curl pod
In part 05. WORKING WITH KUBERNETES > Demo: pods, where I'm trying to connect to the container using curl and pod IP, I get this error: curl: (7) Failed to connect to 172.17.0.4 port 80 after 3064 ms: No route to host. Does anybody know why this happens? Is it something I'm doing wrong?
I really appreciate any help you can provide.
Answers
-
Hi pooriamehregan and welcome to the forum!
Can you give a little bit more insight about your setup? Are you using minikube or kubeadm?If you got the right IP from the kubectl describe command then there is probably something wrong with your networking setup.
If you're unsure about the correct setup you can always try something like https://labs.play-with-k8s.com/
0 -
Thanks for the warm welcome, and respons!
I'm using minikube, maybe that's why? The curl command executed fine (with the expected output) when I executed it inside the pod, using minikube dashboard pod's terminal. As you pointed out, it looks like a networking problem, because curl can't seem to find its way to the container when executed from outside the pod.
I tried many things, the next thing on my list was to go back and try kubeadm instead of minikube, whith the correct network setup as you demonstrated in chapter 4.
0 -
I'm sorry... I've been stuck in this part of the course for a few days now. It would help a lot if you could add an additional video where you demonstrate other steps like setting up networking/ports/calcio and stuff like that. After installing kubeadm with this command
kubectl exec sudo kubeadm init --pod-network-cidr=192.168.0.0/16
I have two pods (CoreDNS) that still are not running because calico isn't installed yet, but others are running. After I install calico, I get a connection refused error. First I was following the course and instruction on my local machine, and then on Ubuntu in a VM (KVM).Steps that I take:
Installing containerd
-tar Cxzvf /usr/local containerd-1.6.2-linux-amd64.tar.gz
-install -m 755 runc.amd64 /usr/local/sbin/runc
Installing runc
-install -m 755 runc.amd64 /usr/local/sbin/runc
Installing CNI plugins
-mkdir -p /opt/cni/bin
-tar Cxzvf /opt/cni/bin cni-plugins-linux-amd64-v1.1.1.tgz
Generating toml
-containerd config default > /etc/containerd/config.toml
installing kubeadm
-sudo apt-get update
-sudo apt-get install -y apt-transport-https ca-certificates curl
-sudo curl -fsSLo /etc/apt/keyrings/kubernetes-archive-keyring.gpg https://packages.cloud.google.com/apt/doc/apt-key.gpg
-echo "deb [signed-by=/etc/apt/keyrings/kubernetes-archive-keyring.gpg] https://apt.kubernetes.io/ kubernetes-xenial main" | sudo tee /etc/apt/sources.list.d/kubernetes.list
-sudo apt-get update
-sudo apt-get install -y kubelet kubeadm kubectl
-sudo apt-mark hold kubelet kubeadm kubectl
Creating cluster
-kubectl exec sudo kubeadm init --pod-network-cidr=192.168.0.0/16
Installing calico
-curl https://raw.githubusercontent.com/projectcalico/calico/v3.24.5/manifests/calico.yaml -O
-kubectl apply -f calico.yaml
Would appreciate it a lot if you could help me out of this part
0 -
Hi
kubectl exec sudo kubeadm init --pod-network-cidr=192.168.0.0/16
is not a valid command. It should besudo kubeadm init
only.Your setup SEEMS to be right, but I'm afraid I can't give you a clear solution to your problem. Have you checked the logs of the running pods?
0
Categories
- All Categories
- 60 LFX Mentorship
- 113 LFX Mentorship: Linux Kernel
- 618 Linux Foundation IT Professional Programs
- 321 Cloud Engineer IT Professional Program
- 142 Advanced Cloud Engineer IT Professional Program
- 55 DevOps Engineer IT Professional Program
- 68 Cloud Native Developer IT Professional Program
- 6 Express Training Courses
- 6 Express Courses - Discussion Forum
- 2.3K Training Courses
- 19 LFC110 Class Forum - Discontinued
- 9 LFC131 Class Forum
- 31 LFD102 Class Forum
- 175 LFD103 Class Forum
- 22 LFD121 Class Forum
- 2 LFD137 Class Forum
- 61 LFD201 Class Forum
- 2 LFD210 Class Forum
- 1 LFD210-CN Class Forum
- 1 LFD213 Class Forum - Discontinued
- 128 LFD232 Class Forum - Discontinued
- LFD237 Class Forum
- 23 LFD254 Class Forum
- 653 LFD259 Class Forum
- 108 LFD272 Class Forum
- 1 LFD272-JP クラス フォーラム
- 4 LFD273 Class Forum
- 2 LFS145 Class Forum
- 28 LFS200 Class Forum
- 740 LFS201 Class Forum - Discontinued
- 1 LFS201-JP クラス フォーラム
- 12 LFS203 Class Forum
- 92 LFS207 Class Forum
- 301 LFS211 Class Forum
- 54 LFS216 Class Forum
- 47 LFS241 Class Forum
- 41 LFS242 Class Forum
- 37 LFS243 Class Forum
- 12 LFS244 Class Forum
- 41 LFS250 Class Forum
- 1 LFS250-JP クラス フォーラム
- LFS251 Class Forum
- 142 LFS253 Class Forum
- LFS254 Class Forum
- LFS255 Class Forum
- LFS256 Class Forum
- LFS257 Class Forum
- 1.2K LFS258 Class Forum
- 10 LFS258-JP クラス フォーラム
- 106 LFS260 Class Forum
- 145 LFS261 Class Forum
- 39 LFS262 Class Forum
- 83 LFS263 Class Forum - Discontinued
- 15 LFS264 Class Forum - Discontinued
- 11 LFS266 Class Forum - Discontinued
- 20 LFS267 Class Forum
- 18 LFS268 Class Forum
- 26 LFS269 Class Forum
- 204 LFS272 Class Forum
- 1 LFS272-JP クラス フォーラム
- LFS274 Class Forum
- 3 LFS281 Class Forum
- 249 LFW211 Class Forum
- 177 LFW212 Class Forum
- 9 SKF100 Class Forum
- SKF200 Class Forum
- 907 Hardware
- 220 Drivers
- 74 I/O Devices
- 44 Monitors
- 116 Multimedia
- 210 Networking
- 102 Printers & Scanners
- 86 Storage
- 764 Linux Distributions
- 88 Debian
- 66 Fedora
- 15 Linux Mint
- 13 Mageia
- 24 openSUSE
- 143 Red Hat Enterprise
- 33 Slackware
- 13 SUSE Enterprise
- 357 Ubuntu
- 482 Linux System Administration
- 40 Cloud Computing
- 70 Command Line/Scripting
- Github systems admin projects
- 95 Linux Security
- 80 Network Management
- 108 System Management
- 51 Web Management
- 72 Mobile Computing
- 25 Android
- 32 Development
- 1.2K New to Linux
- 1.1K Getting Started with Linux
- 545 Off Topic
- 132 Introductions
- 223 Small Talk
- 22 Study Material
- 831 Programming and Development
- 282 Kernel Development
- 515 Software Development
- 974 Software
- 260 Applications
- 185 Command Line
- 3 Compiling/Installing
- 119 Games
- 318 Installation
- 65 All In Program
- 65 All In Forum
Upcoming Training
-
August 20, 2018
Kubernetes Administration (LFS458)
-
August 20, 2018
Linux System Administration (LFS301)
-
August 27, 2018
Open Source Virtualization (LFS462)
-
August 27, 2018
Linux Kernel Debugging and Security (LFD440)