Wordpress on Lightsail goes down daily

Question

Hi, I am new to AWS services.

I have bought a domain (on AWS) and created a Wordpress instance on Lightsail (Bundle 0.5GB) and it was working fine. On the second day it went unreachable ("Unhealthy" in the Health Checks).
So I have deleted the Wordpress instance and the DNS; then I made all the steps from beginning and the Wordpress website was again up and working. Today, about 4 hours ago, my Wordpress is again unreachable ("Unhealthy" in the Health Checks).

When I try with a "curl -v" I get:

```
* Trying 3.xx.xxx.x...
* TCP_NODELAY set
* Connected to xxxxxx.org (3.xx.xxx.x) port 80 (#0)
> GET / HTTP/1.1
> Host: xxxxxx.org
> User-Agent: curl/7.64.1
> Accept: */*
```

and it gets stuck there. The static IP and the domain name are correct.

Can it be a Lightsail failure? What I should check?
If useful, I can write IP and domain name in clear.

Since it is a website for helping the Ukraine people, I would really like to get it working asap.

Thanks,
Domenico

Answer

Thanks for the answer John.

Exactly as you wrote: it does work correctly for a while, but then becomes "Unhealthy" and is not reachable any more.
I cannot SSH into the instance when it is not responding.

Today it got "Unhealthy" at 13.56: https://i.ibb.co/xmnfXNK/Screenshot-2022-03-01-at-21-28-36.png

In the metrics:
- AVERAGE CPU UTILIZATION: it is almost always just above the sustainable zone and there is a high spike burst (AVERAGE CPU UTILIZATION) at 10.30; then smaller spikes after 18.00: https://i.ibb.co/b2MwKJx/Screenshot-2022-03-01-at-21-27-58.png
- REMAINING CPU BURST CAPACITY (PERCENTAGE): the graph goes down from 50% to 0.89% at 13.50: https://i.ibb.co/NWQzkX3/Screenshot-2022-03-01-at-21-28-10.png

(sorry, I am not able to directly insert images).

Answer

Now it is not reachable for 2 days in a row.

Answer

Just to be sure, it does work correctly for a while, but then becomes "Unhealthy" and is not reachable any more? Are you able to SSH into the instance when it is not responding? Have you checked the "Metrics" tab to see if anything looks strange in there?

Wordpress on Lightsail goes down daily

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