Lab 3.4 pt 20 access application

I followed the kubernete site instructions to install clustered k8s. I used Docker instead of CRI-O and installed Calico. Next is the result of my installed lab.
In "Exercise 3.4: Deploy A Simple Application" I tried to access the nginx in my local network using curl, like a solution lab, but nothing happened. I tried to access it using my three IPs: host, pod(group of application) and cluster. Nothing. I would really appreciate if anyone have tips for me about that.
Why is a route not needed? In the first moment, in lab exercise, I didn't see any instruction about networks inside the cluster. The Kubernetes manage all networks automatically?
Please, if anyone knows of a link or article about k8s structure (kubeclt, pod, kubadm, kubelet, etc) send me, because I'm a little confused about the nomeclature.
Obrigado
[root@k8s-master ~]# kubectl get deployments nginx
NAME READY UP-TO-DATE AVAILABLE AGE
nginx 3/3 3 3 3h6m
[root@k8s-master ~]# kubectl get pod
NAME READY STATUS RESTARTS AGE
nginx-7848d4b86f-76fpx 1/1 Running 0 177m
nginx-7848d4b86f-8nlpl 1/1 Running 0 177m
nginx-7848d4b86f-z5cws 1/1 Running 0 3h7m
[root@k8s-master ~]# kubectl get svc nginx
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
nginx ClusterIP 10.110.7.15 80/TCP 3h5m
[root@k8s-master ~]# kubectl get ep nginx
NAME ENDPOINTS AGE
nginx 192.168.0.129:80,192.168.1.131:80,192.168.1.132:80 3h11m
[root@k8s-master ~]# ip -br a
lo UNKNOWN 127.0.0.1/8 ::1/128
ens192 UP 192.168.86.60/24 2804:4cac:400:2400:20c:29ff:fe77:57cc/64 fe80::20c:29ff:fe77:57cc/64
docker0 DOWN 172.17.0.1/16
tunl0@NONE UNKNOWN 192.168.31.128/32
calid03167adb26@if4 UP fe80::ecee:eeff:feee:eeee/64
calibb043632037@if4 UP fe80::ecee:eeff:feee:eeee/64
calieff7138f786@if4 UP fe80::ecee:eeff:feee:eeee/64
[root@k8s-master ~]# hostname -i
192.168.86.60
[root@k8s-master ~]# firewall-cmd --list-ports
6443/tcp 2379/tcp 2380/tcp 10250/tcp 10251/tcp 10252/tcp 10248/tcp 80/tcp
[root@k8s-master ~]# firewall-cmd --list-services
cockpit dhcpv6-client ssh
[root@k8s-master ~]# ip r
default via 192.168.86.1 dev ens192 proto static metric 100
172.17.0.0/16 dev docker0 proto kernel scope link src 172.17.0.1 linkdown
192.168.0.128/26 via 192.168.86.62 dev tunl0 proto bird onlink
192.168.1.128/26 via 192.168.86.61 dev tunl0 proto bird onlink
blackhole 192.168.31.128/26 proto bird
192.168.31.135 dev calid03167adb26 scope link
192.168.31.136 dev calibb043632037 scope link
192.168.31.137 dev calieff7138f786 scope link
192.168.86.0/24 dev ens192 proto kernel scope link src 192.168.86.60 metric 100
[root@k8s-master ~]# cat /etc/os-release
NAME="CentOS Linux"
VERSION="8"
ID="centos"
ID_LIKE="rhel fedora"
VERSION_ID="8"
PLATFORM_ID="platform:el8"
PRETTY_NAME="CentOS Linux 8"
ANSI_COLOR="0;31"
CPE_NAME="cpe:/o:centos:centos:8"
HOME_URL="https://centos.org/"
BUG_REPORT_URL="https://bugs.centos.org/"
CENTOS_MANTISBT_PROJECT="CentOS-8"
CENTOS_MANTISBT_PROJECT_VERSION="8"
Best Answer
-
Hello,
The lab does talk about networking, both in the overview section where it speaks to firewalls, and when you download and examine Calico.
From a quick glance it seems your node IPs are 192.168, which overlaps the default Calico settings. Your node would have a routing issue and sending the curls out of the primary interface instead of across the tunnel and cali interfaces to the other node. If you revisit the installation lab you'll not two steps which speak to this potential issue.
The second issue is using CentOS. It should work, but has not been tested.
The third issue is you have not opened up all ports as the installation exercise declares.
Regards,
0
Answers
-
I will try build my lab again using Ubuntu.
Thank you.
0 -
Hi @ErlisonSantos,
I would also recommend following the installation steps from the lab guide, to ensure that
kubectl
is not run byroot
.Regards,
-Chris0 -
Hi @serewicz and @chrispokorni
It's work.
I apologize for didn't follow the lab solution. I only adjusted my host, nodes and calico.yaml IPs to exclude overlaps.
Thanks a lot
0
Categories
- All Categories
- 144 LFX Mentorship
- 144 LFX Mentorship: Linux Kernel
- 817 Linux Foundation IT Professional Programs
- 368 Cloud Engineer IT Professional Program
- 184 Advanced Cloud Engineer IT Professional Program
- 83 DevOps Engineer IT Professional Program
- 132 Cloud Native Developer IT Professional Program
- 122 Express Training Courses
- 122 Express Courses - Discussion Forum
- Microlearning - Discussion Forum
- 6.7K Training Courses
- 40 LFC110 Class Forum - Discontinued
- 73 LFC131 Class Forum
- 39 LFD102 Class Forum
- 237 LFD103 Class Forum
- 22 LFD110 Class Forum
- 45 LFD121 Class Forum
- 1 LFD123 Class Forum
- LFD125 Class Forum
- 17 LFD133 Class Forum
- 9 LFD134 Class Forum
- 17 LFD137 Class Forum
- 70 LFD201 Class Forum
- 3 LFD210 Class Forum
- 2 LFD210-CN Class Forum
- 2 LFD213 Class Forum - Discontinued
- 128 LFD232 Class Forum - Discontinued
- 1 LFD233 Class Forum
- 3 LFD237 Class Forum
- 23 LFD254 Class Forum
- 721 LFD259 Class Forum
- 110 LFD272 Class Forum
- 3 LFD272-JP クラス フォーラム
- 10 LFD273 Class Forum
- 253 LFS101 Class Forum
- 2 LFS111 Class Forum
- 3 LFS112 Class Forum
- 3 LFS116 Class Forum
- 3 LFS118 Class Forum
- 1 LFS120 Class Forum
- 3 LFS142 Class Forum
- 3 LFS144 Class Forum
- 3 LFS145 Class Forum
- 1 LFS146 Class Forum
- 16 LFS148 Class Forum
- 8 LFS151 Class Forum
- 1 LFS157 Class Forum
- 70 LFS158 Class Forum
- LFS158-JP クラス フォーラム
- 5 LFS162 Class Forum
- 1 LFS166 Class Forum
- 3 LFS167 Class Forum
- 1 LFS170 Class Forum
- 1 LFS171 Class Forum
- 2 LFS178 Class Forum
- 2 LFS180 Class Forum
- 2 LFS182 Class Forum
- 4 LFS183 Class Forum
- 30 LFS200 Class Forum
- 737 LFS201 Class Forum - Discontinued
- 2 LFS201-JP クラス フォーラム
- 21 LFS203 Class Forum
- 118 LFS207 Class Forum
- 2 LFS207-DE-Klassenforum
- LFS207-JP クラス フォーラム
- 302 LFS211 Class Forum
- 55 LFS216 Class Forum
- 54 LFS241 Class Forum
- 43 LFS242 Class Forum
- 37 LFS243 Class Forum
- 13 LFS244 Class Forum
- 6 LFS245 Class Forum
- LFS246 Class Forum
- LFS248 Class Forum
- 111 LFS250 Class Forum
- 1 LFS250-JP クラス フォーラム
- LFS251 Class Forum
- 157 LFS253 Class Forum
- LFS254 Class Forum
- 2 LFS255 Class Forum
- 13 LFS256 Class Forum
- 1 LFS257 Class Forum
- 1.3K LFS258 Class Forum
- 11 LFS258-JP クラス フォーラム
- 116 LFS260 Class Forum
- 156 LFS261 Class Forum
- 43 LFS262 Class Forum
- 82 LFS263 Class Forum - Discontinued
- 15 LFS264 Class Forum - Discontinued
- 11 LFS266 Class Forum - Discontinued
- 23 LFS267 Class Forum
- 25 LFS268 Class Forum
- 29 LFS269 Class Forum
- 7 LFS270 Class Forum
- 200 LFS272 Class Forum
- 1 LFS272-JP クラス フォーラム
- 2 LFS147 Class Forum
- LFS274 Class Forum
- 3 LFS281 Class Forum
- 18 LFW111 Class Forum
- 262 LFW211 Class Forum
- 179 LFW212 Class Forum
- 15 SKF100 Class Forum
- SKF200 Class Forum
- 2 SKF201 Class Forum
- 791 Hardware
- 199 Drivers
- 68 I/O Devices
- 37 Monitors
- 98 Multimedia
- 174 Networking
- 91 Printers & Scanners
- 85 Storage
- 754 Linux Distributions
- 82 Debian
- 67 Fedora
- 16 Linux Mint
- 13 Mageia
- 23 openSUSE
- 149 Red Hat Enterprise
- 31 Slackware
- 13 SUSE Enterprise
- 351 Ubuntu
- 465 Linux System Administration
- 39 Cloud Computing
- 71 Command Line/Scripting
- Github systems admin projects
- 95 Linux Security
- 78 Network Management
- 101 System Management
- 47 Web Management
- 56 Mobile Computing
- 18 Android
- 28 Development
- 1.2K New to Linux
- 1K Getting Started with Linux
- 366 Off Topic
- 114 Introductions
- 171 Small Talk
- 26 Study Material
- 534 Programming and Development
- 304 Kernel Development
- 223 Software Development
- 1.8K Software
- 212 Applications
- 182 Command Line
- 3 Compiling/Installing
- 405 Games
- 311 Installation
- 79 All In Program
- 79 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)