6 Years with HashiCorp Consul: What I'd Tell Someone Starting Out Today
By Chhay Leanghy — Platform & DevOps Engineer
---
A few weeks ago, I was interviewed by PeerSpot about my experience with HashiCorp Consul. It got me thinking — not just about what Consul does, but about everything I wish I had known when I first started. Six years is a long time with any tool. Here's what I've learned.
---
1. Start with service discovery. Everything else follows.
When I first adopted Consul, I was using static NGINX configuration for service discovery. It worked — until it didn't. When something went wrong upstream, there was no automatic recovery. You had to find it, fix it, and reload manually.
Consul changed that. With dynamic upstream and health checks built in, when a node fails, it gets removed from the upstream automatically and NGINX reloads. No manual intervention. That single capability alone justified the investment.
If you're just getting started, don't try to use everything at once. Get service discovery working first. Understand how agents, servers, and health checks interact. The rest of the tooling will start to make sense once you have that foundation.
---
2. Expect to spend a week learning — then it gets fast
My initial setup took about a week. Not because Consul is badly designed, but because it's a distributed system and you need to genuinely understand the concepts: client agents, server agents, consensus, gossip protocol, the Raft-based leader election.
Once that clicked, things moved quickly. Today, I can deploy a production-ready Consul cluster in one to two hours. The time you invest upfront pays off many times over.
Don't skip the documentation. Don't just copy-paste a config and hope it works. Take the week.
---
3. Consul + Vault is a combination worth building around
One of the best architectural decisions I made was using Consul as the storage backend for HashiCorp Vault. At first it felt like extra complexity, but it fundamentally changed how I think about secret management.
Because Vault's state is stored in Consul, I'm not worried about what happens if my Vault server goes down. The data is safe, replicated, and managed through Consul — a system I already know how to operate well. It also means I can manage the storage layer directly when needed.
If you're running Vault, seriously consider Consul as your storage backend. The operational familiarity you build with one tool transfers directly to the other.
---
4. Automation is the real payoff
My platform and DevOps team has four people. With that headcount, we manage infrastructure that would normally require a much larger team. The reason we can do it is automation — and Consul is a big part of that.
Consul Template lets us drive NGINX configuration dynamically. Terraform provisions the infrastructure. Vault handles secrets. Consul ties it together as the source of truth for what's running and what's healthy.
Almost zero downtime. Faster recovery when things do go wrong. Easy visibility into service state. These aren't marketing claims — they're what you get when the tooling is set up properly.
If your goal is infrastructure automation, Consul should be near the top of your list.
---
5. What I'm still waiting for
No tool is perfect. Two things I'd like to see:
- Non-voter support in the community edition — useful for scaling read capacity without adding voting members to the Raft cluster.
- Autopilot in the community version — currently an enterprise feature, it handles dead server cleanup and other operational tasks automatically. It would make Consul more accessible to smaller teams.
---
Final thought
If you want your infrastructure to be fully automated and resilient, HashiCorp Consul is the first tool I'd recommend. The learning curve is real, but so is the payoff.
I gave it a 9 out of 10 in my PeerSpot review. Six years in, I'd give it the same score today.
---
Read my full PeerSpot review: Automated infrastructure has improved service discovery and secure secret storage
Interested in how we build and operate platform infrastructure at Tech? Get in touch.