How to Convert Kubernetes Manifests into Nomad Jobspecs

• tracetest-nomad

  2 10 10.0 HCL

  Nomad pack repo for tracetest

  

Ever since I started exploring Nomad, one of the things that I’ve enjoyed doing is taking Docker Compose files and Kubernetes manifests, and translating them into HashiCorp Nomad jobspec. I did it for Temporal back in March 2022, and also for an early version of Tracetest, back in the summer of 2022.

• opentelemetry-demo

  18 1,448 9.5 TypeScript

  This repository contains the OpenTelemetry Astronomy Shop, a microservice-based distributed system intended to illustrate the implementation of OpenTelemetry in a near real-world environment.

  

In my latest Nomadification Project (TM), I got the OpenTelemetry Demo App to run on Nomad (with HashiQube, of course). To do this, I used the OpenTelemetry Demo App Helm Chart as my guide. In doing this, and other Nomadifications, I realized that I’ve never gone through the process of explaining the conversion process from Kubernetes manifests to Nomad jobspecs.

• InfluxDB

  www.influxdata.com featured

  Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.

  

• opentelemetry-helm-charts

  6 338 9.2 Smarty

  OpenTelemetry Helm Charts

  

In my latest Nomadification Project (TM), I got the OpenTelemetry Demo App to run on Nomad (with HashiQube, of course). To do this, I used the OpenTelemetry Demo App Helm Chart as my guide. In doing this, and other Nomadifications, I realized that I’ve never gone through the process of explaining the conversion process from Kubernetes manifests to Nomad jobspecs.

• hcl

  40 5,102 8.1 Go

  HCL is the HashiCorp configuration language.

  

While I like working with both Kubernetes and Nomad alike, there is one thing that I find exceedingly irritating in Kubernetes Land: the fact that a Kubernetes manifest for an app deployment is made up of a scavenger hunt of YAML definitions of various Kubernetes objects. Nomad, however, takes a different approach, using a single HashiCorp Configuration Language (HCL) jobspec file as a one-stop shop for defining your app. I personally find Nomad HCL a lot easier to manage, since there are fewer moving parts, and when it comes to converting Kubernetes manifests to Nomad jobspecs, I find that having a single file to work with makes things a lot simpler.

• nomad-conversions

  3 18 5.1 HCL

  Repo containing conversions of Kubernetes and/or Docker Compose apps to Nomad jobspecs

NOTE: You can find the repo with all of the OpenTelemetry Demo App jobspec files here.

• Nomad

  95 14,457 9.9 Go

  Nomad is an easy-to-use, flexible, and performant workload orchestrator that can deploy a mix of microservice, batch, containerized, and non-containerized applications. Nomad is easy to operate and scale and has native Consul and Vault integrations.

  

The check stanza runs a health check on the service Since the service is registered to Consul, the health check runs on Consul. The above health check is configured to run every 10 seconds, and is given 5 seconds for the health check query to succeed. Health checks in Nomad are similar to Kubernetes health checks.

• PostgreSQL

  411 14,788 10.0 C

  Mirror of the official PostgreSQL GIT repository. Note that this is just a *mirror* - we don't work with pull requests on github. To contribute, please see https://wiki.postgresql.org/wiki/Submitting_a_Patch

  

Which begs the question...how does this translate to Nomad-speak? example-ffspostgres and example-otelcol, are the service names in Kubernetes for PostgreSQL and the OpenTelemetry Collector, respectively, so if we tried to use those same names in our jobspec definition, you’d get a big ‘ole nasty error from Nomad.

• SaaSHub

  www.saashub.com featured

  SaaSHub - Software Alternatives and Reviews. SaaSHub helps you find the best software and product alternatives

  

• traefik

  189 48,176 9.4 Go

  The Cloud Native Application Proxy

  

We’re exposing this service to the outside world via Traefik, and the service is accessible via the URL: http://featureflag.localhost (since I’m running this locally, using HashiQube). Keep in mind that you also need to deploy the Traefik jobspec alongside the featureflagservice jobspec in order to expose this service to the outside world. To learn more about running Traefik on Nomad, check out this post and this post.

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