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FYI: pkg.go.dev doesn't show packages with generics
2 projects | reddit.com/r/golang | 29 Dec 2021
About a week ago, I upgraded my genesis package to generics. It was a great experience but somehow the new documentation wasn't displayed at pkg.go.dev (ex godoc.org). I tried to request the package in their UI, wait, add docs for the root package, explicitly list sub-packages as dependencies, nothing worked. And then I found the issue go#48264. In short, the pkg site is on Go 1.17 and so cannot parse Go 1.18b1 packages. It will be that way until Go 1.18 is released + some time on top until App Engine picks the new version up.
genesis: generic functions for Go
1 project | reddit.com/r/golang | 21 Dec 2021
Feature Management using Consul KV store in ASP.Net core
2 projects | dev.to | 7 Jan 2022
Source code at Github Consul by HashiCorp
Image manipulation with Go
8 projects | reddit.com/r/golang | 31 Dec 2021
In a cloud environment you need a way for the services to discover each other. Something like Consul can do the job.
Kubernetes at Home with K3s
5 projects | news.ycombinator.com | 5 Dec 2021
That's a false statement as far as the technical aspects are concerned (Swarm is still usable and supported), but is a true statement when you look at the social aspects (Kubernetes won the container wars and now even Nomad is uncommon to run into).
Right now the company i'm in uses Swarm in a lot of places due to its simplicity (Compose file support) and low resource usage - Swarm hits the sweet spot when it comes to getting started with container orchestration and doing so without needing multiple people to wrangle the technical complexity of Kubernetes, or large VMs to deal with its resource usage, at least in on prem environments.
In combination with Portainer (https://www.portainer.io/) it's perhaps one of the best ways to get things done, when you expect everything to just work and aren't doing something too advanced (think along the lines of 10 servers, rather than 100, which is probably most of the deployments out there).
I actually wrote about some of its advantages in my blog post, "Docker Swarm over Kubernetes": https://blog.kronis.dev/articles/docker-swarm-over-kubernete...
That said, if there are any good options to replace Swarm, it has to either be Hashicorp Nomad (https://www.nomadproject.io/) which is a really nice platform, especially when coupled with Consul (https://www.consul.io/), as long as you can get past the weirdness of HCL. Alternatively, it has to be K3s (https://k3s.io/), which gives you Kubernetes without the insane bloat and hardware usage.
I actually benchmarked K3s against Docker Swarm in similar app deployments: 1 leader server, 2 follower servers, running a Ruby on Rails app and an ingress, while they're under load testing by K6 (https://k6.io/). I was attempting to see whether COVID contract tracking with GPS would be viable as far as the system load goes in languages with high abstraction level, here's more info about that: https://blog.kronis.dev/articles/covid-19-contact-tracing-wi...
Honestly, the results were pretty close - on the follower servers, the overhead of the orchestrator agents were a few percent (K3s being heavier, but a few dozen MB here or there not being too relevant), whereas the bigger differences were in the leader components, where K3s was heavier almost by a factor of two, which isn't too much when you consider how lightweight Swarm is (there was a difference of a few hundred MB) and the CPU usage was reasonably close in both of the cases as well. Sadly, the text of the paper is in Latvian, so it's probably of no use to anyone, but i advise you to do your own benchmarks! Being a student, i couldn't afford many servers then, so it's probably a good idea to benchmark those with more servers.
Of note, on those VPSes (4 GB of RAM, single core), the full Kubernetes wouldn't even start, whereas at work, trying to get the resources for also running Rancher on top of a "full" Kubernetes cluster (e.g. RKE) can also take needlessly long due to the backlash from ops. Also, personally i find the Compose syntax to be far easier to deal with, rather than the amalgamation that Kubernetes uses, Helm probably shouldn't even be a thing if the deployment descriptors weren't so bloated. Just look at this: https://docs.docker.com/compose/compose-file/compose-file-v3...
- Docker Swarm is pretty good when you're starting out with containers and is reasonably stable and easy to use
Designing large scale apps using micro services
2 projects | reddit.com/r/node | 16 Nov 2021
Check out Consul from HashiCorp. https://www.consul.io/
Nginx – The Architecture of Open Source Applications
5 projects | news.ycombinator.com | 2 Nov 2021
> As a relatively young dev, the idea of a "web server" as a standalone binary that serves your application (vs a library that you use to write your own "server") feels strange.
In my eyes, the ideal setup is one that's layered: where you have an ingress that's basically a load balancer that also ensures that you have SSL/TLS certificates, enforces rate limits, perhaps is used for some very basic logging, or can optionally do any URL rewriting that you need. Personally, i think that Caddy (https://caddyserver.com/) is lovely for this, whereas some people prefer something like Traefik (https://traefik.io/), though the older software packages like Nginx (https://nginx.org/en/) or even Apache (https://www.apache.org/) are good too, as long as the pattern itself is in place.
Then, you may additionally have any sorts of middleware that you need, such as a service mesh for service discovery, or providing internal SSL/TLS - personally Docker Swarm (https://docs.docker.com/engine/swarm/) overlay networks have always been enough for me in this regard, though some people enjoy other solutions, such as Hashicorp Consul (https://www.consul.io/), or maybe something intended for Kubernetes or other platforms that you already may be using, like Linkerd (https://linkerd.io/).
Finally, you have your actual application with its server. Personally, i think that the web server should be embedded (for example, embedded Tomcat with Spring Boot) or indeed just be a library that's a part of the application executable, as long as you can update it easily enough by rebuilding the application - containers are good for this, but aren't strictly necessary, since sometimes other forms of automation and packaging are also enough.
The reason why i believe this, is because i've seen plenty of deployments where that just isn't the case:
- attempts to store certificates within the application, each application server having different requirements for the formats to be used, making management (and automation) of renewal a total nightmare
An Update on Our Outage
3 projects | news.ycombinator.com | 31 Oct 2021
Programming Microservices Communication With Istio
7 projects | dev.to | 28 Oct 2021
Service discovery — Traditionally provided by platforms like Netflix Eureka or Consul.
1 project | reddit.com/r/PrometheusMonitoring | 11 Sep 2021
For discovery outside of Kubernetes, you can use whatever your configuration management database is to generate the discovery configs. But you might want to look at Consul. The down side to using discovery scripts is the monolithic update lag. I used to have a medium sized setup with Chef and Nagios. It took something like 5 minutes just to run one config cycle. As we transitioned to Prometheus we cut the cycle down to a couple minutes, because we had smaller targeted configs.
HashiCorp Consul: What's the catch?
5 projects | reddit.com/r/devops | 4 Sep 2021
So, my tech lead has once more had the sweet whispers of HashiCorp blaring in his ear, and to my irritation has decreed that we will be prioritizing bringing Consul into our environment despite pretty much everything else we have being in various states of rotting popsicle sticks and scotch tape.
An Introduction to Microservices pt. 3
1 project | dev.to | 24 Aug 2021
What are some alternatives?
etcd - Distributed reliable key-value store for the most critical data of a distributed system
traefik - The Cloud Native Application Proxy
kubernetes - Production-Grade Container Scheduling and Management
Caddy - Fast, multi-platform web server with automatic HTTPS
Apache ZooKeeper - Apache ZooKeeper
minio - High Performance, Kubernetes Native Object Storage
vaultwarden - Unofficial Bitwarden compatible server written in Rust, formerly known as bitwarden_rs
Nomad - 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.
nsq - A realtime distributed messaging platform
Rundeck - Enable Self-Service Operations: Give specific users access to your existing tools, services, and scripts
Eureka - AWS Service registry for resilient mid-tier load balancing and failover.
Golang API Starter Kit - Go Server/API boilerplate using best practices DDD CQRS ES gRPC