Latest Server related questions

Score: 0
King David avatar
kernel parameter - net.core.netdev_max_backlog , what happened when its too low
gb flag

we want to understand what are the aspects when net.core.netdev_max_backlog kernel value is very low and not as recommended

on our Linux RHEL machines , the value for this parameter is 1000

since our machines are HADOOP machines ( BIGDATA cluster )

we saw that best practice is to increase the value to 65536

as describe on:

https://datasayans.wordpress.com/2015/11/04/performance-kernel-tuning-for-hadoop ...

Score: 0
frogg avatar
Using Route 53 DNS name to communicate between ec2 instances within a single subnet
ng flag

I have 3 ec2 instances in a single vpc and subnet.

Each ec2 instance has an elastic ip and a route 53 domain name pointing to it. The domain name is set as the host name in Amazon Linux 2. I am able to use their host name when directly going to the web applications or connecting via ssh. The terminal identifies them by this name as well i.e. ec2-user@domain-name.

Each is running a separate web app o ...

Score: 0
Is it possible for a systemd service to update itself?
in flag

Hey faultless server folks,

I'd like to write a systemd service that can update itself.

Specifically, every 5 minutes it should look at Amazon S3 for new versions of its binary and .service files. If they've been updated, it should download and replace them, and then restart itself.

Unfortunately, I understand systemd doesn't allow modification of in-use files.

Is there some standard way to achieve thi ...

Score: 0
DeathS7roke avatar
Having Trouble Identifying TCP Congestion Control Provider option: Default
br flag

I am running a Windows 10 (Version 1909) OS and when I am entering the following command in CMD ...

netsh interface tcp show global

...I am able to see add-on congestion control provider set to "Default"

I would like to know what do you mean by "Default"? Is CUBIC algorithm default or CTCP algorithm default? And how can I verify which is currently running?

Thanks in advance.

Score: 1
MisterniceGuy avatar
Cant set correct .Net version in IIS Server Pool
bi flag

I am trying to setup a .Net based RestApi that should be hosted on a Windows Server running IIS. But for some reason i have no luck getting my pool configured as needit to make it work.

Here is the vendors description of how to go about it. WindWard Docs

It states the following

Click on the "Select…" button next to the "Application pool" text field. Click on the drop down list and select one of the  ...

Score: 0
Making Azure Disks available over the network
ua flag

Traditional network guy here, I've not had a lot of exposure to managing systems (mostly keeping them running until the systems guy/gal gets back) and completely new to working on systems in the cloud.

I've staged my first bundle of servers, waiting for our db guy to build a mongo cluster. I was investigating monitoring and scratching at Log Analytics queries to put alerts on low disk space when  ...

Score: 0
Simple haproxy TCP passthrough results in very slow network transfer speed
br flag

I've setup a simple haproxy instance on a clean install of Debian 10 Buster. I've added some simple necessary config to enable the passthrough to the IP address in question (which has been redacted in the below config).

The config file:

global
    log /dev/log    local0
    log /dev/log    local1 notice

    chroot /var/lib/haproxy
    stats socket /run/haproxy/admin.sock mode 660 level admin expose-f ...
Score: 0
alepage avatar
Different traceroute response times for same path
it flag

When troubleshooting for slow Internet speed on one computer, I am having systematic slower response times between two computers when running tacert, for any domain.They are both connected to the same wifi network.

Both computers are running Windows 11. They are at the exact same distance of the router.

On the first :

tracert google.com

  1     3 ms     2 ms     2 ms  192.168.0.1
  2   123 ms    159 ms  ...
Score: 0
IT_User avatar
ovftool import succeeds but VM is not able to be found
mx flag

So I am importing a VM using the following command:

ovftool.exe --name="test_VM2" --datastore="vsanDatastore" C:\Users\testuser\Desktop\VM_Exports\test_server.ova "[email protected]/TEST/host/GPU Cluster"
Opening OVA source: C:\Users\testuser\Desktop\VM_Exports\test_server.ova
The manifest validates
Opening VMX target: [email protected]/TEST/host/GPU Cluster
Writing VMX file: admini ...
Score: -2
Hoang Pham avatar
Restoring Win server 2008 from full back up?
in flag

I'm having trouble of restoring win server 2008, can anyone help me.

First of all, i got the Power Edge 2900 running raid 1 with 3 disk. Power outage happend, and 2 disks are gone -slot0 and slot1 (both flash yellow led), and controller shows lost configuration, no VD configuration found.

Then I changed the survive disk to slot0, plugin into slot1 a new disk, clear foreign, create new raid 1 (no ini ...

Score: 1
Kubernetes Cert-Manager Expired Certificates
si flag

I inherited a GKE Kubernetes environment and have been trying to figure this out for days but unfortunately just don't know what to try next.

The cluster is setup to use cert-manager (installed via helm) to apply Let's Encrypt certificates to the cluster. For some reason, this has worked perfectly for over two years but starting on 4/16 I started seeing SSL warnings in browsers for all notes on t ...

Score: 0
cyberguest avatar
AKS - Sporadic Ingress/Routing 502 after adding Windows node
gr flag

I have some kind of routing issue when adding a Windows node to an AKS cluster locked down to internal network. With 0 Windows node, ingress works fine, and very reliable. Ingress was setup using this instruction: https://docs.microsoft.com/en-us/azure/aks/ingress-internal-ip?tabs=azure-cli

However, after adding a Windows node (by setting Windows node pool scaling from 0 to 1), before running any pods, ...

Score: 0
Abhishek Jayaram avatar
OS restarting continuously
cl flag

We are having several linux devices running 20.04 LTS server.

Recently one of the devices started restarting continuously(approximately 5 or less minutes between restarts), it was running fine before.

When we checked the syslogs, we see that its abruptly closed, and the services are not gracefully stopped before restart. We are not seeing any log relating to why this happened in the logs.

The following ...

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