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Version: Tenzir v4.3

Modifiers

Operator modifiers are keywords that may occur before an operator.

Location Overrides

Pipelines run across multiple processes:

  • The local tenzir process, and
  • the remote tenzir-node processes (commonly referred to as nodes).

Some pipeline operators prefer running either local or remote. For example, the from and to operators run locally, and the serve operator runs remotely by default. Operators that do not have a preferred location use the location of the previous operator.

The special keywords local and remote allow for specifying the location of an operator explicitly. They may occur before any operator. For example, the pipeline read json | remote pass | write json reads JSON from stdin locally, transfers it to a remote node to do nothing with the data, and then transfers it back to write JSON to stdout locally.

There are generally two scenarios in which you may want to use location overrides:

  1. Move compute-heavy operators to a separate machine: Operators like summarize may require a lot of resources. When collecting events from an edge node, you may want to instead use remote summarize to run the computation on the compute-heavy machine.

  2. Change local operators to run remotely, to allow for reading a file from a remote host, e,g., remote from file /tmp/suricata.sock read suricata. Because such an operation allows for remotely reading files or executing potentially unwanted operators, you must set the following configuration option to enable running local operators remotely (and vice versa):

    tenzir.yaml
    tenzir:
    allow-unsafe-pipelines: true