[N+] Cluster synchronization #10
Description
Feature Overview
To support ACME-issued certificates in a clustered installation, we need to synchronize the issuer state, issued certificates and challenge data between all the nodes.
This could be unfeasible because of the noreuse shared zone type. Differences in the configuration would cause divergences in the shared memory contents, making it hard to synchronize the state and reap unused objects.
Alternatives Considered
No response
Additional Context
Zone synchronization is another NGINX Plus private API, not exposed in ngx-rust.