Lab 6.1: External Egress Not Working
Hi,
I am not able to get the external egress working in Lab 6.1. It appears to be a different issue @ajain just raised.
When I attach to the container I get the following:
/ $ nc -vz 127.0.0.1 80
127.0.0.1 (127.0.0.1:80) open
/ $ nc -vz www.linux.com 80
nc: bad address 'www.linux.com'
I have validated it is not a VM networking issue because:
a. If I run the command from the node running the container then it works okay
K8s-Minion1:~$ nc -vz www.linux.com 80
Connection to www.linux.com 80 port [tcp/http] succeeded!
b. If I run the busybox container outside of Kubernetes then I can run nc and ping on www.linux.com and they work fine
K8s-Master:~/K8s Training/src/app2$ sudo docker run -ti 10.105.53.127:5000/busybox
/ # nc -vz www.linux.com 80
www.linux.com (151.101.25.5:80) open
nslookup from the container returns:
/ $ nslookup www.linux.com
;; connection timed out; no servers could be reached
K8s-Master:~$ kubectl get pods -o wide --all-namespaces
NAMESPACE NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE
default nginx-6b58d9cdfd-zh2pq 1/1 Running 0 5d 192.168.17.232 k8s-master
default registry-795c6c8b8f-l8wkn 1/1 Running 0 5d 192.168.17.230 k8s-master
default secondapp 2/2 Running 0 28m 192.168.4.140 k8s-minion1
default try1-64889f8759-25n7m 2/2 Running 1 2h 192.168.4.133 k8s-minion1
default try1-64889f8759-42crp 2/2 Running 1 2h 192.168.4.132 k8s-minion1
default try1-64889f8759-985m2 2/2 Running 0 2h 192.168.17.195 k8s-master
default try1-64889f8759-sl2ht 2/2 Running 1 2h 192.168.4.134 k8s-minion1
default try1-64889f8759-zqv5x 2/2 Running 0 2h 192.168.17.199 k8s-master
default try1-64889f8759-zx467 2/2 Running 0 2h 192.168.17.198 k8s-master
kube-system calico-etcd-fgs6g 1/1 Running 5 48d 192.168.108.160 k8s-master
kube-system calico-kube-controllers-55c57d69c8-hd5m5 1/1 Running 5 48d 192.168.108.160 k8s-master
kube-system calico-node-klz88 2/2 Running 16 48d 192.168.108.160 k8s-master
kube-system calico-node-xl5sz 2/2 Running 5 2h 192.168.108.165 k8s-minion1
kube-system etcd-k8s-master 1/1 Running 6 48d 192.168.108.160 k8s-master
K8s-Master:~$ kubectl get svc --all-namespaces
NAMESPACE NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
default kubernetes ClusterIP 10.96.0.1 443/TCP 48d
default nginx ClusterIP 10.110.185.45 443/TCP 48d
default registry ClusterIP 10.105.53.127 5000/TCP 48d
default secondapp NodePort 10.99.24.144 80:32000/TCP 28m
kube-system calico-etcd ClusterIP 10.96.232.136 6666/TCP 48d
kube-system kube-dns ClusterIP 10.96.0.10 53/UDP,53/TCP 48d
kube-system kubernetes-dashboard ClusterIP 10.99.76.220 443/TCP 5d
Comments
-
Hi, there may be a solution posted for this issue:
Lab 6.1 External Egress not working (No policies defined yet):
https://forum.linuxfoundation.org/discussion/comment/21433#Comment_21433Check it out and let us know if it helps.
Regards,
-Chris0 -
Hi,
No, this does not appear to be the same issue.
Thanks0 -
If the IP address works, but not when you use the linux.com name it would seem to be a DNS issue instead of an egress issue. If you use the nc to go to the IP of a public site, for example one IP for linux.com is 151.101.129.5. You can double check with nslookup. Does it work when you use IP but not the name?
Regards,
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
- 176 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
- 143 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)