From 07adaf28cc8f570fa6e1a76d9602c455b766a028 Mon Sep 17 00:00:00 2001
From: Dmitrii Dolgov <9erthalion6@gmail.com>
Date: Thu, 5 Mar 2020 10:32:20 +0100
Subject: [PATCH] Extend labels for connection pool

---
 pkg/cluster/util.go | 19 ++++++++++++++++---
 1 file changed, 16 insertions(+), 3 deletions(-)

diff --git a/pkg/cluster/util.go b/pkg/cluster/util.go
index 269e94b17..2f10a1868 100644
--- a/pkg/cluster/util.go
+++ b/pkg/cluster/util.go
@@ -414,11 +414,24 @@ func (c *Cluster) labelsSelector() *metav1.LabelSelector {
 	}
 }
 
+// Return connection pool labels selector, which should from one point of view
+// inherit most of the labels from the cluster itself, but at the same time
+// have e.g. different `application` label, so that recreatePod operation will
+// not interfere with it (it lists all the pods via labels, and if there would
+// be no difference, it will recreate also pooler pods).
 func (c *Cluster) connPoolLabelsSelector() *metav1.LabelSelector {
+	labels := c.labelsSet(false)
+	connPoolLabels := map[string]string{
+		"connection-pool": c.connPoolName(),
+		"application":     "connection-pool",
+	}
+
+	for k, v := range connPoolLabels {
+		labels[k] = v
+	}
+
 	return &metav1.LabelSelector{
-		MatchLabels: map[string]string{
-			"connection-pool": c.connPoolName(),
-		},
+		MatchLabels:      labels,
 		MatchExpressions: nil,
 	}
 }