# Getting Discourse to see the Prometheus server IP

**URL:** https://meta.discourse.org/t/getting-discourse-to-see-the-prometheus-server-ip/265015
**Category:** Self-hosting
**Tags:** prometheus
**Created:** [June 26, 2020, 8:29pm UTC](https://meta.discourse.org/t/getting-discourse-to-see-the-prometheus-server-ip/265015 "2020-06-26T20:29:07Z")
**Posts on this page:** 1
**Showing post:** 5

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### Author: ![ishan](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/ishan/32/182322_2.png) [@ishan](https://meta.discourse.org/u/ishan)
#### Post date: [June 27, 2020, 7:27am UTC](https://meta.discourse.org/t/getting-discourse-to-see-the-prometheus-server-ip/265015/5 "2020-06-27T07:27:42Z")

</div>

Thanks!

Enabled `cloudflare.template.yml`. 🙂 But if I understand correctly, That was just to disable rate limiting on traffic coming from cloudflare’s IP addresses.

For now, This is what my prometheus config looks like,

```plaintext
scrape_configs:
        - job_name: forum
          scrape_interval: 5s
          scheme: https
          static_configs:
                  - targets:
                          - forum-behind-cloudflare-dns-proxy.com

```

Now, The issue I am facing is, Discourse doesn’t get to see the actual IP address of a request. So, For the allow list approach to work, I have tried this.

1. Added my prometheus server’s IPv6 address to the `DISCOURSE_PROMETHEUS_TRUSTED_IP_WHITELIST_REGEX` env variable in `app.yml`.

2. Hard coded forum’s actual IPv6 address in `/etc/hosts` on the prometheus server. Now, The forum can see the IP address of my prometheus server and allow access to it. 🙂

I still have some other problems, Like, I am running prometheus in a container. `/etc/hosts/ from host is not shared inside the container. So, It keeps resolving forum address to a cloudflare IP and fails during authentication.

I can share `/etc/hosts` from host in docker container like, `-v /etc/hosts:/etc/hosts` while starting up prometheus but that results in a error like,

```plaintext
Get "https://forum-behind-cloudflare-dns-proxy.com:443/metrics": dial tcp [<ipv6-address>]:443: connect: cannot assign requested address

```

Now, I just have to resolve this problem.

Edit #1: Figured this out as well. IPv6 was disabled inside docker container. I can fix it by enabling IPv6 in docker container or just `--net=host`.

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