refactor(observers): use the observers module from the single kernel library - #1940
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…library The charm drops its own cluster topology observer module, observer scripts, and raft-observer systemd templates in favour of the library's observer handlers and package-shipped scripts, ported from the VM and K8s implementations (postgresql-single-kernel-library #258-#263). The charm keeps the event wiring and its _on_cluster_topology_change / _on_raft_reconnect / _on_databases_change handlers, and the observer is now constructed with the charm state and the JUJU_EXECUTABLE literal instead of a magic string; the library dependency is pinned to the migration head via its GitHub archive tarball, which pip hash-verifies like any sdist, so charm builds stay reproducible. Draft pin; flips to the released PyPI version before review. The charm-side script tests moved into the library stack (4/6); the handler tests stay and now patch the library state (peer_relation/peer_members_ips) the handler reads instead of the dropped charm properties. Signed-off-by: Marcelo Henrique Neppel <marcelo.neppel@canonical.com>
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Issue
Follows the observers module migration into the single kernel library (postgresql-single-kernel-library #258-#263).
Solution
The charm drops its own cluster topology observer module, the
cluster_topology_observer/raft_observerscripts, and the raft-observer systemd templates in favour of the library's substrate observers and package-shipped scripts, ported from the VM and K8s implementations. The charm keeps the event wiring and its_on_cluster_topology_change/_on_raft_reconnect/_on_databases_changehandlers; the observer is now constructed with the charm state and theJUJU_EXECUTABLEliteral instead of a magic string.The library dependency is pinned to the migration head via its GitHub archive tarball (url = ".../archive/.tar.gz"), which pip hash-verifies like any sdist, so charm builds stay reproducible. Draft pin: flips to the released PyPI version before review.
The charm-side script tests moved into the library stack (#261); the handler tests stay and now patch the library state (
peer_relation/peer_members_ips) the handler reads instead of the dropped charm properties.Checklist