CoreDNS VS Vault

CoreDNS supports this via the bind plugin.

I'd like to use Cloudflare's 1.1.1.1 and 1.0.0.1 nameservers in Kubernetes, alongside DNS over TLS. It looks like I can do it using core-dns. I need to setup the following somehow:

Shamless plug for CoreDNS. Much better DNS server than classic bind9. And of course there's already a nice container image for it.

But another approach that could work in Kubernetes, because the DNS servers are within the cluster itself, would be to work directly with the DNS server pods. In most Kubernetes clusters, whether standalone or managed (GKE, AKS, EKS), the cluster DNS is either coredns or kube-dns. That was great to minimize how much configuration options we’d need to support. We realized we could edit the coredns or kube-dns configmap resources to enable their log option, which would make them log all the queries they handle. We’ll cover exactly how it’s done in more detail below.

CoreDNS has an ectd plugin, so your service could add entries to a database, which is used as record source. Not the same mechanism as you have described, but it will get the job done. Also this is what Kubetnetes does for incluster dns records.

nevermind there's caddy builtin upgrade method https://github.com/coredns/coredns/issues/6034

Coredns can be spun up in a docker container, just starting to get into it myself

CoreDNS is a pretty good DNS server.

Core DNS (https://coredns.io).

HashiCorp Vault

For a more comprehensive and robust secret management solution, get your hands on tools like GCP Secret Manager, or HashiCorp Vault. They're like the security guards of your secrets, providing a safe house, access control, and keeping logs of who’s been snooping around.

HashiCorp Vault is a popular tool for managing secrets in Kubernetes clusters. It offers advanced features such as secure storage, encryption, dynamic secrets generation, and integration with Kubernetes through its Kubernetes authentication method.

So you've just bought a new platform tool? Maybe it's Hashicorp Vault? Snyk? Backstage? You’re excited about all of the developer experience, security and other benefits you're about to unleash on your company—right? But wait…

You seem to be looking for a cross-platform solution, and https://www.vaultproject.io/ provides just that. If everything was in AWS, AWS Secret Manager might be great, but imo Vault provides much better platform-agnostic capabilities.

https://github.com/openwrt/luci/blob/master/applications/luc...

https://developer.hashicorp.com/vault/tutorials/secrets-mana... https://github.com/hashicorp/vault :

> Refer to Build Certificate Authority (CA) in Vault with an offline Root for an example of using a root CA external to Vault.

Secret Management: Securely stores sensitive configuration data and secrets using tools like AWS Secrets Manager or HashiCorp Vault. Avoid hardcoding secrets in code or configuration files.

The author of this tool basically took the Shamir code from Hashicorp Vault, which is pretty mainstream. If you're looking for a solid implementation, I would start there[0]. I wouldn't use the Shamir code from this repo, as it's an old version of the vault code using field arithmetic that doesn't run in constant time.

[0]: https://github.com/hashicorp/vault/blob/main/shamir/shamir.g...

Out of curiosity, what do you mean by this? cross-cluster? they already have HA: https://github.com/hashicorp/vault/blob/v1.14.1/website/cont...

while digging up that link, I also saw one named replication: https://github.com/hashicorp/vault/blob/v1.14.1/website/cont...