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Exposing FCGI services
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Exposing FCGI services
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Exposing FCGI services
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Example Objects to Expose a FastCGI Pod
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FastCGI Ingress Annotations
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The nginx.ingress.kubernetes.io/fastcgi-index Annotation
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The nginx.ingress.kubernetes.io/fastcgi-params-configmap Annotation
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Example Objects to Expose a FastCGI Pod
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The nginx.ingress.kubernetes.io/fastcgi-index Annotation
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The nginx.ingress.kubernetes.io/fastcgi-params-configmap Annotation
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< h1 id = "exposing-fastcgi-servers" > Exposing FastCGI Servers< a class = "headerlink" href = "#exposing-fastcgi-servers" title = "Permanent link" > ¶< / a > < / h1 >
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< blockquote >
< p > < strong > FastCGI< / strong > is a < a href = "https://en.wikipedia.org/wiki/Binary_protocol" title = "Binary protocol" > binary protocol< / a > for interfacing interactive programs with a < a href = "https://en.wikipedia.org/wiki/Web_server" title = "Web server" > web server< / a > . [...] (It's) aim is to reduce the overhead related to interfacing between web server and CGI programs, allowing a server to handle more web page requests per unit of time.< / p >
< p > — Wikipedia< / p >
< / blockquote >
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< p > The < em > ingress-nginx< / em > ingress controller can be used to directly expose < a href = "https://en.wikipedia.org/wiki/FastCGI" > FastCGI< / a > servers. Enabling FastCGI in your Ingress only requires setting the < em > backend-protocol< / em > annotation to < code > FCGI< / code > , and with a couple more annotations you can customize the way < em > ingress-nginx< / em > handles the communication with your FastCGI < em > server< / em > .< / p >
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< h2 id = "example-objects-to-expose-a-fastcgi-pod" > Example Objects to Expose a FastCGI Pod< a class = "headerlink" href = "#example-objects-to-expose-a-fastcgi-pod" title = "Permanent link" > ¶< / a > < / h2 >
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< p > The < em > Pod< / em > example object below exposes port < code > 9000< / code > , which is the conventional FastCGI port.< / p >
< div class = "highlight" > < pre > < span > < / span > < code > < span class = "nt" > apiVersion< / span > < span class = "p" > :< / span > < span class = "l l-Scalar l-Scalar-Plain" > v1< / span >
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< span class = "nt" > kind< / span > < span class = "p" > :< / span > < span class = "l l-Scalar l-Scalar-Plain" > Pod< / span >
< span class = "nt" > metadata< / span > < span class = "p" > :< / span >
< span class = "nt" > name< / span > < span class = "p" > :< / span > < span class = "l l-Scalar l-Scalar-Plain" > example-app< / span >
< span class = "nt" > labels< / span > < span class = "p" > :< / span >
< span class = "nt" > app< / span > < span class = "p" > :< / span > < span class = "l l-Scalar l-Scalar-Plain" > example-app< / span >
< span class = "nt" > spec< / span > < span class = "p" > :< / span >
< span class = "nt" > containers< / span > < span class = "p" > :< / span >
< span class = "p p-Indicator" > -< / span > < span class = "nt" > name< / span > < span class = "p" > :< / span > < span class = "l l-Scalar l-Scalar-Plain" > example-app< / span >
< span class = "nt" > image< / span > < span class = "p" > :< / span > < span class = "l l-Scalar l-Scalar-Plain" > example-app:1.0< / span >
< span class = "nt" > ports< / span > < span class = "p" > :< / span >
< span class = "p p-Indicator" > -< / span > < span class = "nt" > containerPort< / span > < span class = "p" > :< / span > < span class = "l l-Scalar l-Scalar-Plain" > 9000< / span >
< span class = "nt" > name< / span > < span class = "p" > :< / span > < span class = "l l-Scalar l-Scalar-Plain" > fastcgi< / span >
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< / code > < / pre > < / div >
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< p > The < em > Service< / em > object example below matches port < code > 9000< / code > from the < em > Pod< / em > object above.< / p >
< div class = "highlight" > < pre > < span > < / span > < code > < span class = "nt" > apiVersion< / span > < span class = "p" > :< / span > < span class = "l l-Scalar l-Scalar-Plain" > v1< / span >
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< span class = "nt" > kind< / span > < span class = "p" > :< / span > < span class = "l l-Scalar l-Scalar-Plain" > Service< / span >
< span class = "nt" > metadata< / span > < span class = "p" > :< / span >
< span class = "nt" > name< / span > < span class = "p" > :< / span > < span class = "l l-Scalar l-Scalar-Plain" > example-service< / span >
< span class = "nt" > spec< / span > < span class = "p" > :< / span >
< span class = "nt" > selector< / span > < span class = "p" > :< / span >
< span class = "nt" > app< / span > < span class = "p" > :< / span > < span class = "l l-Scalar l-Scalar-Plain" > example-app< / span >
< span class = "nt" > ports< / span > < span class = "p" > :< / span >
< span class = "p p-Indicator" > -< / span > < span class = "nt" > port< / span > < span class = "p" > :< / span > < span class = "l l-Scalar l-Scalar-Plain" > 9000< / span >
< span class = "nt" > targetPort< / span > < span class = "p" > :< / span > < span class = "l l-Scalar l-Scalar-Plain" > 9000< / span >
< span class = "nt" > name< / span > < span class = "p" > :< / span > < span class = "l l-Scalar l-Scalar-Plain" > fastcgi< / span >
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< / code > < / pre > < / div >
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< p > And the < em > Ingress< / em > and < em > ConfigMap< / em > objects below demonstrates the supported < em > FastCGI< / em > specific annotations (NGINX actually has 50 FastCGI directives, all of which have not been exposed in the ingress yet), and matches the service < code > example-service< / code > , and the port named < code > fastcgi< / code > from above. The < em > ConfigMap< / em > < strong > must< / strong > be created first for the < em > Ingress Controller< / em > to be able to find it when the < em > Ingress< / em > object is created, otherwise you will need to restart the < em > Ingress Controller< / em > pods.< / p >
< div class = "highlight" > < pre > < span > < / span > < code > < span class = "c1" > # The ConfigMap MUST be created first for the ingress controller to be able to< / span >
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< span class = "c1" > # find it when the Ingress object is created.< / span >
< span class = "nt" > apiVersion< / span > < span class = "p" > :< / span > < span class = "l l-Scalar l-Scalar-Plain" > v1< / span >
< span class = "nt" > kind< / span > < span class = "p" > :< / span > < span class = "l l-Scalar l-Scalar-Plain" > ConfigMap< / span >
< span class = "nt" > metadata< / span > < span class = "p" > :< / span >
< span class = "nt" > name< / span > < span class = "p" > :< / span > < span class = "l l-Scalar l-Scalar-Plain" > example-cm< / span >
< span class = "nt" > data< / span > < span class = "p" > :< / span >
< span class = "nt" > SCRIPT_FILENAME< / span > < span class = "p" > :< / span > < span class = "s" > " /example/index.php" < / span >
< span class = "nn" > ---< / span >
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< span class = "nt" > apiVersion< / span > < span class = "p" > :< / span > < span class = "l l-Scalar l-Scalar-Plain" > networking.k8s.io/v1beta1< / span >
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< span class = "nt" > kind< / span > < span class = "p" > :< / span > < span class = "l l-Scalar l-Scalar-Plain" > Ingress< / span >
< span class = "nt" > metadata< / span > < span class = "p" > :< / span >
< span class = "nt" > annotations< / span > < span class = "p" > :< / span >
< span class = "nt" > kubernetes.io/ingress.class< / span > < span class = "p" > :< / span > < span class = "s" > " nginx" < / span >
< span class = "nt" > nginx.ingress.kubernetes.io/backend-protocol< / span > < span class = "p" > :< / span > < span class = "s" > " FCGI" < / span >
< span class = "nt" > nginx.ingress.kubernetes.io/fastcgi-index< / span > < span class = "p" > :< / span > < span class = "s" > " index.php" < / span >
< span class = "nt" > nginx.ingress.kubernetes.io/fastcgi-params-configmap< / span > < span class = "p" > :< / span > < span class = "s" > " example-cm" < / span >
< span class = "nt" > name< / span > < span class = "p" > :< / span > < span class = "l l-Scalar l-Scalar-Plain" > example-app< / span >
< span class = "nt" > spec< / span > < span class = "p" > :< / span >
< span class = "nt" > rules< / span > < span class = "p" > :< / span >
< span class = "p p-Indicator" > -< / span > < span class = "nt" > host< / span > < span class = "p" > :< / span > < span class = "l l-Scalar l-Scalar-Plain" > app.example.com< / span >
< span class = "nt" > http< / span > < span class = "p" > :< / span >
< span class = "nt" > paths< / span > < span class = "p" > :< / span >
< span class = "p p-Indicator" > -< / span > < span class = "nt" > backend< / span > < span class = "p" > :< / span >
< span class = "nt" > serviceName< / span > < span class = "p" > :< / span > < span class = "l l-Scalar l-Scalar-Plain" > example-service< / span >
< span class = "nt" > servicePort< / span > < span class = "p" > :< / span > < span class = "l l-Scalar l-Scalar-Plain" > fastcgi< / span >
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< / code > < / pre > < / div >
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< h2 id = "fastcgi-ingress-annotations" > FastCGI Ingress Annotations< a class = "headerlink" href = "#fastcgi-ingress-annotations" title = "Permanent link" > ¶< / a > < / h2 >
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< p > To enable FastCGI, the < code > nginx.ingress.kubernetes.io/backend-protocol< / code > annotation needs to be set to < code > FCGI< / code > , which overrides the default < code > HTTP< / code > value.< / p >
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< blockquote >
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< p > < code > nginx.ingress.kubernetes.io/backend-protocol: "FCGI"< / code > < / p >
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< / blockquote >
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< p > < strong > This enables the < em > FastCGI< / em > mode for all paths defined in the < em > Ingress< / em > object< / strong > < / p >
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< h3 id = "the-nginxingresskubernetesiofastcgi-index-annotation" > The < code > nginx.ingress.kubernetes.io/fastcgi-index< / code > Annotation< a class = "headerlink" href = "#the-nginxingresskubernetesiofastcgi-index-annotation" title = "Permanent link" > ¶< / a > < / h3 >
< p > To specify an index file, the < code > fastcgi-index< / code > annotation value can optionally be set. In the example below, the value is set to < code > index.php< / code > . This annotation corresponds to < a href = "http://nginx.org/en/docs/http/ngx_http_fastcgi_module.html#fastcgi_index" > the < em > NGINX< / em > < code > fastcgi_index< / code > directive< / a > .< / p >
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< blockquote >
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< p > < code > nginx.ingress.kubernetes.io/fastcgi-index: "index.php"< / code > < / p >
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< / blockquote >
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< h3 id = "the-nginxingresskubernetesiofastcgi-params-configmap-annotation" > The < code > nginx.ingress.kubernetes.io/fastcgi-params-configmap< / code > Annotation< a class = "headerlink" href = "#the-nginxingresskubernetesiofastcgi-params-configmap-annotation" title = "Permanent link" > ¶< / a > < / h3 >
< p > To specify < a href = "http://nginx.org/en/docs/http/ngx_http_fastcgi_module.html#fastcgi_param" > < em > NGINX< / em > < code > fastcgi_param< / code > directives< / a > , the < code > fastcgi-params-configmap< / code > annotation is used, which in turn must lead to a < em > ConfigMap< / em > object containing the < em > NGINX< / em > < code > fastcgi_param< / code > directives as key/values.< / p >
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< blockquote >
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< p > < code > nginx.ingress.kubernetes.io/fastcgi-params-configmap: "example-configmap"< / code > < / p >
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< / blockquote >
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< p > And the < em > ConfigMap< / em > object to specify the < code > SCRIPT_FILENAME< / code > and < code > HTTP_PROXY< / code > < em > NGINX's< / em > < code > fastcgi_param< / code > directives will look like the following:< / p >
< p > < div class = "highlight" > < pre > < span > < / span > < code > < span class = "nt" > apiVersion< / span > < span class = "p" > :< / span > < span class = "l l-Scalar l-Scalar-Plain" > v1< / span >
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< span class = "nt" > kind< / span > < span class = "p" > :< / span > < span class = "l l-Scalar l-Scalar-Plain" > ConfigMap< / span >
< span class = "nt" > metadata< / span > < span class = "p" > :< / span >
< span class = "nt" > name< / span > < span class = "p" > :< / span > < span class = "l l-Scalar l-Scalar-Plain" > example-configmap< / span >
< span class = "nt" > data< / span > < span class = "p" > :< / span >
< span class = "nt" > SCRIPT_FILENAME< / span > < span class = "p" > :< / span > < span class = "s" > " /example/index.php" < / span >
< span class = "nt" > HTTP_PROXY< / span > < span class = "p" > :< / span > < span class = "s" > " " < / span >
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< / code > < / pre > < / div >
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Using the < em > namespace/< / em > prefix is also supported, for example:< / p >
< blockquote >
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< p > < code > nginx.ingress.kubernetes.io/fastcgi-params-configmap: "example-namespace/example-configmap"< / code > < / p >
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