Generating and using ssl client certificates for use in an nginx sidecar image

build-complete.txt

[user@localhost certs]$ oc get builds
NAME                              TYPE     FROM          STATUS     STARTED             DURATION
nodejs-mongo-persistent-1         Source   Git@e59fe75   Complete   About an hour ago   2m37s
simple-nginx-ssl-reverseproxy-1   Source   Git@552932f   Complete   16 minutes ago      47s

create-cert-secret.sh

[user@localhost certs]$ mkdir nginx-certs
[user@localhost certs]$ cp server.crt server.key ca.crt nginx-certs/
[user@localhost certs]$ oc create secret generic nginx-certs --from-file=nginx-certs/
secret/nginx-certs created

create-new-nginx-build.sh

[user@localhost certs]$ oc new-build nginx:1.12~https://github.com/welshstew/simple-nginx-ssl-reverseproxy.git
--> Found image e6192d2 (3 weeks old) in image stream "openshift/nginx" under tag "1.12" for "nginx:1.12"

    Nginx 1.12 
    ---------- 
    Nginx is a web server and a reverse proxy server for HTTP, SMTP, POP3 and IMAP protocols, with a strong focus on high concurrency, performance and low memory usage. The container image provides a containerized packaging of the nginx 1.12 daemon. The image can be used as a base image for other applications based on nginx 1.12 web server. Nginx server image can be extended using source-to-image tool.
...
(abbreviated)

create-simple-node-app.sh

[user@localhost ~]$ oc new-project nginx-sidecar
Now using project "nginx-sidecar" on server "https://api.crc.testing:6443".
...
[user@localhost ~]$ oc new-app --template=nodejs-mongo-persistent
--> Deploying template "openshift/nodejs-mongo-persistent" to project nginx-sidecar

     Node.js + MongoDB
     ---------
     An example Node.js application with a MongoDB database. For more information about using this template, including OpenShift considerations, see https://github.com/sclorg/nodejs-ex/blob/master/README.md.

     The following service(s) have been created in your project: nodejs-mongo-persistent, mongodb.
...
(abbreviated)

generate-certificates.sh

# Generate the Root CA certificate
openssl genrsa -aes256 -passout pass:password -out ca.pass.key 4096
openssl rsa -passin pass:password -in ca.pass.key -out ca.key
openssl req -new -x509 -days 365 -key ca.key -out ca.crt
#rm ca.pass.key

# Create the Server Key, CSR, and Certificate - This will be used by the NGINX sidecar container (the Server)
openssl genrsa -aes256 -passout pass:password -out server.pass.key 4096
openssl rsa -passin pass:password -in server.pass.key -out server.key
openssl req -new -key server.key -out server.csr

# We're self signing our own server cert here.  This is a no-no in production.
openssl x509 -req -days 365 -in server.csr -CA ca.crt -CAkey ca.key -set_serial 01 -out server.crt

# Create the Client Key and CSR - All of this is required for the client (the web browser client)
openssl genrsa -aes256 -passout pass:password -out client.pass.key 4096
openssl rsa -passin pass:password -in client.pass.key -out client.key
openssl req -new -key client.key -out client.csr

# Sign the client certificate with our CA cert.  Unlike signing our own server cert, this is what we want to do.
openssl x509 -req -days 365 -in client.csr -CA ca.crt -CAkey ca.key -set_serial 01 -out client.crt

# Bundle the private key & cert for end-user client use
cat client.key client.crt ca.crt > client.full.pem

# Bundle client key into a PFX file - this is what will be imported to the browser to use as a client certifcate
openssl pkcs12 -export -out client.full.pfx -inkey client.key -in client.full.pem -certfile ca.crt

generate-certs-input-example.sh

[user@localhost certs]$ openssl req -new -x509 -days 365 -key ca.key -out ca.crt
You are about to be asked to enter information that will be incorporated
into your certificate request.
What you are about to enter is what is called a Distinguished Name or a DN.
There are quite a few fields but you can leave some blank
For some fields there will be a default value,
If you enter '.', the field will be left blank.
-----
Country Name (2 letter code) [XX]:UK
State or Province Name (full name) []:AA
Locality Name (eg, city) [Default City]:AA
Organization Name (eg, company) [Default Company Ltd]:AA
Organizational Unit Name (eg, section) []:AA
Common Name (eg, your name or your server's hostname) []:Root  
Email Address []:someone@codergists.com

nginx-ssl-snippet.conf

    ssl on;
    ssl_certificate      /etc/nginx/certs/server.crt;
    ssl_certificate_key  /etc/nginx/certs/server.key;
    ssl_client_certificate /etc/nginx/certs/ca.crt;
    ssl_verify_client optional;

    server {
      listen 8443 ssl;   

nginx.conf

# For more information on configuration, see:
#   * Official English Documentation: http://nginx.org/en/docs/
#   * Official Russian Documentation: http://nginx.org/ru/docs/


worker_processes auto;
error_log /var/opt/rh/rh-nginx112/log/nginx/error.log;
pid /var/opt/rh/rh-nginx112/run/nginx/nginx.pid;

# Load dynamic modules. See /opt/rh/rh-nginx112/root/usr/share/doc/README.dynamic.
include /opt/rh/rh-nginx112/root/usr/share/nginx/modules/*.conf;

events {
    worker_connections  1024;
}

http {
    log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
                      '$status $body_bytes_sent "$http_referer" '
                      '"$http_user_agent" "$http_x_forwarded_for"';

    access_log  /var/opt/rh/rh-nginx112/log/nginx/access.log  main;

    sendfile        on;
    tcp_nopush      on;
    tcp_nodelay     on;
    keepalive_timeout  65;
    types_hash_max_size 2048;

    include       /etc/opt/rh/rh-nginx112/nginx/mime.types;
    default_type  application/octet-stream;

    # Load modular configuration files from the /etc/nginx/conf.d directory.
    # See http://nginx.org/en/docs/ngx_core_module.html#include
    # for more information.
    include /opt/app-root/etc/nginx.d/*.conf;

    ssl on;
    ssl_certificate      /etc/nginx/certs/server.crt;
    ssl_certificate_key  /etc/nginx/certs/server.key;
    ssl_client_certificate /etc/nginx/certs/ca.crt;
    ssl_verify_client optional;

    server {
      listen 8443 ssl;      

      server_name _;

      location / {
        proxy_pass http://localhost:8080/;
        proxy_set_header X-Real-IP $remote_addr;
      }
    }
}

nodejs-mongo-persistent-dc.yaml

apiVersion: apps.openshift.io/v1
kind: DeploymentConfig
metadata:
  annotations:
    description: Defines how to deploy the application server
    openshift.io/generated-by: OpenShiftNewApp
    template.alpha.openshift.io/wait-for-ready: "true"
  creationTimestamp: null
  generation: 1
  labels:
    app: nodejs-mongo-persistent
    template: nodejs-mongo-persistent
  name: nodejs-mongo-persistent
  selfLink: /apis/apps.openshift.io/v1/namespaces/nginx-sidecar/deploymentconfigs/nodejs-mongo-persistent
spec:
  replicas: 1
  revisionHistoryLimit: 10
  selector:
    name: nodejs-mongo-persistent
  strategy:
    activeDeadlineSeconds: 21600
    recreateParams:
      timeoutSeconds: 600
    resources: {}
    type: Recreate
  template:
    metadata:
      annotations:
        openshift.io/generated-by: OpenShiftNewApp
      creationTimestamp: null
      labels:
        app: nodejs-mongo-persistent
        name: nodejs-mongo-persistent
      name: nodejs-mongo-persistent
    spec:
      containers:
      - image: image-registry.openshift-image-registry.svc:5000/nginx-sidecar/simple-nginx-ssl-reverseproxy:latest
        imagePullPolicy: IfNotPresent
        name: nginx-sidecar
        ports:
        - containerPort: 8443
          protocol: TCP
        resources: {}
        terminationMessagePath: /dev/termination-log
        terminationMessagePolicy: File
        volumeMounts:
        - mountPath: /etc/nginx/certs
          name: nginx-certs
      - env:
        - name: DATABASE_SERVICE_NAME
          value: mongodb
        - name: MONGODB_USER
          valueFrom:
            secretKeyRef:
              key: database-user
              name: nodejs-mongo-persistent
        - name: MONGODB_PASSWORD
          valueFrom:
            secretKeyRef:
              key: database-password
              name: nodejs-mongo-persistent
        - name: MONGODB_DATABASE
          value: sampledb
        - name: MONGODB_ADMIN_PASSWORD
          valueFrom:
            secretKeyRef:
              key: database-admin-password
              name: nodejs-mongo-persistent
        image: image-registry.openshift-image-registry.svc:5000/nginx-sidecar/nodejs-mongo-persistent@sha256:036c0cd556dca427f7e723db4b14bb18452214601570a1339ec057bb60b779b5
        imagePullPolicy: IfNotPresent
        livenessProbe:
          failureThreshold: 3
          httpGet:
            path: /
            port: 8080
            scheme: HTTP
          initialDelaySeconds: 30
          periodSeconds: 10
          successThreshold: 1
          timeoutSeconds: 3
        name: nodejs-mongo-persistent
        ports:
        - containerPort: 8080
          protocol: TCP
        readinessProbe:
          failureThreshold: 3
          httpGet:
            path: /
            port: 8080
            scheme: HTTP
          initialDelaySeconds: 3
          periodSeconds: 10
          successThreshold: 1
          timeoutSeconds: 3
        resources:
          limits:
            memory: 512Mi
        terminationMessagePath: /dev/termination-log
        terminationMessagePolicy: File
      dnsPolicy: ClusterFirst
      restartPolicy: Always
      schedulerName: default-scheduler
      securityContext: {}
      terminationGracePeriodSeconds: 30
      volumes:
      - name: nginx-certs
        secret:
          defaultMode: 420
          secretName: nginx-certs
  test: false
  triggers:
  - imageChangeParams:
      automatic: true
      containerNames:
      - nodejs-mongo-persistent
      from:
        kind: ImageStreamTag
        name: nodejs-mongo-persistent:latest
        namespace: nginx-sidecar
    type: ImageChange
  - type: ConfigChange

nodejs-mongo-persistent-route.yaml

apiVersion: route.openshift.io/v1
kind: Route
metadata:
  annotations:
    openshift.io/generated-by: OpenShiftNewApp
    openshift.io/host.generated: "true"
  creationTimestamp: "2019-09-19T10:41:26Z"
  labels:
    app: nodejs-mongo-persistent
    template: nodejs-mongo-persistent
  name: nodejs-mongo-persistent
  namespace: nginx-sidecar
  resourceVersion: "254150"
  selfLink: /apis/route.openshift.io/v1/namespaces/nginx-sidecar/routes/nodejs-mongo-persistent
  uid: 07fc9110-daca-11e9-af34-0a580a800098
spec:
  host: nodejs-mongo-persistent-nginx-sidecar.apps-crc.testing
  subdomain: ""
  tls:
    termination: passthrough
  to:
    kind: Service
    name: nodejs-mongo-persistent
    weight: 100
  wildcardPolicy: None

nodejs-mongo-persistent-svc.yaml

apiVersion: v1
kind: Service
metadata:
  annotations:
    description: Exposes and load balances the application pods
    openshift.io/generated-by: OpenShiftNewApp
    service.alpha.openshift.io/dependencies: '[{"name": "mongodb", "kind": "Service"}]'
  creationTimestamp: "2019-09-19T10:41:26Z"
  labels:
    app: nodejs-mongo-persistent
    template: nodejs-mongo-persistent
  name: nodejs-mongo-persistent
  namespace: nginx-sidecar
  resourceVersion: "253714"
  selfLink: /api/v1/namespaces/nginx-sidecar/services/nodejs-mongo-persistent
  uid: 07f90f53-daca-11e9-ba93-52fdfc072182
spec:
  clusterIP: 172.30.51.37
  ports:
  - name: web
    port: 8443
    protocol: TCP
    targetPort: 8443
  selector:
    name: nodejs-mongo-persistent
  sessionAffinity: None
  type: ClusterIP
status:
  loadBalancer: {}