Ruxit is a tool that I found as I...
PostgreSQL is another SQL. It is the second most popular Structured Query Language after MySQL. The steps discussed in the blog can be used for any kind of migration of PostgreSQL. From on-premise to cloud or on-premise to on-premise or cloud to on-premise. Use-case I had to migrate my PostgreSQL running on an EC2 server to RDS...
The AWS re:Invent 2015 has brought with itself a lot of new iterations of services and a lot of new services as well. One such iteration of AWS CloudWatch is the AWS CloudWatch Dashboards. Any of you who might have used tools like Datadog would definitely have heard of metric Dashboards where you can create you custom Dashboards....
Recently, we came across a scenario where we need to create AMIs of multiple production servers running in four different AWS accounts. One solution was to create an automation script to be run on an AWS EC2 instance running in each aws account which would create AMI of all production servers running in each account. This would have...
