Nginx gracefully upgrades executable on the fly

• Caddy

  402 53,718 9.5 Go

  Fast and extensible multi-platform HTTP/1-2-3 web server with automatic HTTPS

  

We did this for Caddy 1 too [1]. It was really cool. I am not sure how many people used this feature, so I haven't implemented it for Caddy 2 yet, and in the ~two years that Caddy 2 has been released, I've only had the request once. It's a bit tricky/tedious to do properly, but I'm willing to bring it over to Caddy 2 with a sufficient sponsorship.

[1]: https://github.com/caddyserver/caddy/blob/v1/upgrade.go

• ingress-nginx

  203 16,638 9.6 Go

  Ingress-NGINX Controller for Kubernetes

  

Even with containerized workloads, you still have an ingress, or SPOF (or multiple, when using multicast), and the seamless restart is meant for exactly those processes. Nginx is often used (https://kubernetes.github.io/ingress-nginx/), or when you use AWS, GCS etc they provide such a service for you.

Not sure how the cloud providers do it though, maybe combination of low DNS TTL and rolling restart since they often have huge fleets of servers which handle ingress?

• WorkOS

  workos.com sponsored

  The modern identity platform for B2B SaaS. The APIs are flexible and easy-to-use, supporting authentication, user identity, and complex enterprise features like SSO and SCIM provisioning.

  

• socketmaster

  1 646 2.4 Go

  Zero downtime restarts for your apps

If Caddy were to support systemd socket activation, this self-restart dance is not necessary as the parent process (systemd) is holding the socket for you. And for other systems, they can use https://github.com/zimbatm/socketmaster instead.

But I suspect that most Caddy deployments are done via docker, and that requires a whole container restart anyways.

• -

  1 4 2.9 Rust

  - is a proxy (by monroeclinton)

I've been working on something similar in an l4 load balancer I've been writing in Rust. It's still a work in progress.

Basically the parent executes the new binary after it receives a USR1 signal. Once the child is healthy it kills the parent via SIGTERM. The listener socket file descriptor is passed over an environment variable.

https://github.com/monroeclinton/- (this is the proper url, it's called dash)

• overseer

  5 2,209 0.0 Go

  Monitorable, gracefully restarting, self-upgrading binaries in Go (golang)

Someone did this for golang. It isn't perfect, but works for some basic use cases... https://github.com/jpillora/overseer

• InfluxDB

  www.influxdata.com sponsored

  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.

  

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