# Can't set up 1 node pxc on kubernetes cluster
**URL:** https://forums.percona.com/t/cant-set-up-1-node-pxc-on-kubernetes-cluster/28160
**Category:** Percona XtraDB Cluster 5.x
**Tags:** mysql, percona
**Created:** [February 1, 2024, 2:55am UTC](https://forums.percona.com/t/cant-set-up-1-node-pxc-on-kubernetes-cluster/28160 "2024-02-01T02:55:52Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@Tu\_n\_Nguy\_n\_Thuc](https://forums.percona.com/u/Tu_n_Nguy_n_Thuc)
#### Post date: [February 1, 2024, 2:55am UTC](https://forums.percona.com/t/cant-set-up-1-node-pxc-on-kubernetes-cluster/28160/1 "2024-02-01T02:55:52Z")
I’m a newbie of percona xtradb cluster. When i set up the size of pxc to 1 to deploy mysql server to kubernetes cluster the result is 3 pxc node. This is my code:
apiVersion: [pxc.percona.com/v1](http://pxc.percona.com/v1)
kind: PerconaXtraDBCluster
metadata:
name: cluster1
spec:
crVersion: 1.13.0
pxc:
size: 1
image: perconalab/percona-xtradb-cluster:8.0.32-24.2
resources:
requests:
memory: 500M
cpu: 300m
volumeSpec:
persistentVolumeClaim:
resources:
requests:
storage: 10G
and this is my result:
cluster1-pxc-0 2/2 Running 0 2d16h
cluster1-pxc-1 2/2 Running 1 (2d16h ago) 2d16h
cluster1-pxc-2 2/2 Running 0 2d16h
Can anyone explain this to me?
---
### Author:  [@lalit.choudhary](https://forums.percona.com/u/lalit.choudhary)
#### Post date: [February 1, 2024, 5:10am UTC](https://forums.percona.com/t/cant-set-up-1-node-pxc-on-kubernetes-cluster/28160/2 "2024-02-01T05:10:08Z")
Hello @Tu_n_Nguy_n_Thuc
Is there any specific reason for using a 1 node PXC cluster?
The size of the Percona XtraDB cluster must be 3 or 5 for [High Availability](https://www.percona.com/doc/percona-xtradb-cluster/5.7/intro.html). other values are allowed if the `spec.allowUnsafeConfigurations` key is set to true
Ref: [Custom Resource options - Percona Operator for MySQL based on Percona XtraDB Cluster](https://docs.percona.com/percona-operator-for-mysql/pxc/operator.html?h=pxc#pxc-section)
**Example:**
```auto
allowUnsafeConfigurations: true
pxc:
size: 1
image: percona/percona-xtradb-cluster:8.0.32-24.2
```
```auto
kubectl apply -f deploy/cr.yaml -n pxc
$ kubectl get pods -n pxc
NAME READY STATUS RESTARTS AGE
percona-xtradb-cluster-operator-77c67b5dfc-ckjf8 1/1 Running 0 21m
cluster1-pxc-0 3/3 Running 0 56s
cluster1-haproxy-0 2/2 Running 0 21m
cluster1-haproxy-1 2/2 Running 0 18m
cluster1-haproxy-2 2/2 Running 0 17m
```
If you are looking for single primary setup , you might check [Percona Operator for MySQL](https://github.com/percona/percona-server-mysql-operator)
Note: It is **a tech preview release** and it is **not recommended for production environments**. **As of today, we recommend using** [Percona Operator for MySQL based on Percona XtraDB Cluster](https://www.percona.com/doc/kubernetes-operator-for-pxc/index.html), which is production-ready and contains everything you need to quickly and consistently deploy and scale MySQL clusters in a Kubernetes-based environment, on-premises or in the cloud.
---
### Author:  [@Tu\_n\_Nguy\_n\_Thuc](https://forums.percona.com/u/Tu_n_Nguy_n_Thuc)
#### Post date: [February 1, 2024, 6:16am UTC](https://forums.percona.com/t/cant-set-up-1-node-pxc-on-kubernetes-cluster/28160/3 "2024-02-01T06:16:28Z")
Thank you for your answer, I have read the document about percona XtraDB cluster and it say that I can create 1 node PXC cluster so I just want to test this case.