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configurationenvironment-variablesvarnishvarnish-vcl

How to inject environment variables in Varnish configuration

I have 2 environments variables :

echo $FRONT1_PORT_8080_TCP_ADDR # 172.17.1.80
echo $FRONT2_PORT_8081_TCP_ADDR # 172.17.1.77

I want to inject them in a my default.vcl like : 

backend front1 {
    .host = $FRONT1_PORT_8080_TCP_ADDR;
}

But I got an syntax error on the $ char.

I've also tried with user variables but I can't define them outside vcl_recv.

How can I retrieve my 2 values in the VCL ?

Solution

  • I've managed to parse my vcl 

    backend front1 {
    .host = ${FRONT1_PORT_8080_TCP_ADDR};
}

    With a script:

    envs=`printenv`

for env in $envs
do
    IFS== read name value <<< "$env"

    sed -i "s|\${${name}}|${value}|g" /etc/varnish/default.vcl
done