Then every microservice network in existence is a distributed monolith so long as they communicate with one another.
If you communicate with one another you are serializing and deserializing a shared type. That shared type will break at the communication channels if you do not simultaneously deploy the two services. The irony is to prevent this you have to deploy simultaneously and treat it as a distributed monolith.
This is the fundamental problem of micro services. Under a monorepo it is somewhat more mitigated because now you can have type checking and integration tests across multiple repos.
Make no mistake the world isn’t just library dependencies. There are communication dependencies that flow through communication channels. A microservice architecture by definition has all its services depend on each other through this communication channels. The logical outcome of this is virtually identical to a distributed monolith. In fact shared libraries don’t do much damage at all if the versions are off. It is only shared types in the communication channels that break.
There is no way around this unless you have a mechanism for simultaneous merging code and deploying code across different repos which breaks the definition of what it is to be a microservice. Microservices always and I mean always share dependencies with everything they communicate with. All the problems that come from shared libraries are intrinsic to microservices EVEN when you remove shared libraries.
If you communicate with one another you are serializing and deserializing a shared type. That shared type will break at the communication channels if you do not simultaneously deploy the two services. The irony is to prevent this you have to deploy simultaneously and treat it as a distributed monolith.
This is the fundamental problem of micro services. Under a monorepo it is somewhat more mitigated because now you can have type checking and integration tests across multiple repos.
Make no mistake the world isn’t just library dependencies. There are communication dependencies that flow through communication channels. A microservice architecture by definition has all its services depend on each other through this communication channels. The logical outcome of this is virtually identical to a distributed monolith. In fact shared libraries don’t do much damage at all if the versions are off. It is only shared types in the communication channels that break.
There is no way around this unless you have a mechanism for simultaneous merging code and deploying code across different repos which breaks the definition of what it is to be a microservice. Microservices always and I mean always share dependencies with everything they communicate with. All the problems that come from shared libraries are intrinsic to microservices EVEN when you remove shared libraries.
People debate me on this but it’s an invariant.