Questions tagged [networking]
The networking tag has no usage guidance.
110
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Docker container has a default route I didn't configure
I've set up a semi-optimal IPv6 environment, so nginx running in the container can see the real source IPv6 address instead of the IPv4 userland proxy one from Docker. I confirmed this by looking into ...
- 1
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1
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31
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kubernetes access nodeport fails, master cannot reach workers
I've got an on premise kubernetes cluster with a NodePort service running on port 32001. But in 80% of the cases requests fail:
curl localhost:32001
times out and sometimes it works, results are ...
- 502
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2
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Special DNS for other accessing other cluster's deployment
For accessing local deployment there is service1.namespace1.svc.cluster.local special internal domain name, how can we access other cluster's deployment internally if we have 2 cluster (eg. cluster1 ...
- 113
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22
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Using docker-engine unable to access containers (inside WSL2) from host network
Here is the scenario, I was using Docker Desktop with wsl backed engine and whenever I used to run a container inside my wsl for example:
docker run -d -p 80:80 somecontainer
It was used to be ...
- 101
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16
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How to connect TCP/IP to k8s kind pods from host?
As best I can infer from KIND's docs, host to guess networking sound like it is expected to just work, (except on windows/mac environments due to the nature of boot2docker like network topology on ...
- 101
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19
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How to access Kubernetes cluster network locally?
I have a Kubernetes cluster on Azure that has access to an internal network. There are several websites in this network in *.foo.com domain. I would like to be able to access these websites from my ...
- 101
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27
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Kubernetes networking somehow breaks ROS2 message passing
I have 2 identical docker containers running on separate computers in which I want to run ROS2 nodes communicating with each other (via a VPN).
When I run them as docker containers there is no problem ...
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59
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Cannot install packages with apt in docker image
I'm trying to create my own postgres image that is supposed to connect to a postgreSQL database hosted on AWS RDS, however, I'm having trouble connecting to that database as well as trouble installing ...
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31
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Expose consistent port across many namespaces in a dev k8s cluster
We have a development kubernetes cluster (hosted in EKS) to which engineers push feature branches. Each feature branch creates the same set of Deployments and Services in its own isolated namespace. ...
- 101
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138
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docker port forwarding combined with ssh port forwarding
I have a local machine LOCAL, a remote machine REMOTE, and a docker on the remote machine REMOTEDOCKER.
I have a proxy listening on LOCAL:12345. With ALL_PROXY=socks5h://LOCAL:12345, curl on LOCAL can ...
- 101
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647
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Why k8s with minikube NodePort are not working?
I am using minikube on my windows 11 machine just to start testing k8s. And my NodePorts are not giving an URL, and even when I recover the service's I.P and ports by using kubectl describe and I use ...
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54
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Connecting from Docker container to WSL2 physical machine
We're currently working on porting a stack of NET 4.7 projects to Linux/Docker. Since we're doing it one project at a time, there needs to be network connectivity between Windows projects running on ...
- 11
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48
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Azure AKS Ingress With SSL Access
I have a problem with accessing my .net6 apps. I use AKS Ingress under tls. Also, I use Azure DNS records where IP is the ingress controller load balancer but sometimes the apps are not accessible ...
0
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2
answers
1k
views
Bandwidth utilization by pod on Kubernetes
Can someone tell me how I can get bandwidth usage per pod in Kubernetes from CLI? Ideally, I need something that will extract bandwidth usage for every pod.
- 1
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3
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186
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How to generate a list of every external URL accessed during docker build?
Is there a straight forward way to generate a .txt file containing each URL (or corresponding IP) visited during a docker build process?
Example
An example list might look like this:
# urls.txt
https:/...
- 185
2
votes
2
answers
936
views
I am looking for a production alternative to kubectl port-forward
I want to know what are production alternatives to make http://192.168.49.2:30001 this accessible http://host_machine_ip:8007 here
I have set up minikube cluster with mobile-api service on it.
...
- 23
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358
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ALB causing an additional +150ms latency
I've set up an Application Load Balancer - ECS stack and noticed the ALB is causing latency issues. Direct requests to the Fargate instance have a latency of ~15ms consistently, but requests to the ...
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162
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Docker Container in host mode - Reverse proxy
I have an issue with the docker network host mode. Basically I have a Node.js container running on a local network and I need to access it via a ssh tunnel from a server on the cloud. The server in ...
- 11
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3
answers
1k
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What is the meaning of the podCIDR field in the Node spec in kubenretes?
I've set up a Kubernetes cluster using kubeadm using the command:
$ sudo kubeadm init --pod-network-cidr=192.168.0.0/16 --kubernetes-version=1.24.00
My cluster has 2 worker nodes, and when I run for ...
- 111
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1
answer
2k
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Port forwarding rules with Traefik and Docker.Compose
I'm trying to use Traefik to route to a number of services all running using docker-compose. What I'd like to do is access each service with a prefix, eg: 10.20.30.40/u10/xyz and 10.20.30.40/a10/abc ...
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1
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540
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Docker port mapping across several IPs on same NIC results in error
I have docker stack running on a Raspberry Pi with docker-compose. It’s been going nicely for about a year now, but now I want to bring it to the next level.
The issue is, the stack contains a few ...
2
votes
2
answers
585
views
What is the usage of the cluster external IP address?
I'm confused about the usage of the cluster external IP address.
Is this an address that can be used for ingress to access pods running on the cluster?
If so should this be the same as the control ...
- 21
1
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49
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What does `Networking` refer to in this diagram about Ansible? [closed]
I find a snapshot of ansible execute a Task.
My questions about it: What's Networking in step 7,
does it mean the network devices?
EDIT-01
In this link we can also find the Networking:
Networking –
...
- 111
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24
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Nonchangeable VLAN and ip addresses on a device - how to assign them to individual docker containers
I have a problem in a hardware setup. I have several devices with fixed IP addresses and VLAN IDs that are the same over a couple of devices. They also can't be changed as they are baked into the ...
0
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1
answer
34
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OpenStack API Access over secondary ethernet connection or NIC
I am trying to configure my server to utilize a secondary NIC card. I want the server to publish API access on both NICs at the same time. See the attached picture for a configuration diagram that ...
0
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0
answers
36
views
How are dev servers for testing working and available outside of VPN?
I'm a web developer and at work we have different servers (we call them stands) for testing our deployed app.
In order to deploy our app we connect via ssh to one certain server and start a process in ...
- 101
1
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1
answer
406
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Why does php-fpm show nginx's IP while they are on different containers?
I am trying to set up an Nginx server for the purpose of load balancing between 4 Php-fpm servers. You can access my docker configuration files from this Github repository.
My containers' network ...
- 13
0
votes
1
answer
336
views
How do I disable ICMP echo responses within a Docker container?
I want to be able to change the /proc/sys/net/ipv4/icmp_echo_ignore_all file from within my Docker container, but I get the
bash: /proc/sys/net/ipv4/icmp_echo_ignore_all: Read-only file system
error ...
- 1
0
votes
1
answer
583
views
How are containers secured with MACVLAN networks?
Containers cannot be connected both to an internal bridge and to the host network at the same time, according to this question. However, this is what I need; I want a set of containers to be connected ...
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1
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177
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How to create a VPN Connection to Azure VNet to use the VNet's Public IP Address for internet traffic
I have a number of developers working remotely that need to access external services that require a static IP address.
We created an Azure Virtual Network with a public IP that we wanted to use for ...
- 111
2
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1
answer
545
views
Kubernetes container networking between pods
So I have a few services running using nodejs, in more than one kubernetes pod.
These services obviously need to talk to each other, and be able to find the database included in this kubernetes ...
- 125
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1
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47
views
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
...
- 1,794
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171
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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 ...
- 1,794
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1
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22
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Can I see the values set in `ml2_conf.ini` as a regular OpenStack user (non-admin)?
My company uses a managed instance of OpenStack. I am NOT an administrator on this instance. There is functionality that OpenStack offers behind the enable-ml2-dns configuration options, this is set ...
- 1,794
2
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1
answer
2k
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How to access a container/service port in swarm without publishing the port to the outside world?
It is possible to docker-compose to forward a port to the container from localhost only, by writing the desired ports configure in docker-compose.yml, e.g. 127.0.0.1:8080:80.
In docker swarm this does ...
- 41
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1
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31
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ansible network automation: log commands all commandes from mutiple plays
Trying to write a script to publish basic configurations for any futur new devices. Also assert compliancy of basic configuration for devices in production.
Trying to gather all the lines executed, on ...
- 81
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votes
1
answer
98
views
Random delay in port binding for distributed_virtual_router and router_centralized_snat in openstack neutron
I have created a private network called "Private_Network" in the range of 192.168.220.0/24 plus a virtual router called "Virtual_Router" inside openstack which is connected to the ...
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1
vote
2
answers
57
views
Routing traffic from abc.com to xyz.com/abc
What is the most reliable way to route traffic from abc.com to xyz.com/abc? How does the server at xyz.com know for sure how to route the traffic to the /abc path?
I understand that it might be a lot ...
- 395
1
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1
answer
900
views
Why do I get "Connection Refused" when attempting to connect to IPFS API using HTTP?
Created a Digital Ocean Ubuntu 20.04 droplet and setup an IPFS server node in it based on this tutorial.
If I run the following command in the server
ipfs swarm peers
I get the expected results
In ...
1
vote
1
answer
182
views
How to migrate away from `docker-machine create`?
I have an old script that uses docker-machine create to create an number of Hyper-V VMs and run a server application inside each one, using docker. It was done this way because the application ...
- 141
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votes
1
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480
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What parts of Kubernetes can have IP addresses?
Our network team says there an IP address in a subnet is being claimed and released seemingly at random. They are wondering if Kubernetes could be doing it.
I know that Pods, Services and Nodes can ...
- 206
3
votes
1
answer
575
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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1
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2k
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What do skipped, rescued, and ignored results mean in ANSIBLE playbook execution?
What do skipped, rescued, and ignored results mean in an Ansible playbook execution?
What would be a possible scenario where these results would be different from 0?
PLAY RECAP ************************...
1
vote
1
answer
635
views
Ansible cli_command loop register issues
I can't seem to get the register to works with cli_command and looping of multiples commands. Any suggestions?
-
name: Run show commands
hosts:
- all
connection: network_cli
gather_facts: ...
- 11
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votes
2
answers
399
views
Reaching a Docker environment running in VMware from LAN
Here is my setup:
I have a Ubuntu 20.04.2 LTS machine running in VMware (vSphere client).
On this machine, I have a local Drupal website running in Docker using Wodby Docker4Drupal https://github.com/...
- 51
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votes
2
answers
270
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Limit throughput between Jenkins and Jenkins Agent
I am trying to find a way to throttle the thruput on the request of our Network folks. They want me to not exceed 5.5Mb/sec. Is there a way to do this within Jenkins. Looking at the config files under
...
- 115
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186
views
Service to service communication - through proxy or direct?
A common scenario is two or more services behind a reverse proxy, typically each deployed in a container:
| service 1 | | service 2 |
\ /
\ /
...
- 101
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1
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209
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How to create a local network mapping in linux
I'm deploying nextcloud via docker, however the way the configuration is set up, it creates a subnetwork at 10.10.10.0/24 on the system it's running on instead of running it on 127.0.0.1. Then the ...
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1
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103
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AWS Inspector "High Risk" : port open to the internet with IP whitelisting
We use AWS Inspector to identify risks with our AWS assets. Today I received a finding, with a "high" severity. The finding said that the FTP port was open to the internet. However, after ...
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1
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1k
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Isolate service networks with Docker Compose
I have two containerised services, A and B, with which I wish to isolate network communications with docker compose. There is also a shared service C which is not isolated from A or B and is free to ...
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