managing configurations in microservices can be tricky.

hey everyone, i'm wrestling with configuration management as our microservices footprint grows. we're moving away from simple environment variables and looking into more centralized solutions like Consul or etcd. for those of you running many services, how do you manage configs effectively? do you keep configs per service, or try to share common ones? what's your deployment strategy for config changes, rolling updates, blue/green, or something else? curious to hear your real-world experiences