Intro Kubernetes Chapter 3 Lab 3,4
I set up a nginx in cluster;
ran
curl 10.99.142.249:80
curl 192.168.100.158:80
curl 10.200.125.2:80
it seem to hang not sure what is wrong
I created the lab environment on my local network
using HA proxy from lab 16.2
I am running kubectl from local machine
I also tried running it from worker node kworker03-test/192.168.100.158
Also a control plane node ...151
kubectl get po,ep,svc | grep nginx
pod/nginx-74d589986c-rpptl 1/1 Running 0 44m
endpoints/nginx 10.200.125.2:80 39m
service/nginx ClusterIP 10.99.142.249 80/TCP 39m
kubectl describe pod nginx | grep Node
Node: kworker03-test/192.168.100.158
Node-Selectors:
kubectl describe po nginx
Name: nginx-74d589986c-qvcq7
Namespace: default
Priority: 0
Node: kworker04-test/192.168.100.159
Start Time: Wed, 06 Jul 2022 12:43:15 -0700
Labels: app=nginx
pod-template-hash=74d589986c
Annotations: cni.projectcalico.org/containerID: 365213920a7dae68499ae1e8aeb26e3157769ef76127e5d08ac578671fca2a74
cni.projectcalico.org/podIP: 10.200.156.129/32
cni.projectcalico.org/podIPs: 10.200.156.129/32
Status: Running
IP: 10.200.156.129
IPs:
IP: 10.200.156.129
Controlled By: ReplicaSet/nginx-74d589986c
Containers:
nginx:
Container ID: containerd://cbe49e74874c0033672e466912573ebd0302556a2552a435fd069a8732ef4d3d
Image: nginx
Image ID: docker.io/library/nginx@sha256:10f14ffa93f8dedf1057897b745e5ac72ac5655c299dade0aa434c71557697ea
Port: 80/TCP
Host Port: 0/TCP
State: Running
Started: Wed, 06 Jul 2022 12:43:28 -0700
Ready: True
Restart Count: 0
Environment:
Mounts:
/var/run/secrets/kubernetes.io/serviceaccount from kube-api-access-x5cdd (ro)
Conditions:
Type Status
Initialized True
Ready True
ContainersReady True
PodScheduled True
Volumes:
kube-api-access-x5cdd:
Type: Projected (a volume that contains injected data from multiple sources)
TokenExpirationSeconds: 3607
ConfigMapName: kube-root-ca.crt
ConfigMapOptional:
DownwardAPI: true
QoS Class: BestEffort
Node-Selectors:
Tolerations: node.kubernetes.io/not-ready:NoExecute op=Exists for 300s
node.kubernetes.io/unreachable:NoExecute op=Exists for 300s
Events:
Type Reason Age From Message
---- ------ ---- ---- -------
Normal Scheduled 117s default-scheduler Successfully assigned default/nginx-74d589986c-qvcq7 to kworker04-test
Normal Pulling 117s kubelet Pulling image "nginx"
Normal Pulled 105s kubelet Successfully pulled image "nginx" in 11.665512029s
Normal Created 105s kubelet Created container nginx
Normal Started 105s kubelet Started container nginx
Comments
-
ok, deleted pod: it seems to work now
tested with:
kubectl exec --stdin --tty nginx-74d589986c-qvcq7 -- /bin/bash
From inside the container -pod
curl 10.200.156.129:80
curl 10.99.142.249:80
pod ip address works as expected<!DOCTYPE html>
html { color-scheme: light dark; } body { width: 35em; margin: 0 auto; font-family: Tahoma, Verdana, Arial, sans-serif; }
Welcome to nginx!Welcome to nginx!
If you see this page, the nginx web server is successfully installed and working. Further configuration is required.
For online documentation and support please refer to nginx.org.
Commercial support is available at nginx.com.Thank you for using nginx.
then the control plane
curl 10.200.156.129:80
curl 10.99.142.249:800 -
I am running a kubectl from local machine outside cluster
I created an ssh tunnel
ssh tunnel load_ip =ip_address_nginx_load_balancer_public
leave this open ssh -L 6443:localhost:6443 user@load_ip
open new terminalI can run kubectl commands:
but it hangs when I run the curl commands0 -
Hi @bdkdavid,
In Lab Exercise 3.4 the assumption is that the kubectl CLI tool runs on a cluster node, having direct access to pod IP addresses and ClusterIP service addresses. In a typical scenario, where kubectl runs remotely on a system outside of the cluster, there is no direct access to pod IP addresses and to ClusterIP service addresses. However, by converting the service to a NodePort type, you should be able to curl to "NodeIP":"NodePort".
Regards,
-Chris0 -
I was able to determine the nodes that the nginx was running and it worked as you have mentioned.
I did not convert it to a nodeport in the yaml or any other method. Is there a reason for that?0 -
Hi @bdkdavid,
Exposing the application through a NodePort type service allows you to reach that application remotely via curl to "NodeIP":"NodePort"
Regards,
-Chris0
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)