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"
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
kubectlis 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
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