HAProxy Enterprise Documentation 2.4r1

del acl

Delete a single value from an ACL expression or file.


An ACL is split into four parts:

  • a name for the ACL, which you choose

  • a fetch to collect information from the client's session

  • optional flags

  • a value to match against

In the example below, we mark these parts:

frontend www
   bind :80
   #   name       fetch  flags       value
   acl static_url  path   -i -m beg   /images/ /scripts/

Here, there is initially two values, /images/ and /scripts/. Use del acl to delete a value.

You can also store values in a file and then reference that file in an acl statement by using the -f /path/to/file flag. Use the del acl command to delete a value to the file. Note that this only removes it from HAProxy Enterprise's runtime memory and not to the file on disk.


In this example, we demonstrate two ways to delete an ACL from runtime memory. The first way references the ACL by its unique identifier. The second way uses its path-based name.

  1. Use del acl to remove the value /scripts/. Pass to it the ID of the ACL:

    $ echo "del acl #0 /scripts/" | \
       sudo socat stdio unix-connect:/var/run/hapee-2.4/hapee-lb.sock

    This updates the ACL so that it represents this expression:

    frontend www
       bind :80
       acl static_url path -i -m beg /images/

In the next example, we remove the value /stylesheets/ from the ACL file /etc/hapee-2.4/paths.acl:

$ echo "del acl /etc/hapee-2.4/paths.acl /stylesheets/" | \
   sudo socat stdio unix-connect:/var/run/hapee-2.4/hapee-lb.sock

See also

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