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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1answer
11 views

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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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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1answer
21 views

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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1answer
16 views

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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3answers
60 views

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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38 views

Setting up a coredns DOcker container in WIndows 10

I am testing a web app which uses slugs (a single-component "prefix") in the host name. So for example if the basic hostname is 'surveys.com' there can be others, such as 'admin.surveys.com' or '...
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1answer
26 views

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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0answers
12 views

How to force BIND9 to query all forwarders for a zone and not die if one is not reachable

We have a BIND9 setup to forward only for a particular zone as seen below: options { directory "/var/cache/bind"; recursion yes; allow-transfer {"none";}; allow-query { any; }; allow-...
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1answer
17 views

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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2answers
127 views

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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1answer
15 views

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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1answer
102 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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1answer
44 views

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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1answer
218 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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2answers
513 views

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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1answer
65 views

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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2answers
116 views

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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1answer
90 views

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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1answer
339 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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1answer
202 views

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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2answers
244 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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2answers
2k views

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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1answer
61 views

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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2answers
47 views

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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1answer
432 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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1answer
132 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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1answer
169 views

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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1answer
407 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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2answers
468 views

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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2answers
56 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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1answer
100 views

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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1answer
459 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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1answer
95 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 ...