Latest Server related questions

Score: 0
What happens to open TCP sessions when a DNAT endpoint is removed in iptables
ng flag

In Kubernetes, when kube-proxy is configured in iptables mode, it will create DNAT rules to forward packets to the service endpoints (the pod IPs). If the service changes its endpoints, and one endpoint is removed, would that affect existing open TCP sockets, or is the kernel stateful in a way that remembers those sessions and they are kept alive until closed by one of the two peers?

Score: 0
Lique avatar
Connection timed out issue with Postfix
cv flag

I wrote a Golang program that sends reports based on a ticker. Those reports are sent by mail using Postfix on a CentOS 7 machine. My problem is that the mail is sent successfully to users inside the same machine, but not to outside email addresses.

I tried this command:

traceroute -n -T -p 25 10.145.3.144

as seen here: Postfix: "Connection timed out" on all outbound email , and I get the same outcome: ...

Score: 0
unbound query logging stops after a period of time
us flag

I have configured unbound to log queries.

I can see queries in the log for a period of several hours, but ultimately, logging of queries stops, until I reload the service, at which point logging starts again.

My limited understanding is that only cache misses are logged, so that after a period of time, the service is able to obtain every response from cache (this is a closed network, so there is a l ...

Score: 0
Rafik avatar
Checking if NIC controller has SR-iov capability
ug flag

I'm trying to use SR-IOV with openstack, and in order to check if the NIC available on my servers support this technolony I did the following:

(venv) [root@controller share]#  lshw -c network -businfo
Bus info          Device      Class          Description
========================================================
pci@0000:02:00.0  eno3        network        NetXtreme BCM5720 Gigabit Ethernet PCIe
p ...
Score: 0
Mr. Blonde avatar
dotnet core web application cannot reach remote SQL Server
tm flag

I have a setup with a dotnet core web application. It is deployed in an Azure VM running Ubuntu. The web is served in nginx. This particular web application accesses a number of different databases. One of these connections is not working when the solution is deployed to the VM. Here are some details:

  • The SQL Server does not run on the default port 1433, but instead 15333 - I do not have control of t ...
Score: 0
user959866 avatar
EC2 instance crashing randomly early morning
do flag

I have a java application running on an ec2 instance. Nginx and mongodb is also running on the instance. The application is accessed through ELB which forwards requests to the instance. I have 2 versions of the exact same instance running with one receiving slightly more traffic than the other (as one serves the assets for both apps). However, only the main, asset-serving, instance falls over.

Mo ...

Score: 1
aesnak avatar
PCS Cluster - Binding nfsserver resource to specific IP
it flag

I'm trying to deploy a HA NFS Cluster Architecture with PCS on Rocky Linux 8.5 . Current kernel and nfs related package versions, pcs configurations are shown with detail below.

I'm not able to declare specific IP for NFSD instances (rpc.statd, rpc.mountd etc) to bind. Whatever i do, services keeps binding 0.0.0.0:$default-ports.

I would like to initiate different "ocf:Hearthbeat:nfsserver" with  ...

Score: 1
nfelger avatar
How to implement caching of HTTP responses in Kubernetes?
sa flag

How can I cache HTTP responses from my services in Kubernetes?

I have a simple web service in my cluster and am wondering how I could cache static assets (static html, images, fonts, etc.) beyond relying on client caches.

My setup is very simple:

 ┌─────────────────┐    ┌─────────────┐   ┌───────────────┠...
Score: 1
Alternatives to vMotion for moving virtual machines to a different Datastore
kr flag

The company i work for is running a small virtual environment and has several virtual servers on 2 different ESXi hosts managed by a vCenter, for reasons relating to backup verification i need to make room on one of the ESXi hosts datastores. The host has a NAS Datastore mounted that still has plenty of room left on it, so i figured it would be a good idea to move a few of the larger VMs there, the Prob ...

Score: 0
minikube not running with virtualbox, how to fix that?
kr flag

I am using windows 10 professional edition. Installed virtualbox and also enable virtualization on bios, that's why able to run windows 10 64bit machines as VMs in virtualbox.

When I started minikube, with below command, getting error as virtualization not enabled.

C:\WINDOWS\system32>minikube start --vm-driver=virtualbox
* minikube v1.19.0 on Microsoft Windows 10 Enterprise 10.0.19044 Build 19044
 ...
Score: 0
Badb0y avatar
Haproxy rate limit monitoring
pm flag

I’m using rate limiting with my haproxy18 and I’d like to somehow squeeze out metrics from it based on ip addresses, who is close to the limit or how the users are hitting the limits.

This is my config related to rate limiting:

...
    stick-table type ip size 1m expire 10s store http_req_rate(10s)

    tcp-request inspect-delay 10s
    tcp-request content track-sc0 src
    http-request deny deny_ ...
Score: -1
Rich M avatar
DC cannot find WSUS server
de flag

We have a domain controller which is stuck in OOBE because it cannot update from WSUS and does not appear in the WSUS console.

When running nslookup wsusservername on the DC we get the following response:

C:\Windows\system32>nslookup wsusservername
Server: dc002.(domain).local
Address: 172.16.164.xx
*** dc002.(domain).local can't find wsusservername: Non-existent domain

All servers are in the sa ...

Score: 1
Noosrep avatar
Google Cloud Directory Sync java nullpointer exception
in flag

I'm trying to do some testing with Google Cloud Directory Sync and Active Directory, but whatever I do, I always get nullpointer exeptions. As far as I can find GCDS is a Java application. The GCDS installer installs a version of the Java run-time environment in a sub-folder so it shouldn't be a issue that the wrong version of java is installed or something like that?

When I try to open a configf ...

Score: 0
Shouma avatar
Squid doesn't cache with Kerberos auth
jp flag

I am using a squid proxy with kerberos auth. Everything works great for months now, but my only problem is, that squid isn't caching anything! As soon as I switch to NTLM auth, squid is caching, so I don't think, that it's a squid config problem. Is caching with kerberos auth generally not working?

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