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DevOps & observability · #consul
Stop relying on fragile firewall rules. Learn how to use Consul Connect Intentions to declaratively control service-to-service communication without changing a single line of code.
Learn how to use Consul's health-aware DNS to prevent routing traffic to failing service instances, including configuration examples and DNS caching pitfalls.
Stop relying on static IP addresses in your microservices. Learn how Consul uses a service registry and health checks to provide dynamic DNS-based discovery.
Learn how to use Consul Prepared Queries to create stable, named service filters for DNS and HTTP, reducing application complexity and managing failover targets.
Nomad’s template stanza lets you inject dynamic configuration from Consul KV or Vault into your tasks, automatically restarting or signaling the process when values change. This guide shows how to set up a template, explains change modes, and covers common pitfalls and verification steps.
When a Consul server node becomes unreachable, the cluster marks it as failed and updates the service catalog. What systematic steps should an operator take to confirm the failure, distinguish it from a network partition, and safely restore the node? Include which Consul CLI commands to run, how to interpret logs and health checks, and what actions to perfor
Limits of TLS certificate validation in Consul DNS proxy for upstream DNS‑over‑TLS The Consul DNS proxy can forward queries to external DNS resolvers using DNS‑over‑TLS (DoT). Documentation states that the proxy does not perform TLS certificate validation on the upstream server; the client must handle verification. This leaves an unresolved decision about wh
Consul Raft snapshots capture the entire Raft state at a specific index and term, including the KV store, service catalog, prepared queries, ACLs, and Connect CA and intentions data. Snapshot restore is destructive and overwrites the full Raft state on the target server. The integration boundary between the snapshot mechanism and the data plane state is the
When migrating a small application to new infrastructure using Consul for service discovery, the goal is to achieve zero downtime by leveraging health checks to steer traffic. In this architecture, the Consul DNS interface is used to resolve healthy service instances. A potential conflict arises when a service instance is marked as critical . While the Consu
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