Clivern

A Software Engineer and Occasional Writer.

Kubernetes Deployment in a Nutshell

04 April 2020

Deployment is a higher-level resource meant for deploying applications and updating them declaratively, instead of doing it through a ReplicationController or a ReplicaSet, which are both considered lower-level concepts.

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Concurrency in Elixir

03 January 2020

Concurrency is a fundamental concept in Elixir, a functional programming language built on the Erlang virtual machine (BEAM). Elixir provides powerful tools and abstractions for managing concurrent processes, making it ideal for building scalable and fault-tolerant systems.

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A Deep Dive into Metrics Based Alerting With Elasticsearch

02 January 2020

Elasticsearch is an open-source, distributed search and analytics engine based on the Lucene search engine library. It is designed to handle large volumes of data in real-time and provides fast, efficient search and analysis capabilities. Elasticsearch is commonly used for log analysis, full-text search, and business analytics

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Leader Election with Consul and Golang

16 June 2019

Leader election is the process of designating a single node as the organizer of some task distributed among several nodes. The leader will be responsible for managing the others and coordinate the actions performed by other nodes. If for any reason the leader fails, other nodes will elect another leader and so on. This can help to ensure that nodes don't conflict with each other.

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Leveraging Consul’s DNS Interface

08 May 2019

Consul DNS interface allows applications to make use of service discovery without any integration with Consul. For example, instead of making HTTP API requests to Consul, a host can use the DNS server directly via name lookups like clivern.service.us.consul.

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Django Custom Month and Year Lookup

27 April 2019

Everyone want to keep Django timezone support but sometimes you need to keep your SQL queries a way from timezone conversion especially if by default your application timezone is UTC. Django will do something like this `CONVERT_TZ(`app_incident`.`datetime`, 'UTC', 'UTC'))` and it will return `Null` if the timezone table is empty. Even that conversion is not even needed.

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Django Custom Lookups

23 April 2019

By default Django has a `date` lookup that support timezones. It actually will wrap your field with `CONVERT_TZ` in case `USE_TZ` is `True`. This is pretty awesome unless you have timezones table empty because this call will return `Null.`

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