From 67d8f283aac462eae574f619ef0998a1856eec7a Mon Sep 17 00:00:00 2001
From: Tanguy Ortolo <tanguy@ortolo.eu>
Date: Mon, 6 Nov 2023 16:16:33 +0100
Subject: [PATCH] Use new easyKV etcd option to use serializable reads

This is optional, and default to previous behaviour, which is to use
linearizable reads.
---
 pkg/backends/etcd.go | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/pkg/backends/etcd.go b/pkg/backends/etcd.go
index 9e469b3..722c995 100644
--- a/pkg/backends/etcd.go
+++ b/pkg/backends/etcd.go
@@ -44,6 +44,10 @@ type EtcdConfig struct {
 	// The password for the basic_auth authentication.
 	Password string
 
+	// Whether to use serializable reads rather than linearizable ones, see
+	// <https://etcd.io/docs/v3.3/learning/api_guarantees/#linearizability>.
+	UseSerializableReads bool `toml:"use_serializable_reads"`
+
 	// The etcd api-level to use (2 or 3).
 	//
 	// The default is 2.
@@ -101,6 +105,7 @@ func (c *EtcdConfig) Connect() (template.Backend, error) {
 			ClientKey:    c.ClientKey,
 			ClientCaKeys: c.ClientCaKeys,
 		}),
+		etcd.WithSerializableReads(c.UseSerializableReads),
 		etcd.WithVersion(c.Version))
 
 	if err != nil {