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Use Unix socket to pass IMAP updates from maddyctl to daemon

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There is abstraction 'updates pipe' defined for future use with
configuration involving IMAP data replication (e.g. multiple nodes with
maddy instances + PostgreSQL replicas + S3 bucket for messages).

However, for the case of local SQLite3 DB, limited UDS-based
implementation is provided. It solves the problem of maddyctl not being
able to tell the server about modifications it makes. Alternative to
this approach would be to have server actually perform operations and
maddyctl being a dumb API client, but this requires a lot more complex
IPC interface and will not work when the server is down.
This commit is contained in:
fox.cpp 2019-12-08 03:27:31 +03:00
parent 9e5bb288b3
commit a574b9fbb2
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GPG key ID: E76D97CCEDE90B6C
10 changed files with 431 additions and 11 deletions
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15
internal/endpoint/imap/imap.go
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@ -24,6 +24,7 @@ import (
modconfig "github.com/foxcpp/maddy/internal/config/module"
"github.com/foxcpp/maddy/internal/log"
"github.com/foxcpp/maddy/internal/module"
"github.com/foxcpp/maddy/internal/updatepipe"
)
type Endpoint struct {
@ -73,6 +74,12 @@ func (endp *Endpoint) Init(cfg *config.Map) error {
return fmt.Errorf("imap: storage module %T does not implement imapbackend.BackendUpdater", endp.Store)
}
if updBe, ok := endp.Store.(updatepipe.Backend); ok {
if err := updBe.EnableUpdatePipe(updatepipe.ModeReplicate); err != nil {
endp.Log.Error("failed to initialize updates pipe", err)
}
}
// Call Updates once at start, some storage backends initialize update
// channel lazily and may not generate updates at all unless it is called.
if endp.updater.Updates() == nil {
@ -105,6 +112,14 @@ func (endp *Endpoint) Init(cfg *config.Map) error {
return err
}
if err := endp.setupListeners(addresses); err != nil {
return err
}
return nil
}
func (endp *Endpoint) setupListeners(addresses []config.Endpoint) error {
for _, addr := range addresses {
var l net.Listener
var err error