DCOS

A Simple walk-through to set up a local Cassandra multi-node cluster

In our earlier blogs we have already gone through The basic Introduction to Cassandra and also tried to explore the Cassandra Reads and Writes. Today we will be discussing something apart from the in-depth theoretical knowledge of Cassandra. In one of our projects , we came through a basic requirement in which we needed to required a local Cassandra cluster for some kind of testing.  Continue Reading

Running Spark on DC/OS

Devops engineers for long needed an open source tool to make it easy to deploy the code developed through all the ups and downs to reach this far and is considerably more capable of evolving (pun intended). As we all know in this world of agile we need to shift our requirements after a short duration of time. Be it addition of a feature or tweaking Continue Reading

Deploying Services In DC/OS

DC/OS uses Marathon to manage processes and services. Marathon is the “init system” for DC/OS. Marathon starts and monitors your applications and services, automatically healing failures. A native Marathon instance is installed as a part of DC/OS installation. DC/OS services are Marathon applications that are deployed on DC/OS. We create or install a package from the Catalog to start a service. Both services you create Continue Reading

Security In DC/OS

Every company’s most valuable asset is its data. However, that data is also constantly under threat from bad actors around the world. To retain the trust of their customers, partners, and shareholders, every business needs to protect their data and applications. DC/OS Enterprise offers a range of features that allows you to secure your cluster and prevent breaches and other attacks. So, let’s see the Continue Reading

DC/OS: The Architecture #1

Mentioned in a paper called “Datacenter needs an Operating System” published at the University Of California. The expectations in the paper were roughly rounded up to the following points: Sharing of Data & Resources. Programming Abstractions. Debugging & Monitoring. Mesosphere DC/OS, as a datacenter os, does the following above things for the user. The actual feeling you get when you use DC/OS is similar to Continue Reading

DCOS : Deploy a Load Balanced App using Marathon-lb

In this blog, we are going to deploy a sample load balanced app over DCOS and expose it to the outside of the cluster using Marathon-lb. Here we will be using a containerized application which serves a DCOS site. Here we are using Marathon-lb as an external load balancer. It is based on HAProxy which provides proxying and load balancing for TCP and HTTP based applications. Continue Reading

DC/OS Installation experience on Local Cluster

Recently got the task to install DC/OS on our local cluster. Previously I used AWS to install DC/OS, but this time I had to do everything on our own, from installing CentOS to creating the DC/OS cluster. With this blog, I am going to share my experience that I faced in installing DC/OS. It took almost three days, but at the end I successfully installed Continue Reading

Simple Things You Can Learn From Cassandra Nodetool (Monitor/Manage) For DC/OS

Cassandra native tool called nodetool is used for monitoring and managing cassandra cluster for dcos

Automatic Deployment Of Lagom Service On ConductR On DCOS

In our previous blog we have seen how to deploy the lagom service on conductr – https://blog.knoldus.com/2017/05/25/deploying-the-lagom-service-on-conductr/ In this blog we will create script to deploy your Lagom service on conduct present or running on top of DCOS. There are two types of automatic deployments can be done – Deploying from scratch (stop the current Lagom bundle and deploy the new one) Rolling/Incremental Deployment( Overriding Continue Reading

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