All Questions
Tagged with kubernetes containers
55
questions
0
votes
1
answer
63
views
Containers can't resolve hostname rke2 cluster
I am currently running into a problem around connecting to websites from an rke2 container. Whenever I try to connect to a site from inside of a container I receive an unknown host error. for example ...
- 1
0
votes
0
answers
91
views
Collecting logs from Kubernetes container file system (not from stdout or stderr)
I am trying to find a way to get Promtail collect logs from a container file system. These logs were not generated using the standard output, which automatically gets discovered by Promtail. They have ...
- 1
0
votes
0
answers
229
views
Kubernetes Cluster Initialization Fails with Kubeadm and CRI-O on Ubuntu 22.04
I am setting up a Kubernetes cluster on Ubuntu Server LTS 22.04 using Vagrant, with Kubernetes version 1.28.7 and CRI-O 1.28.2 as the container runtime. I'm encountering an issue when initializing the ...
1
vote
0
answers
175
views
How to initialize kubeadm in a non-default network interface?
I have been trying to set-up Kubernetes in my university server which has two network interface. The default interface (10...*) is connected to my university network and there is another interface (...
- 111
-1
votes
2
answers
1k
views
Windows: What could be the reason for a "paging file is too small" error even though there is plenty of physical memory available?
In one of our applications, we received an error message indicating "The paging file is too small for this operation to complete" while the application was trying to load a DLL (a .NET ...
- 179
0
votes
0
answers
92
views
How can I find TLS settings for Traefik running in Kubernetes containers, to stop allowing weak cipher suites?
I have some servers that have been flagged as allowing insecure TLS/SSL cypher suites, etc for HTTPS. I need to get it corrected. However, the web servers on them are running from Docker/Kubernetes ...
0
votes
1
answer
775
views
How do I make `ctr image pull` always use a custom `--hosts-dir` without specifying it in the command line?
I've got a custom file in /etc/containerd/certs.d/registry.at.my.company/hosts.toml that has some configuration set up for a local registry container running on my servers. This is working fine when I ...
- 335
0
votes
1
answer
1k
views
OpenSearch Cluster deployment in Kubernetes - Connection Refused Issue 9200 Port
I am running a Kubernetes cluster in AWS EC2 instances.
I have one master node (t2.2large EC2 Instance) and two worker nodes (t2.xlarge EC2 instance). I created the cluster using KubeADM. The cluster ...
- 63
0
votes
0
answers
110
views
Can the host-local CNI IPAM plugin be configured to use a node's PodCIDR?
I am experimenting with the built-in CNI plugins, and I'm unclear about the host-local IPAM plugin. The examples show the plugin being manually configured with the subnet to use for a node, this works ...
- 141
0
votes
1
answer
732
views
k3s fails to parse registries.yaml
I have set up a k3s Kubernetes standalone server with a insecure private registry but k3s fails to pull images from it.
The registries.yaml file is set as documentation says. It is below.
mirrors:
&...
- 101
0
votes
0
answers
100
views
Getting ioctl(setctty): operation not permitted: unknown error in K8S-Docker setup
Getting the permission error when trying to start a container in Ubuntu-AWS virtual machine. I am using kubectl apply -f test.yaml to deploy. Nginx is working normally in the same VM. I tried changing ...
- 1
0
votes
0
answers
39
views
Kubernetes: After building a cluster through Flannel network components, nodes cannot access each other through Flanner network segments
After Kubernetes built a cluster through the Flannel network component, they were unable to access each other through the Flannel network segment, and the master node ping 10.244.2.0 (node1 node ...
- 1
0
votes
0
answers
134
views
Trigger OS shell script post kubernetes container boot
I am running truenas scale 23.01 with kubernetes. On the system I have a container X and a small app Y running natively that interacts with this container through its local IP and port.
Whenever ...
- 101
0
votes
0
answers
72
views
nslookup output shows result and error within a container
/ $ nslookup aplha-sidecar.pa-beta.beta.cloud
Server: 172.20.0.10
Address: 172.20.0.10:53
Name: aplha-sidecar.pa-beta.beta.cloud
Address: 10.151.62.118
Name: aplha-sidecar.pa-...
2
votes
1
answer
519
views
Why "Skaffold" creates 2 different images for each container?
I have a Skaffold file like this:
apiVersion: skaffold/v4beta1
kind: Config
build:
artifacts:
- image: app/auth
context: auth
sync:
manual:
- src: src/**/*.ts
dest: .
...
- 427
2
votes
1
answer
2k
views
kubernetes - assign individual storage to each replica in statefulset
I am running a statefulset in my cluster and am trying to assign each of the replicas (3 in total) to assign their own PVC. Unfortunately, I can only provide 1 name as claimName. How do I make sure ...
- 81
-1
votes
1
answer
904
views
Sonarqube app pod is not connecting with PostgreSQL DB pod when deploying to Kubernetes
I am trying to setup SonarQube in a Kubernetes cluster. The cluster was made using KubeADM in the AWS cloud. I have the following files for the setup.
Sonarqube App Deployment file
Sonarqube App ...
- 63
0
votes
0
answers
376
views
nginx readonly container complains about /var/lib/nginx/off
I am trying to run a nginx container in readonly rootfs but when nginx tries to start it complains about :
[emerg] 10#10: open() "/var/lib/nginx/off" failed (30: Read-only file system)
nginx:...
- 21
0
votes
1
answer
736
views
Can each GPU be used on Kubernetes as dedicated to a specific Pod?
I have the following environment:
Pods: Pod0, Pod1 (launched as a k8s Job)
GPUs: GPU0, GPU1
GPU0 is dedicated to Pod0, and GPU1 is dedicated to Pod1.
There can be multiple Pod0s and Pod1s at the same ...
- 393
0
votes
0
answers
910
views
Access entire filesystem of a container from another container
Hi ServerFault Community.
I am in need of your help with a rather annoying edge case problem, which I hope can spark an universally helpful solution:
I need a solution, similar to a sidecar container, ...
- 101
0
votes
1
answer
187
views
How to re-trigger failed flannel to calico migration?
I have a 3 node kubernetes cluster with k8s 1.22 version with flannel setup and running fine. I did run live migration steps from flannel to calico as describes in here. Cluster migrated to calico ...
- 61
0
votes
0
answers
836
views
PostgreSQL as stateful k8s application - issue with mounted volumes ( in regards to ownership)
I am trying to adopt a stateful k8s PostgreSQL cluster based on this article to the local environment in my company.
EDIT
this is a vmware tanzu cluster, which I do not have not set up myself, so I do ...
- 287
0
votes
0
answers
1k
views
I Could not ping or curl master node flannel interface
I have 3 nodes in the cluster, one is the master node and two are the worker nodes. I use CNI flannel for the Kubernetes cluster. I run an Nginx ingress in my cluster for the load balancer and the ...
1
vote
2
answers
1k
views
How to do live migration from flannel to calico on single node kubernetes cluster?
I am trying to migrate from flannel to calico in k8s cluster. I am able to do it successfully in 3 node cluster. Live migration from flannel to calico is working as described in the documentation.
But ...
- 61
0
votes
1
answer
285
views
Cannot execute dpkg command in kube-proxy container
I'm currently trying to get a list of all installed debian packages (dpkg) on the k8s.gcr.io/kube-proxy:v1.23.2 container.
First I tried to execute dpkg -l in the running container as a part of my ...
- 393
0
votes
1
answer
529
views
Java large heap in container environment
I'm trying to run a Jetty webserver on kubernetes, it needs an extremely huge amount of heap ~ 250 GB in our production environment, ~ 50 GB in our test environment.
I'm using jetty:9.4-jdk11, I'm ...
- 406
2
votes
3
answers
2k
views
Any point in running containers as non-root on openshift
The openshift documentation reads :
To further protect RHCOS systems in OpenShift Container Platform clusters, most containers, except those managing or monitoring the host system itself, should run ...
- 63
0
votes
1
answer
108
views
can different pods run different containerization technologies?
for example, can I have one pod running docker and another running cri-o?
I am new to the world of kubernetes and I've not been able to find the answer in the documentation.
- 103
9
votes
1
answer
14k
views
How to find out PID of the container using crictl
Kubernetes is deprecating Docker as CRI engine. Now there is containerd and CRI-O, which can be used as an alternative to it. Both can be managed via crictl from cri-tools.
I need some common way to ...
- 263
1
vote
1
answer
4k
views
Kaniko (GitLab CI, K8s) can not push to Nexus Repository Manager: UNAUTHORIZED: access to the requested resource is not authorized
my GitLab CI job build a example container image with Kaniko with the GitLab runner on K8s. All services are in my LAN behind a static IP. The build process pulls an ArchLinux image from my first ...
- 73
0
votes
0
answers
2k
views
haproxy logs in a container
I’m struggling to get access and health check logs from haproxy when I run it inside a container, so I’ve followed the instructions in the docs (Setting up logs using Docker | HAProxy Enterprise 2.2r1)...
- 11
7
votes
1
answer
2k
views
SECURITY: Should containers run TLS or can they rely on its sidecar?
I wonder how security experts think about making container traffic secure. Let's take a simple K8S cluster as an example.
I guess we all agree that running HTTPS instead of HTTP within each container ...
- 267
0
votes
2
answers
401
views
Why root user is allowed by default in public cloud Kubernetes services?
In a Kubernetes environment, I suppose that the root user should not be allowed by default to mitigate the risk in case the host OS was accessed from inside a container. This setting should be done by ...
- 1
0
votes
1
answer
2k
views
Starting a container on a Kubernetes cluster from another container
I have two docker containers as follows:
A web server coded in python
A python script which performs a computational activity and then terminates
I want to be able to have the web server start the ...
- 149
1
vote
0
answers
784
views
Why are my Kubernetes worker nodes attempting to pull the infra-pod image when kubelet is run with container-runtime remote?
I have a set of worker nodes that are successfully joining my K8s cluster, but they are failing to schedule any pods due to their inability to pull the infrapod image from the internet. Our cluster is ...
- 131
0
votes
1
answer
545
views
pause a container of a multi container pod in kubernetes
I've a pod with two containers. I need to pause one of them because when it's getting error whole of pod will restart and the second container start all things from beginning. I need to suspend first ...
0
votes
1
answer
329
views
Configuring Kubernetes Ingress
I'm trying to configure Google Kubernetes Engine Ingress properly to a load balanced Docker application which runs on port 3000. I'm clearly making an obvious mistake somewhere, but I have no idea ...
- 171
0
votes
0
answers
71
views
Unknown errors when upgrading/planning Kubernetes cluster upgrade
When upgrading kubernetes cluster with kubeadm, I am seeing the below errors when running "kubeadm upgrade plan".I am not sure how to work around these errors:
I0716 10:45:02.966479 27758 ...
- 101
2
votes
1
answer
458
views
Pod using Vernemq helm package cannot start
I'm using helm to install vernemq on my kubernetes cluster
The problems is it can't start, I accepted the EULA
Here is the log:
02:31:56.552 [error] CRASH REPORT Process <0.195.0> with 0 ...
- 301
0
votes
1
answer
803
views
Can I set 3 containers in a K8s pod, with each one writing in its own volume?
I want to set up a service in a Pod, composed of 3 different containers.
In this container, there is a process that need to write in a file.
The 3 containers write the same thing at almost the same ...
- 3
0
votes
1
answer
637
views
Can I use different container runtimes in a single cluster?
I was looking into different container OS (K3OS, CoreOS, Talos...) and I see that they all come with different container runtime. I was wondering if I can use different container runtime on different ...
1
vote
1
answer
2k
views
Append domain to container hostnames in a Kubernetes StatefulSet
I have created a Kubernetes StatefulSet. There are three pods in the StatefulSet with names mysql-0, mysql-1, and mysql-2 each with a single container.
If I "log" onto the container in pod mysql-1 ...
- 2,721
2
votes
2
answers
600
views
Deploy hundreds of thousands of short lived jobs per day
I have a system that needs to deploy hundreds of thousands of short-lived jobs per day. Each job runs anywhere from a few seconds, to a couple of hours. Each job makes HTTP requests to external web ...
- 121
0
votes
1
answer
299
views
How To Share Volume With Code Files Between Two Containers In A Single Pod?
I created a GKE cluster and inside it I created single pod with 2 conatiners with this yaml settings.
apiVersion: v1
kind: Pod
metadata:
name: django-nginx
spec:
restartPolicy: Never
volumes:
...
- 137
11
votes
3
answers
36k
views
How do I give a docker container its own routable IP on the original network?
Main question
Imagine this scenario.
A network of 192.168.0.0/24.
A computer with hostname 'Docker-Host' is running a docker engine at
192.168.0.2
'Docker-Host' has sshd server running
On 'Docker-...
- 263
4
votes
1
answer
2k
views
Unable to list services in AWS EKS
I'm setting up my first Kubernetes EKS cluster by following the Getting Started guide but I can't get past the step that verifies access with kubectl get svc. Instead of the list of services I'm ...
- 665
0
votes
1
answer
419
views
How to get a file out of a failed build-pod from OpenShift?
I have a buildconfig on OpenShift which fails to build. The output tells me that the server.log file might contain more info. But OpenShift is deleting the build-pod immediately after the run, so I ...
- 483
1
vote
1
answer
2k
views
Kubernetes node breaks on restarting containerd
After upgrading to the latest docker (18.09.0) and kubernetes (1.12.2) my Kubernetes node breaks on deploying security updates that restart containerd.
I have: /etc/docker/daemon.json:
{
"storage-...
- 3,890
1
vote
3
answers
20k
views
Can not find kubectl executable in PATH
Azure Kubernetes Service created and now to open Kubernetes dashboard, following the steps and getting error:
az : ERROR: Can not find kubectl executable in PATH).
PS C:\Program Files (x86)> az ...
- 21
0
votes
1
answer
3k
views
Remote command execution on kubernetes container
I am having kubernetes cluster where I am trying to check disk utilisation of containers running on it.
$kubectl version
Client Version: version.Info{Major:"1", Minor:"5", GitVersion:"v1.5.8", ...
- 1,587