# Config : backend 'HAControlPlaneNodes' uses http-check rules without 'option httpchk', so the rules are ignored

**URL:** <https://discourse.haproxy.org/t/config-backend-hacontrolplanenodes-uses-http-check-rules-without-option-httpchk-so-the-rules-are-ignored/6004>\
**Category:** Help!\
**Created:** [December 7, 2020, 5:20pm UTC](https://discourse.haproxy.org/t/config-backend-hacontrolplanenodes-uses-http-check-rules-without-option-httpchk-so-the-rules-are-ignored/6004 "2020-12-07T17:20:56Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![thanos1983](https://sea2.discourse-cdn.com/flex016/user_avatar/discourse.haproxy.org/thanos1983/32/1321_2.png) [@thanos1983](https://discourse.haproxy.org/u/thanos1983)\
**Post date:** [December 7, 2020, 5:20pm UTC](https://discourse.haproxy.org/t/config-backend-hacontrolplanenodes-uses-http-check-rules-without-option-httpchk-so-the-rules-are-ignored/6004/1 "2020-12-07T17:20:56Z")

</div>

I am following the configurations as documented on the official page [haproxy configuration](https://github.com/kubernetes/kubeadm/blob/master/docs/ha-considerations.md#haproxy-configuration) in order to set an HA k8s cluster with HAProxy.

The cluster can register them self with the LB but I can see the error on the journalctl -xeu haproxy:

```bash
-- Unit haproxy.service has begun starting up.
Dec 07 16:52:43 LB haproxy[28367]: /etc/rc.d/init.d/haproxy: line 26: [: =: unary operator expected
Dec 07 16:52:43 LB haproxy[28367]: Starting haproxy: [WARNING] 341/165243 (28376) : config : backend 'HAControlPlaneNodes' uses http-check rules without 'option httpchk', so the rules are ignored.
Dec 07 16:52:43 LB haproxy[28367]: [OK]
Dec 07 16:52:43 LB systemd[1]: Started SYSV: HA-Proxy is a TCP/HTTP reverse proxy which is particularly suited for high availability environments..
-- Subject: Unit haproxy.service has finished start-up
-- Defined-By: systemd

```

I have tried different configurations:

```bash
http-check send meth GET uri /healthz
http-check expect status 200

```

OR:

```bash
option httpchk GET /healthz
http-check expect status 200

```

But on both cases I am getting this error.

I am running with the latest stable version on LinuxOS:

```bash
$ haproxy -v
HA-Proxy version 2.3.0-1c0a722 2020/11/05 - https://haproxy.org/
Status: stable branch - will stop receiving fixes around Q1 2022.
Known bugs: http://www.haproxy.org/bugs/bugs-2.3.0.html
Running on: Linux 3.10.0-1160.2.2.el7.x86_64 #1 SMP Sat Oct 17 05:06:47 UTC 2020 x86_64

```

Is there any recommendation on how to make the correct configuration?

According to the official documentation [Check an http service](https://www.haproxy.com/documentation/aloha/latest/traffic-management/lb-layer7/health-checks/#check-an-http-service) I am not doing something wrong.