Is it possible to get CPU alerts on LightSail servers?
It seems like CloudWatch is not connected to LightSail, but I find it hard to believe there's no such option.
It is now. Check out https://aws.amazon.com/about-aws/whats-new/2020/02/amazon-lightsail-now-supports-resource-monitoring-alarming-and-notifications/ for more information.
No, that is not possible to get CPU usage alert from lightsail server. You may get good idea from this answere
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I'm setting up the infrastructure for a Ray project and would like to use an external redis (i.e one not started by ray --head. However that currently does not seem possible, giving me:
If --head is passed in, a Redis server will be started, so a Redis address should not be provided.
Has anyone managed to use an external Redis not managed by Ray?
Regards,
Niklas
There's an ongoing project to improve this limitation. https://github.com/ray-project/ray/pull/6763
The idea is to make GCS as a service that you can use various external backends.
Is it possible to run Hangfire on AWS Elasticache?
Amazon says Elasticache implements Reddis protocols and Hangfire Pro is supports Reddis, so in theory it should be possible. Does anyone know if it's possible in practice?
Some customers of mine are using Hangfire.Redis with AWS Elasticache. However, please note that SSL isn't supported by Hangfire.Redis yet.
I am looking for the best way to achieve high availability for my organizations applications. Since they contain sensitive information, the applications must reside inside my organizations data centers.
I was thinking of using Google load balancing to direct requests to my servers, but I don't think they can be pointed at external servers, just Google VMs. Does anyone know if that's true?
My other thought was that I could use Google load balancing to point to Google VMs running Nginx and have that load balance between my data centers. Does anyone know if that is feasible? Under this scenario, can I terminate SSL on my servers, or does it have to terminate at the Google VM?
Unfortunately, you are correct: You cannot use Google Cloud's Network load-balancing with external servers.
You could do your second option, but I'd strongly suggest you reconsider the approach: too many moving parts, and for what benefit? If a server goes down you lose session state anyway, so maybe it'd be better for you to use DNS load balancing instead.
FYI I use Google LoadBalancing and AutoScaling, it works pretty good, but not perfect (frequent 502 burps), which is probably why it's still in "Beta".
AWS ElastiCache servers with redis come in everything from very small to very large multi cpu boxes. But redis is single threaded. Anyone know what Amazon is doing to make it use all the cores? I'm assuming that they do, otherwise it's kind of strange that they would be offering it.
The response from AWS was that redis is indeed single threaded. But it's a good suggestion to have more than one CPU to handle OS and network chores, so that Redis gets the resources to run. This makes sense.
We have many Apache instances all over our intranet. Some instances run on the same machine. Some instances run on different machines.
I need a tool that can manage these instances from one central location.
Get CPU stats
Get Connection stats
Stop/start Apache instances
Get access to error log
I looked at webmin, but the documentation isn't too clear how it works. Without installing it I'd have trouble getting it to go.
Any recommendations?
I've never used it myself, but I've seen people with monitoring requirements be very happy with Cacti. Besides general health monitoring like CPU stats it has an extremely simple Apache stats plugin that might do what you need:
Script to get the requests per second and the requests currently being processed from
an Apache webserver.
maybe you can put something together with that.