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Setting up a Cassandra cluster with SSL for client and cluster transports for DevOps

in Cassandra

February 2, 2017

Setting up client and cluster SSL transport for a Cassandra cluster This articles is a Cassandra tutorial on Cassandra setup for SSL and CQL clients, as well as installing Cassandra with SSL configured on a series of Linux servers. Cassandra allows you to secure the client transport (CQL) as well as the cluster transport (storage transport). SSL/TLS have some overhead. This is especially true in the JVM world which is not as performant for handling SSL/TLS unless you are using Netty/OpenSSl integration.

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Setting up a Cassandra cluster with cassandra image and cassandra cloud project with Vagrant for DevOps

in Cassandra

February 1, 2017

The cassandra-image project creates CentOS Cassandra Database images for docker, virtualbox/vagrant and AWS/EC2 using best practices for Cassandra OS setup. It is nice to use vagrant and/or docker for local development. At this time it is hard to develop systemd services using Docker so we use Vagrant. Since we do a lot of that, we like to use Vagrant. Vagrant is important for developers and DevOps not to mention Cassandra DBAs.

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Systemd dependencies example

in systemd

January 31, 2017

We use systemd unit quite a bit. Getting dependencies correct can be tricky. We use systemd to start up Cloudurable Cassandra config scripts. We use systemd to start up Cassandra/Kafka, and to shut Cassandra/Kafka down nicely. Since systemd is pervasive in all new mainstream Linux distributions, you can see that systemd is an important concept for DevOps. We wrote this little example to try to understand how systemd dependencies work, and explain it to others.

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High-Speed Microservices

in Microservices

January 30, 2017

Microservices Architecture | High-Speed Microservices This article endeavors to explain high-speed microservices architecture. If you are unfamiliar with the term microservices, you may want to first read this blog post on microservices by Michael Brunton and if have more time on your hands this one by James Lewis and Martin Fowler. High-speed microservices is a philosophy and set of patterns for building services that can readily back mobile and web applications at scale.

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Microservices Architecture

in Microservices

January 30, 2017

Microservices The term “Microservices Architecture” is now a popular trend. Unlike many trends, this one seems to have some momentum and is more about how people are developing services versus vendors commandeering and needlessly complicating something simple. For example, SOA started off as a rather simple set of concepts and became something vast and complex. Services are excellent. Web Services are good. SOA has a bad reputation and is associated with being overly complicated (WSDL, BPEL, WS-blah, etc.

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Notes on Cassandra OS setup and optimizations for deploying in EC2/AWS

in Cassandra

January 30, 2017

Notes on Cassandra OS setup and optimizations for deploying in EC2/AWS Disk concerns These are important concepts for developers and DevOps who are responsible for developing Cassandra based applications and services. Cassandra writes to four areas commit logs SSTable an index file a bloom filter The compaction process of SSTable data makes heavy use of the disk. LeveledCompactionStrategy may need 10 to 20% overhead. SizeTieredCompactionStrategy worse case is 50% overhead needed to perform compaction.

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AWS VPC

in Amazon VPC

November 7, 2016

Understanding what AWS provides for setting up private networks, security groups and more is important for anyone who calls themselves DevOps. AWS allows you to define a software defined network. You do this with Amazon Virtual Private Cloud (Amazon VPC). You can define subnets, ingress rules, security groups, NAT gateways, Internet gateways, and more. Amazon VPC A VPC is a virtual private cloud. You can create multiple Amazon VPCs within a region that spans multiple availability zones.

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Backup/Recovery with EBS

in aws

November 7, 2016

Understanding what AWS provides for backing up EBS volumes is an important concept for DevOps. Data safety with EBS - Backup/Recovery (Snapshots) Amazon EBS allows you to easily backup data. You do this by taking snapshots. Snapshots are point-in-time backups. Data written to an EBS volume can be periodically used to create a snapshot. Snapshots provide incremental backups of your data. Snapshots just saves the blocks that have changed. Only changed blocks since the last snapshot are saved in the new snapshot.

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EC2 Compute

in Amazon EBS

November 7, 2016

Understanding what AWS/EC2 provides for provisioning on-demand computing is essential for all DevOps. Amazon Elastic Compute Cloud (Amazon EC2) Amazon EC2 is AWS primary web service that provides resizable compute capacity in the cloud. EC2 Compute Compute is computational power needed for your use case. Amazon EC2 allows add compute resources through its Web Service API. EC2 allows you to launch instances. An instance is a server and you can install whatever software you need for your service or web application: NGINX, Apache httpd, Cassandra, Kafka, etc.

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Learn about Kafka Architecture

in Kafka Training

November 7, 2016

Learning about the Kafka Streaming Platform Brief introduction to Kafka Streaming Platform from Jean-Paul Azar Slideshare Kafka Architecture. PDF: Introduction to Kafka Architecture. Related content Kafka Architecture What is Kafka? Kafka and Schema Registry Kafka and Avro Kafka Tutorial Kafka Training Training for DevOps, Architects and Developers This Kafka training course teaches the basics of the Apache Kafka distributed streaming platform. The Apache Kafka distributed streaming platform is one of the most powerful and widely used reliable streaming platforms.

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