Mimir ruler API: endpoint to atomically post a namespace

[hsyed-dojo]

Hey folks,

I am working on a prototype for alerting via code generation that relies on incrementally syncing alerting machinery to mimir. My design uses the namespace as a deletion boundary. So, to update a namespace I delete it and then submit the rulegroups:

func (s *cell) UpsertRuleGroupNamespace(ctx context.Context, ns string, rgs []RuleGroup) error {
	_, err := s.c.DeleteRuleNamespace(ctx, ns)
	if err != nil {
		return fmt.Errorf("could not delete namespace: %s, %w", ns, err)
	}
	for _, rg := range rgs {
		if err = s.c.SetRuleGroup(ctx, ns, rg); err != nil {
			return fmt.Errorf("could not set rulegroup %s:%s, %w", ns, rg.Name, err)
		}
	}
	return nil
}

Would it possible to get an endpoint to post an entire namespace atomically ?

Beyond just making the lives of upstreams easier the server can optimise the operation. Most of the time I foresee a few new rules being added to a single group. However since groups have a limit to how many rules they may contain a generalised code generation strategy will rely on maintaining this invariant with a numbering strategy and splitting groups as needed.