- NGINX PLUS in K8s - Demos
git clone https://github.com/alexeadem/nginx-plus-demos.git
cd nginx-plus-demos/licenses
Copy your licenses under
licensesand run./validate-licenses.sh
./validate-licenses.sh
Certificate will not expire
in the next 15 days
Certifcate expiration [ OK ]
notBefore=Jul 30 12:20:00 2018 GMT
notAfter=Jul 27 12:20:00 2028 GMT
subject=C = RU, ST = Moscow, L = Moscow, O = NGINX Inc, OU = Client certificates, CN = A-S00072502
Certificate pair match [ OK ]
qbo add cluster -w3 -p5000 -d`hostname`
[2020/10/02 14:32:28:0991] N: master.d5540.eadem.com ready
[2020/10/02 14:33:30:1159] N: worker-353c5fdc.d5540.eadem.com ready
[2020/10/02 14:34:20:8543] N: worker-03f50753.d5540.eadem.com ready
[2020/10/02 14:35:22:7378] N: worker-6e9bcb57.d5540.eadem.com ready
kubectl get nodes
NAME STATUS ROLES AGE VERSION
master.d5540.eadem.com Ready master 4m6s v1.18.1-dirty
worker-03f50753.d5540.eadem.com Ready <none> 113s v1.18.1-dirty
worker-353c5fdc.d5540.eadem.com Ready <none> 2m54s v1.18.1-dirty
worker-6e9bcb57.d5540.eadem.com Ready <none> 61s v1.18.1-dirty
qbo get nodes
c9a6532d01e6 worker-6e9bcb57.d5540.eadem.com 172.17.0.6 eadem/node:v1.18.1 running
0924454fe5f1 worker-03f50753.d5540.eadem.com 172.17.0.5 eadem/node:v1.18.1 running
60e28030e3de worker-353c5fdc.d5540.eadem.com 172.17.0.4 eadem/node:v1.18.1 running
e60d01ebc96f master.d5540.eadem.com 172.17.0.3 eadem/node:v1.18.1 running
For more details on the QBO installation go to: https://github.com/alexeadem/qbo-ctl
kubectl apply -f https://raw.githubusercontent.com/alexeadem/qbo-ctl/master/conf/registry.yaml
persistentvolumeclaim/registry-data created
persistentvolume/registry-data created
replicationcontroller/registry created
service/registry created
curl localhost:5000/v2/_catalog
{"repositories":[]}
docker build -t nginx-plus:22-r1 --build-arg version=22-r1 -f nginx-plus/Dockerfile .
docker tag nginx-plus:22-r1 localhost:5000/nginx-plus:22-r1
docker push localhost:5000/nginx-plus:22-r1
kubectl apply -f nginx-plus/k8s
kubectl get pods
NAME READY STATUS RESTARTS AGE
nginx-plus-c7958bcd6-85dr4 1/1 Running 3 101s
nginx-plus-upstream-6778787f99-vwmrg 1/1 Running 0 101s
kubectl get svc
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
kubernetes ClusterIP 172.16.0.1 <none> 443/TCP 12m
nginx-plus NodePort 172.16.143.152 <none> 80:30080/TCP,443:30443/TCP 2m10s
nginx-plus-upstream ClusterIP None <none> <none> 2m10s
qbo get nodes
c9a6532d01e6 worker-6e9bcb57.d5540.eadem.com 172.17.0.6 eadem/node:v1.18.1 running
0924454fe5f1 worker-03f50753.d5540.eadem.com 172.17.0.5 eadem/node:v1.18.1 running
60e28030e3de worker-353c5fdc.d5540.eadem.com 172.17.0.4 eadem/node:v1.18.1 running
e60d01ebc96f master.d5540.eadem.com 172.17.0.3 eadem/node:v1.18.1 running
curl 172.17.0.4:30080
Status code: 200
Server address: 192.168.6.193:8096
Server name: nginx-plus-upstream-6778787f99-vwmrg
Date: 02/Oct/2020:14:45:17 $0000
User-Agent: curl/7.69.1
Cookie:
URI: /
Request ID: 779da9d538851beb1d30bbf66db19704
cd ..
git clone https://github.com/nginxinc/kubernetes-ingress.git
cd kubernetes-ingress
git checkout tags/v1.9.0
cp licenses/nginx-repo.crt licenses/nginx-repo.key ../kubernetes-ingress/
cd ../kubernetes-ingress/
make DOCKERFILE=DockerfileForPlus VERSION=v1.9.0 PREFIX=localhost:5000/nginx-plus-ingress
kubectl create namespace nginx-ingress
kubectl apply -f nginx-plus-ingress/k8s/deployments/rbac/rbac.yaml
kubectl apply -f nginx-plus-ingress/k8s/deployments/common/ns-and-sa.yaml
kubectl apply -f nginx-plus-ingress/k8s/deployments/common/nginx-config.yaml
kubectl apply -f nginx-plus-ingress/k8s/deployments/common/ts-definition.yaml
kubectl apply -f nginx-plus-ingress/k8s/deployments/common/vs-definition.yaml
kubectl apply -f nginx-plus-ingress/k8s/deployments/common/vsr-definition.yaml
kubectl apply -f nginx-plus-ingress/k8s/deployments/common/policy-definition.yaml
kubectl apply -f nginx-plus-ingress/k8s/deployments/common/ingress-class.yaml
kubectl apply -f nginx-plus-ingress/k8s/deployments/common/default-server-secret.yaml
kubectl apply -f nginx-plus-ingress/k8s/deployments/deployment/nginx-plus-ingress.yaml
kubectl apply -f nginx-plus-ingress/k8s/tcp-udp/nginx-plus-config.yaml
kubectl get pods -n nginx-ingress -o wide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
nginx-ingress-7f9d695cbd-8ctv5 1/1 Running 0 52s 192.168.150.135 worker-353c5fdc.d5540.eadem.com <none>
Note that the the ingress is running in worker node
worker-6e9bcb57.d5540.eadem.com.
qbo get nodes
c9a6532d01e6 worker-6e9bcb57.d5540.eadem.com 172.17.0.6 eadem/node:v1.18.1 running
0924454fe5f1 worker-03f50753.d5540.eadem.com 172.17.0.5 eadem/node:v1.18.1 running
60e28030e3de worker-353c5fdc.d5540.eadem.com 172.17.0.4 eadem/node:v1.18.1 running
e60d01ebc96f master.d5540.eadem.com
curl 172.17.0.3:5000/v2/_catalog
{"repositories":["nginx-plus","nginx-plus-ingress"]}
Relevant ConfigMap
nginx-plus-ingress/k8s/tcp-udp/nginx-plus-config.yaml
upstream registry-tcp {
zone registry-tcp 64k;
server registry.kube-system.svc.cluster.local:5000 resolve;
}
server {
listen 5000;
proxy_pass registry-tcp;
status_zone registry-tcp;
}
nslookup registry.kube-system.svc.cluster.local 172.17.0.3
Server: 172.17.0.3
Address: 172.17.0.3#53
Name: registry.kube-system.svc.cluster.local
Address: 172.16.69.112
Relevant ConfigMap
nginx-plus-ingress/k8s/tcp-udp/nginx-plus-config.yaml
upstream coredns-udp {
zone coredns-udp 64k;
server kube-dns.kube-system.svc.cluster.local:53 resolve;
}
server {
listen 53 udp;
proxy_pass coredns-udp;
proxy_responses 1;
status_zone coredns-udp;
}
kubectl logs -f -lapp=nginx-ingress -n nginx-ingress
In this demo you'll be running two ingresses. The OSS nginx ingress and the nginx plus ingress. The nginx OSS ingress will be running in the master and the nginx plus ingress will be running in one of the worker nodes. Both ingress will be using different namespaces.
Deploy Nginx Plus Ingress. Follow step 6.
kubectl get pods -n nginx-ingress -o wide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
nginx-ingress-7f9d695cbd-8ctv5 1/1 Running 0 125m 192.168.150.135 worker-353c5fdc.d5540.eadem.com <none> <none>
kubectl get pods -lapp.kubernetes.io/component=controller -n ingress-nginx -o wide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
ingress-nginx-controller-679d8fd6f6-d2zwv 1/1 Running 0 3h13m 192.168.43.196 master.d5540.eadem.com <none> <none>
You can see that the OSS nginx ingress is running in the master node master.d5540.eadem.com
c9a6532d01e6 worker-6e9bcb57.d5540.eadem.com 172.17.0.6 eadem/node:v1.18.1 running
0924454fe5f1 worker-03f50753.d5540.eadem.com 172.17.0.5 eadem/node:v1.18.1 running
60e28030e3de worker-353c5fdc.d5540.eadem.com 172.17.0.4 eadem/node:v1.18.1 running
e60d01ebc96f master.d5540.eadem.com 172.17.0.3 eadem/node:v1.18.1 running
and ip 172.17.0.3
The following configuration is used in the deployment to run the ingress in the master node.
nodeSelector:
ingress-ready: 'true'
tolerations:
- effect: NoSchedule
key: node-role.kubernetes.io/master
operator: Equal
kubectl get pods -n nginx-ingress -o wide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
nginx-ingress-7f9d695cbd-8ctv5 1/1 Running 0 137m 192.168.150.135 worker-353c5fdc.d5540.eadem.com <none> <none>
And you can see that nginx plus ingress is running in worker node worker-353c5fdc.d5540.eadem.com
and ip 172.17.0.4
In order you using multiple ingress you need to define classes. In nginx-plus-ingress/k8s/deployments/deployment/nginx-plus-ingress.yaml, you can see the following
args:
- -ingress-class=plus
- -use-ingress-class-only
The first argument -ingress-class=plus tells nginx plus ingress be assigned to the plus class. And the second one -use-ingress-class-only tell nginx plus ingress to take only ingresses with plus configuration class.
For more info on classes:
https://docs.nginx.com/nginx-ingress-controller/installation/running-multiple-ingress-controllers/
In order the use the nginx plus ingress the following annotation will need to be added
metadata:
annotations:
kubernetes.io/ingress.class: "plus"
See
nginx-plus-ingress/k8s/complete-example/cafe.yamlfor configuration If no annotation is added the OSS nginx will pick up the ingress
kubectl apply -f nginx-plus-ingress/k8s/complete-example
Check that your test app is running
kubectl get pods
NAME READY STATUS RESTARTS AGE
coffee-5f56ff9788-qfn4m 1/1 Running 0 60s
coffee-5f56ff9788-t9bkz 1/1 Running 0 60s
nginx-plus-c7958bcd6-85dr4 1/1 Running 3 3h46m
nginx-plus-upstream-6778787f99-vwmrg 1/1 Running 0 3h46m
tea-69c99ff568-4jjz7 1/1 Running 0 60s
tea-69c99ff568-bn5j5 1/1 Running 0 60s
tea-69c99ff568-mt8k4 1/1 Running 0 60s
kubectl get pod -lapp=nginx-ingress -n nginx-ingress -o wide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
nginx-ingress-7f9d695cbd-8ctv5 1/1 Running 0 177m 192.168.150.135 worker-353c5fdc.d5540.eadem.com <none> <none>
qbo get nodes
c9a6532d01e6 worker-6e9bcb57.d5540.eadem.com 172.17.0.6 eadem/node:v1.18.1 running
0924454fe5f1 worker-03f50753.d5540.eadem.com 172.17.0.5 eadem/node:v1.18.1 running
60e28030e3de worker-353c5fdc.d5540.eadem.com 172.17.0.4 eadem/node:v1.18.1 running
e60d01ebc96f master.d5540.eadem.com 172.17.0.3 eadem/node:v1.18.1 running
The ingress is running in worker node worker-353c5fdc.d5540.eadem.com with IP 172.17.0.4
And finally test the nginx plus ingress
curl https://cafe.example.com/coffee -k --resolve cafe.example.com:443:172.17.0.4
Server address: 192.168.14.4:8080
Server name: coffee-5f56ff9788-t9bkz
Date: 02/Oct/2020:18:34:52 +0000
URI: /coffee
Request ID: 4867ceb1d1d153a3fbd4487ce5af1f4b
Note that if you try the other ingress running in the master node the request will fail
curl https://cafe.example.com/coffee -k --resolve cafe.example.com:443:172.17.0.3
<html>
<head><title>404 Not Found</title></head>
<body>
<center><h1>404 Not Found</h1></center>
<hr><center>nginx/1.17.10</center>
</body>
</html>
Once you deploy the ingress you should see that the cafe ingress has been picked up and added by the right nginx plus ingress
kubectl logs -f nginx-ingress-7f9d695cbd-8ctv5 -n nginx-ingress
I1002 18:28:22.811121 1 event.go:278] Event(v1.ObjectReference{Kind:"Ingress", Namespace:"default", Name:"cafe-ingress", UID:"b6bd8d64-8255-492b-a930-108175b503ef", APIVersion:"extensions/v1beta1", ResourceVersion:"38662", FieldPath:""}): type: 'Normal' reason: 'AddedOrUpdated' Configuration for default/cafe-ingress was added or updated
This demo simulates communication between cars (clients) sending their VINs numbers to Nginx Plus for routing to a specific backend: Either DEV or PROD. Nginx will receive the car request and pass it to a VIN Router which will set
the specific environment based on the VIN number in the body response back to Nginx Plus. Using NJS Nginx Plus will parse the environment variable Env and proxy the car request to either PROD or DEV.
Note
apk add nginx-plus-module-njsis added in Dockerfile. Andload_module modules/ngx_http_js_module.so;innginx-plus/etc/nginx/nginx.conf. Adding the module when building the image and enabling it in the configuration is required in order to use NJS.
Relevant config njs/nginx-plus-conf-d.yaml
js_import conf.d/vinrouter.js;
map $http_CCRT_Subject $ccrtSubject {
"" ""; # is empty
default 1; # not empty
}
# Check CN value in CCRT-Subject Header exists and
# set $ccrtSubject_vin to the value CN
# e.g. CN=xxxxxxxxxxxxx
map $http_CCRT_Subject $ccrtSubject_vin {
default ""; # is empty
# Case senstive (~) matching
"~CN=(?<vin>[0-9A-Z]+)[,/]?" $vin; # not empty
}
map $route $upstream {
default production;
PROD production;
DEV dev;
}
# nginx.local HTTP
server {
listen 80 default_server;
server_name nginx.local "";
status_zone nginx.local_http;
proxy_intercept_errors on; # Do not send backend errors to the client
default_type application/json; # If no content-type then assume JSON
error_log /var/log/nginx/error.log debug;
location / {
auth_request /get_env_trampoline;
auth_request_set $route $sent_http_env;
if ($ccrtSubject_vin = "") {
return 400;
}
proxy_pass_request_body on;
add_header X-Body $request_body;
proxy_pass http://$upstream;
}
location = /get_env_trampoline {
internal;
proxy_pass http://127.0.0.1:8001/get_env;
proxy_pass_request_body off;
proxy_set_header Content-Length "";
}
kubectl apply -f njs
Test Prod
Adding a letter in front of the VIN will route to PROD
curl http://nginx.local/web-services/user-data/1.1/auto-get-profiles-timestamp -H 'CCRT-Subject: C=DE, O=Daimler AG, OU=MBIIS-CERT, CN=ADF4477' --resolve nginx.local:80:172.17.0.3
{
"environment": "production"
}
Test Dev
Adding a number in front of the VIN will route to DEV
curl http://nginx.local/web-services/user-data/1.1/auto-get-profiles-timestamp -H 'CCRT-Subject: C=DE, O=Daimler AG, OU=MBIIS-CERT, CN=0DF4477' --resolve nginx.local:80:172.17.0.3
{
"environment": "dev"
}
Please note that nginx-ingress > v1.9.0 and and k8s version > v1.10.0 are needed for this demo.
If you haven't already done it, follow section 6 of this guide to build, ship, and run the Nginx Plus Ingress docker image.
kubectl apply -f nginx-plus-ingress/k8s/ingress-mtls/webapp.yaml
kubectl apply -f nginx-plus-ingress/k8s/ingress-mtls/ingress-mtls-secret.yaml
kubectl apply -f nginx-plus-ingress/k8s/ingress-mtls/ingress-mtls.yaml
kubectl apply -f nginx-plus-ingress/k8s/ingress-mtls/tls-secret.yaml
kubectl apply -f nginx-plus-ingress/k8s/ingress-mtls/virtual-server.yam
Get ingress worker node
kubectl get pods -lapp=nginx-ingress -n nginx-ingress -o wide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
nginx-ingress-6cb66fc868-q6x5k 1/1 Running 0 10m 192.168.142.142 worker-97c3e840.d5540.eadem.com <none> <none>
Get worker node IP
qbo get nodes
cdc491667798 worker-7224a7a4.d5540.eadem.com 172.17.0.5 eadem/node:v1.18.1 running
412c34fbe2a7 worker-97c3e840.d5540.eadem.com 172.17.0.4 eadem/node:v1.18.1 running
e2186bca311a master.d5540.eadem.com 172.17.0.3 eadem/node:v1.18.1 running
Test without client certs
curl --insecure --resolve webapp.example.com:443:172.17.0.4 https://webapp.example.com:443/
<html>
<head><title>400 No required SSL certificate was sent</title></head>
<body>
<center><h1>400 Bad Request</h1></center>
<center>No required SSL certificate was sent</center>
<hr><center>nginx/1.19.0</center>
</body>
</html>
Test using client certs
curl --insecure --resolve webapp.example.com:443:172.17.0.4 https://webapp.example.com:443/ --cert nginx-plus-ingress/k8s/ingress-mtls/client-cert.pem --key nginx-plus-ingress/k8s/ingress-mtls/client-key.pem
Server address: 192.168.2.206:8080
Server name: webapp-d55c6448-92twn
Date: 21/Oct/2020:12:45:52 +0000
URI: /
Request ID: 64acd047e4daea9bc2ea26511f4aceba
Install Helm
curl https://raw.githubusercontent.com/helm/helm/master/scripts/get-helm-3 > get_helm.sh
chmod 700 get_helm.sh
./get_helm.sh
helm repo add stable https://charts.helm.sh/stable --force-update
helm repo update
Create namespace monitoring
kubectl create namespace monitoring
Install Prometheus Operator via Helm
helm install prometheus-operator --namespace monitoring stable/prometheus-operator --set prometheus.prometheusSpec.serviceMonitorSelectorNilUsesHelmValues=false --set grafana.sidecar.dashboards.enabled=true
watch kubectl --namespace default get pods --namespace=monitoring
When you see all components up, CTRL-C out of it.
Apply Prometheus and Grafana configs
kubectl apply -f nginx-plus-ingress/k8s/monitoring/
Get worker node name
kubectl get pods -n nginx-ingress -o wide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
nginx-ingress-6b447c88b7-brk7r 1/1 Running 0 20m 192.168.57.4 worker-1b96d796.d5540.eadem.com <none> <none>
Get worker IP Adresss
qbo get nodes
7266b3a4bd78 worker-2a950333.d5540.eadem.com 172.17.0.6 eadem/node:v1.18.1 running
d0a187d31f30 worker-209e83a9.d5540.eadem.com 172.17.0.5 eadem/node:v1.18.1 running
98df45ed1d07 worker-1b96d796.d5540.eadem.com 172.17.0.4 eadem/node:v1.18.1 running
e147cbf0cda2 master.d5540.eadem.com 172.17.0.3 eadem/node:v1.18.1 running
Add hosts entries
Add to /etc/hosts/
172.17.0.4 grafana.example.com
172.17.0.4 prometheus.example.com
172.17.0.4 alertmanager.example.com
Access Prometheus UI
Open http://prometheus.example.com/graph using your web browser
Get grafana password
kubectl get secret -n monitoring prometheus-operator-grafana -o jsonpath="{.data.admin-password}" | base64 --decode ; echo
Access Grafana UI
Open http://grafana.example.com/login using your web browser
and user admin and the password obtained in the previous section
