Questions tagged [dns]

The Domain Name System (DNS) is a hierarchical naming system built on a distributed database for computers, services, or any resource connected to the Internet or a private network.

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Apex domain to point to an Openshift ROSA application

We have a ROSA (Openshift on AWS) cluster, working fine with all kinds of domains except one, which happens to be an apex of the Hosting Zone in our Route53. So, say, the domain is example.com and it'...
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How to resolve hostnames in Azure VNET by connecting to internal Hadoop On prem DNS Server?

I have an On prem DNS server (10.XX.XXX.XXX) and have an Azure Kubernetes cluster that needs to resolve hostnames in this DNS server? I believe below are the ways to do it? Create an Azure Private ...
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Why there is a DNS with the IP for Pods

In DNS documentation of Kubernetes I found this In general a pod has the following DNS resolution: pod-ip-address.my-namespace.pod.cluster-domain.example. For example, if a pod in the default ...
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How can I find out what ml2 extension drivers are enabled?

According to this document on "The Networking service internal DNS resolution", a feature I need requires the dns extension driver in OpenStack, [ml2] extension_drivers = port_security,dns ...
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How do you enable the DNS extension to ml2 in OpenStack?

In one doc it says, To enable the internal DNS resolution, the neutron-server service must be configured with the dns_domain config option set to a value other than openstacklocal in neutron.conf ...
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Does an FQDN on OpenStack mean there must be a resolver for it?

When I look at different resources on OpenStack, I see a FQDN's like this, host-10-2-67-96.openstacklocal. host-2620-0-28a4-4140-f816-3eff-fefd-6381.openstacklocal. I see this for ports and for NOVA ...
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1 vote
1 answer
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How can you map DNS/host names to their IPs at scale?

We're trying to look at a fairly large httpd config and find the all the IPs/ports we'd have to allow through a new firewall. Ports are easy, but resolving all the DNS names to the (multiple) IPs they ...
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239 views

Access to k3s DNS from host

I have a single node k3s "cluster" with few Services on it. Whenever I want to access to one of them, I'm forced to either do a port-forward or a describe (and get the endpoint, but it ...
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Azure Kubernetes pod is inaccessible from another pod

Internally we have a Spark Executor and Spark Driver running in Kubernetes. When you run a Spark Job in Kubernetes, Spark will create 2 types of pods Spark Drivers and Spark Executors. The Spark ...
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An API to register/transfer domain names [closed]

today I faced a new challenge, I have a system that allows my clients to create/manage x stores. the problem here that i want to be able to create a domain name for each store (based on client ...
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3 votes
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134 views

Point docker container DNS to specific port?

I was wondering if it was possible to assign the DNS server a docker container is querying (via docker run --dns, or otherwise) to be on a specific port, something other than 53? I had built a custom ...
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K8s hosted services external access using dns name

Here is my setup : I have multiple influxdb running inside k8s (deployment), which are currently exposed via a ingress (nginx). My k8s is on-prem. Here is what I'm trying to achieve : I'd like to ...
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How to setup ExternalDNS on Microk8s cluster?

I have a Highly Available, 3 nods, Microk8s cluster with MetalLB and Ingress. The cluster is supposed to serve a website with high availability. I want to enable ExternalDNS for the website with the ...
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Drone is unable to clone GitHub Project

I'm trying to set up drone, but when running a build it fails at the clone step. I'm pretty sure this is a DNS issue and that I just configured the runner wrong, but I just can't figure it out. This ...
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How to change Ip for a DNS

I'll be very direct. I'm tired to search this and do not found anything about it. There is any way to change a lan ip to a dns (not chaging 'hosts' file)? Example: I've a centOs running in machine A ...
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What reasons should I NOT use a private DNS zone and CNAME services in my AWS/K8s environment?

I have a Kubernetes cluster in AWS, with apps that talk to AWS services like RDS, Elasticache, Elasticsearch, DynamoDB, etc. For the services where it's available (Elasticache and RDS, and more ...
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1 answer
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How to access a fully qualified domain name through "localhost"?

About nine minutes into a tutorial on ERPNext I followed directions as: root@mordor:/home/nicholas/git/frappe_docker# root@mordor:/home/nicholas/git/frappe_docker# cat .env LETSENCRYPT_EMAIL=nicholas@...
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2 answers
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DNS Issues with Cloud formation template

I am trying to automate the creation of an EC2 instance with CloudFormation but am running into issues with DNS. Once the instance is created it can't seem to resolve any hostnames. I try to ping a ...
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Can't hit redis using DNS name in multi-container pod on Kubernetes

Can anyone shed some light on why this might not work? I can access redis just fine using the pod's IP address, $ rdcli -h 10.152.183.65 10.152.183.65:6379> but when I try to use the DNS name, I ...
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1 vote
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What are the advantages of using AWS nameservers as opposed to servers provided by other registrars?

I am transfering a domain name from namecheap to aws route 53 service. AWS provides you with three options when transfering: Continue to use the name servers provided by the current registrar or DNS ...
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Find relevant domain/hosted zone under which to host subdomain

Context In Terraform, to create a new domain record, I first need to find the zone under which it should be hosted. E.g. If I want to create a DNS record for mysite.example.com, I'd get the zone ...
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1 vote
1 answer
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AWS Setting instance to use domain from another account

We're transitioning between accounts and we have an app on our new account but we want to use the domain from our old account. We plan on shutting off the old account soon and transitioning everything ...
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Trick a docker containers DNS to resolve a different url

I am not sure I know the terminology to describe this correctly, my apologies. But for a contrived example. Say I have a docker container that runs code that accesses "google.com". But I want all ...
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How to locally resolve host name starting with variable slug?

An app, running on my laptop in development mode, comprises several Docker containers, one of which runs a Django web app. This web app expects to receive HTTP requests using a hostname with a ...
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1 answer
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Why does running echo with exec form in a Dockerfile create /etc/resolv.conf?

I was trying to build a Docker image from a Dockerfile and I had a line in there which reads: RUN ["echo", "'anything'", ">", "./a_file"] This didn't work, and I eventually had to use: RUN ["sh",...
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Does Kubernetes internal networking keep traffic to co-located Pods where possible?

In Kubernetes, if I run a Service Foo on every Node, and also Service Bar on every Node, i.e. with DaemonSets. If a Pod from Service Foo needs to make a request to Service Bar, does Kubernetes ...
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1 answer
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Where do I set that agent certificate for Puppet on Amazon Linux?

I am using: Puppet server version: 1.2.0 Amazon Linux 2 I have master and agent set in /etc/puppet/puppet.conf and currently I get back only the certificate for the master on the master. The agent's ...
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2 votes
1 answer
389 views

service-to-pod communication is broken in kubernetes

I have an in house 5 node cluster running on bare-metal and I am using Calico. The cluster was working for 22 days but suddenly it stopped working. After investigating the problem I found out that the ...
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Route53 DNS records stopped resolving

Last week, my TXT and other DNS records on Route53 stopped resolving: https://dnschecker.org/#TXT/thuijls.net The entries are set like: What else could be missing here? As far as I'm aware, nothing ...
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965 views

Sub-subdomain Domain name for different environment

If we have two components in a API api front-end and we have three environments staging qa development and a domain name superproduct.com What would be the most logical domain spacing: http://...
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docker build throws UnknownHostException with jenkins dind slave + kubernetes plugin

So Jenkins is installed inside the cluster with this official helm chart. And this is my installed plugins as per helm release values: installPlugins: - kubernetes:1.18.1 - workflow-job:2.33 ...
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1 vote
1 answer
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Route53 Routing Policies - Best Policy for US-based Ecommerce?

When I look over the documentation for Route 53 Routing Policies they list 7 different policies. How should I pick the right one if I am building out new infrastructure in AWS for a US-based e-...
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Cloudfront for ELB, automatic redirection

I have a question regarding a redirect (302) that happens when accessing the /admin panel of my Craft CMS application. I've setup CloudFront for my app that runs on Craft 3. DNS points to CF (CNAME), ...
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0 votes
1 answer
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kubernetes statefulset - communicate addresses of other pods when pod launches?

Is there some metadata that I can apply, or some DNS that I can query, such that when a pod is started, the addreses of all the other pods in that statefulset will be somehow made available to the ...
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1 vote
1 answer
1k views

Using Amazon VPC provided DNS trough AWS Site-to-Site VPN

Currently I have an AWS VPC connected to our corporate network using AWS Site-to-Site VPN. I can reach my EC2 instances trough the tunnel by their private IP Address. Inside the VPC each EC2 ...
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Terraform: Route53, LB and CDN interdependencies

My team uses Terraform to deploy the necessary infrastructure. Currently, our stack is composed of: AutoScalingGroup fronted by a Load-Balancer, and a Route53 DNS record that points to this LB; We ...
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1 vote
2 answers
1k views

Accessing External REST api From Wthin Kubernetes Cluster

This is my first foray into Kubernetes land... I'm still pretty shaky on how things work and still wrapping my head around some of the concepts so please bear with me there. The application I am ...
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2 votes
2 answers
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Kubernetes on k3s can't resolve domains from custom dns server (fritz.box with dnsmasq)

I have a dns server running at 192.168.0.19 for custom domains like .fritz.box. Having a single node cluster on k3s, Rancher was installed using a subdomain server2.fritz.box using this command: ...
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2 votes
1 answer
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Docker Containers fails to DNS resolve on subnet 10.0.2.0/24

The ultimate problem I am facing is this: [root@527eb70c04c9 my-service]# ping google.com ping: google.com: Name or service not known Inside my container, I can't resolve public domains, although ...
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2 answers
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Issue with custom domain SSL certification

We are working on saas application which is hosted on app.example.com. Now we are trying to give the option to the users where their own domain or sub domain like dev.stack.com point to my application ...
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-1 votes
1 answer
628 views

Accessing container by domain name

hey guys I have a docker container A with a domain name attached to it on a host B with a domain name attached to it as well.....how can I access the said container A via A's domain name rather than ...
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1 vote
1 answer
169 views

Rancher, Load Balancing and own domain

I have a question about rancher. I'm running my rancher on aws. I have created a new cluster with two nodes (workers) and I have deployed my docker images. Now I wanted to add Load Balancer, but I don'...
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DNS server with api access

Experts, i have a requirement and wanted to find a tool that will be helpful for me. We have a inhouse tool, that will help developers request/lease a VM for a short duration of time. When the VM is ...
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3 votes
1 answer
497 views

Blue/green deployment with micro services and DNS

Currently, we have on our test environment an ECS Cluster with micro services deployed. All micro services are talking to each other through Route53 DNS CNAMEs like service1.company.com, service2....
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2 votes
2 answers
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DNS hosting choices - how to programmatically update DNS settings

I manually update the DNS settings at the registrar for my domains, such as https://domains.google.com/registrar What are people using to automate updates to DNS settings? which registrars have an ...
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3 votes
2 answers
59 views

Are Route 53 DNS records aliasing ELBs guaranteed for their lifetime?

Given a Route 53 DNS record aliasing a (classic) load balancer, and the potential for the load balancer ip to change: Is it possible for the DNS record to guarantee that the provided ips are valid ...
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1 vote
1 answer
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Is it required to move a domain to Google DNS in order to use certbot in kubernetes on Google Cloud platform?

Follow-up to What are trusted providers that offer wildcard certificates and associated costs to be used in an Orchestration Platform like Kubernetes? With https://github.com/jetstack/cert-manager it ...
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2 votes
1 answer
645 views

Debug Docker DNS

In a stack with higher number of services it seems that Docker DNS does not work anymore which leads to effects that container's names are not known even to themselves. While I have filed this bug, I ...
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1 vote
1 answer
117 views

Azure and DNS services

I have a Virtual network (MyVPN) resource in Azure, being a class C network, MyVPN has Azure provided DNS service as DNS servers, so all virtual machines with a NIC connected to this network are able ...
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