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NGINX Configuration
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Introduction
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< a href = "../../../user-guide/basic-usage/" title = "Basic usage" class = "md-nav__link" >
Basic usage
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< a href = "../../../user-guide/nginx-configuration/annotations/" title = "Annotations" class = "md-nav__link" >
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Annotations
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< a href = "../../../user-guide/nginx-configuration/configmap/" title = "ConfigMap" class = "md-nav__link" >
ConfigMap
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< a href = "../../../user-guide/nginx-configuration/custom-template/" title = "Custom NGINX template" class = "md-nav__link" >
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Custom NGINX template
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< a href = "../../../user-guide/nginx-configuration/log-format/" title = "Log format" class = "md-nav__link" >
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Log format
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< a href = "../../../user-guide/cli-arguments/" title = "Command line arguments" class = "md-nav__link" >
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Command line arguments
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< a href = "../../../user-guide/custom-errors/" title = "Custom errors" class = "md-nav__link" >
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Custom errors
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< li class = "md-nav__item" >
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< a href = "../../../user-guide/default-backend/" title = "Default backend" class = "md-nav__link" >
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Default backend
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< li class = "md-nav__item" >
< a href = "../../../user-guide/exposing-tcp-udp-services/" title = "Exposing TCP and UDP services" class = "md-nav__link" >
Exposing TCP and UDP services
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< a href = "../../../user-guide/fcgi-services/" title = "Exposing FCGI services" class = "md-nav__link" >
Exposing FCGI services
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< a href = "../../../user-guide/ingress-path-matching/" title = "Regular expressions in paths" class = "md-nav__link" >
Regular expressions in paths
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< a href = "../../../user-guide/external-articles/" title = "External Articles" class = "md-nav__link" >
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External Articles
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< a href = "../../../user-guide/miscellaneous/" title = "Miscellaneous" class = "md-nav__link" >
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Miscellaneous
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< a href = "../../../user-guide/monitoring/" title = "Prometheus and Grafana installation" class = "md-nav__link" >
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Prometheus and Grafana installation
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< li class = "md-nav__item" >
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< a href = "../../../user-guide/multiple-ingress/" title = "Multiple Ingress controllers" class = "md-nav__link" >
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Multiple Ingress controllers
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< a href = "../../../user-guide/tls/" title = "TLS/HTTPS" class = "md-nav__link" >
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TLS/HTTPS
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Third party addons
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Third party addons
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< a href = "../../../user-guide/third-party-addons/modsecurity/" title = "ModSecurity Web Application Firewall" class = "md-nav__link" >
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ModSecurity Web Application Firewall
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< a href = "../../../user-guide/third-party-addons/opentracing/" title = "OpenTracing" class = "md-nav__link" >
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OpenTracing
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Examples
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< nav class = "md-nav" aria-label = "Examples" data-md-level = "1" >
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< span class = "md-nav__icon md-icon" >
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Examples
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< a href = "../../" title = "Introduction" class = "md-nav__link" >
Introduction
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< a href = "../../PREREQUISITES/" title = "Prerequisites" class = "md-nav__link" >
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Prerequisites
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< a href = "../../affinity/cookie/" title = "Sticky Sessions" class = "md-nav__link" >
Sticky Sessions
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< label class = "md-nav__link" for = "nav-4-4" >
Auth
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< span class = "md-nav__icon md-icon" >
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Auth
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< a href = "../../auth/basic/" title = "Basic Authentication" class = "md-nav__link" >
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Basic Authentication
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< a href = "../../auth/client-certs/" title = "Client Certificate Authentication" class = "md-nav__link" >
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Client Certificate Authentication
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< a href = "../../auth/external-auth/" title = "External Basic Authentication" class = "md-nav__link" >
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External Basic Authentication
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< a href = "../../auth/oauth-external-auth/" title = "External OAUTH Authentication" class = "md-nav__link" >
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External OAUTH Authentication
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Customization
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< label class = "md-nav__title" for = "nav-4-5" >
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< span class = "md-nav__icon md-icon" >
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Customization
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< a href = "../configuration-snippets/" title = "Configuration Snippets" class = "md-nav__link" >
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Configuration Snippets
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< a href = "../custom-configuration/" title = "Custom Configuration" class = "md-nav__link" >
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Custom Configuration
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< label class = "md-nav__link md-nav__link--active" for = "__toc" >
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Custom Errors
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< / label >
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< a href = "./" title = "Custom Errors" class = "md-nav__link md-nav__link--active" >
Custom Errors
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< nav class = "md-nav md-nav--secondary" aria-label = "Table of contents" >
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< label class = "md-nav__title" for = "__toc" >
< span class = "md-nav__icon md-icon" >
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Table of contents
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< ul class = "md-nav__list" data-md-scrollfix >
< li class = "md-nav__item" >
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< a href = "#customized-default-backend" class = "md-nav__link" >
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Customized default backend
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< li class = "md-nav__item" >
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< a href = "#ingress-controller-configuration" class = "md-nav__link" >
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Ingress controller configuration
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< li class = "md-nav__item" >
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< a href = "#testing-error-pages" class = "md-nav__link" >
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Testing error pages
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< a href = "../custom-headers/" title = "Custom Headers" class = "md-nav__link" >
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Custom Headers
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< a href = "../external-auth-headers/" title = "External authentication" class = "md-nav__link" >
External authentication
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< li class = "md-nav__item" >
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< a href = "../ssl-dh-param/" title = "Custom DH parameters for perfect forward secrecy" class = "md-nav__link" >
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Custom DH parameters for perfect forward secrecy
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< a href = "../sysctl/" title = "Sysctl tuning" class = "md-nav__link" >
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Sysctl tuning
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< a href = "../../docker-registry/" title = "Docker registry" class = "md-nav__link" >
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Docker registry
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< li class = "md-nav__item" >
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< a href = "../../grpc/" title = "gRPC" class = "md-nav__link" >
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gRPC
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< li class = "md-nav__item" >
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< a href = "../../multi-tls/" title = "Multi TLS certificate termination" class = "md-nav__link" >
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Multi TLS certificate termination
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< a href = "../../rewrite/" title = "Rewrite" class = "md-nav__link" >
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Rewrite
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< li class = "md-nav__item" >
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< a href = "../../static-ip/" title = "Static IPs" class = "md-nav__link" >
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Static IPs
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< li class = "md-nav__item" >
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< a href = "../../tls-termination/" title = "TLS termination" class = "md-nav__link" >
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TLS termination
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< li class = "md-nav__item" >
< a href = "../../psp/" title = "Pod Security Policy (PSP)" class = "md-nav__link" >
Pod Security Policy (PSP)
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< div class = "md-sidebar md-sidebar--secondary" data-md-component = "toc" >
< div class = "md-sidebar__scrollwrap" >
< div class = "md-sidebar__inner" >
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< nav class = "md-nav md-nav--secondary" aria-label = "Table of contents" >
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< label class = "md-nav__title" for = "__toc" >
< span class = "md-nav__icon md-icon" >
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Table of contents
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< ul class = "md-nav__list" data-md-scrollfix >
< li class = "md-nav__item" >
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< a href = "#customized-default-backend" class = "md-nav__link" >
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Customized default backend
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< li class = "md-nav__item" >
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< a href = "#ingress-controller-configuration" class = "md-nav__link" >
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Ingress controller configuration
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< li class = "md-nav__item" >
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< a href = "#testing-error-pages" class = "md-nav__link" >
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Testing error pages
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< div class = "md-content" >
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< h1 id = "custom-errors" > Custom Errors< a class = "headerlink" href = "#custom-errors" title = "Permanent link" > ¶< / a > < / h1 >
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< p > This example demonstrates how to use a custom backend to render custom error pages.< / p >
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< h2 id = "customized-default-backend" > Customized default backend< a class = "headerlink" href = "#customized-default-backend" title = "Permanent link" > ¶< / a > < / h2 >
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< p > First, create the custom < code > default-backend< / code > . It will be used by the Ingress controller later on.< / p >
< div class = "highlight" > < pre > < span > < / span > < code > $ kubectl create -f custom-default-backend.yaml
service " nginx-errors" created
deployment.apps " nginx-errors" created
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< / code > < / pre > < / div >
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< p > This should have created a Deployment and a Service with the name < code > nginx-errors< / code > .< / p >
< div class = "highlight" > < pre > < span > < / span > < code > $ kubectl get deploy,svc
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NAME DESIRED CURRENT READY AGE
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deployment.apps/nginx-errors 1 1 1 10s
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NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
service/nginx-errors ClusterIP 10.0.0.12 < none> 80/TCP 10s
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< / code > < / pre > < / div >
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< h2 id = "ingress-controller-configuration" > Ingress controller configuration< a class = "headerlink" href = "#ingress-controller-configuration" title = "Permanent link" > ¶< / a > < / h2 >
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< p > If you do not already have an instance of the NGINX Ingress controller running, deploy it according to the
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< a href = "../../../deploy/" > deployment guide< / a > , then follow these steps:< / p >
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< ol >
< li >
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< p > Edit the < code > nginx-ingress-controller< / code > Deployment and set the value of the < code > --default-backend-service< / code > flag to the name of the
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newly created error backend.< / p >
< / li >
< li >
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< p > Edit the < code > nginx-configuration< / code > ConfigMap and create the key < code > custom-http-errors< / code > with a value of < code > 404,503< / code > .< / p >
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< / li >
< li >
< p > Take note of the IP address assigned to the NGINX Ingress controller Service.
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< div class = "highlight" > < pre > < span > < / span > < code > $ kubectl get svc ingress-nginx
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
ingress-nginx ClusterIP 10.0.0.13 < none> 80/TCP,443/TCP 10m
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< / code > < / pre > < / div > < / p >
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< / li >
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< p class = "admonition-title" > Note< / p >
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< p > The < code > ingress-nginx< / code > Service is of type < code > ClusterIP< / code > in this example. This may vary depending on your environment.
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Make sure you can use the Service to reach NGINX before proceeding with the rest of this example.< / p >
< / div >
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< h2 id = "testing-error-pages" > Testing error pages< a class = "headerlink" href = "#testing-error-pages" title = "Permanent link" > ¶< / a > < / h2 >
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< p > Let us send a couple of HTTP requests using cURL and validate everything is working as expected.< / p >
< p > A request to the default backend returns a 404 error with a custom message:< / p >
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< div class = "highlight" > < pre > < span > < / span > < code > $ curl -D- http://10.0.0.13/
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HTTP/1.1 404 Not Found
Server: nginx/1.13.12
Date: Tue, 12 Jun 2018 19:11:24 GMT
Content-Type: */*
Transfer-Encoding: chunked
Connection: keep-alive
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< span> The page you' re looking for could not be found.< /span>
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< / code > < / pre > < / div >
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< p > A request with a custom < code > Accept< / code > header returns the corresponding document type (JSON):< / p >
< div class = "highlight" > < pre > < span > < / span > < code > $ curl -D- -H ' Accept: application/json' http://10.0.0.13/
HTTP/1.1 404 Not Found
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Server: nginx/1.13.12
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Date: Tue, 12 Jun 2018 19:12:36 GMT
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Content-Type: application/json
Transfer-Encoding: chunked
Connection: keep-alive
Vary: Accept-Encoding
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{ " message" : " The page you' re looking for could not be found" }
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< / code > < / pre > < / div >
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< p > To go further with this example, feel free to deploy your own applications and Ingress objects, and validate that the
responses are still in the correct format when a backend returns 503 (eg. if you scale a Deployment down to 0 replica).< / p >
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