Process configuration

The hpcd binary configuration is in /etc/sysconfig/hpcd. This file contains information such as the number of CPUs, reserved memory, and whether to use the over-provisioned mode for nonproduction traffic on laptops or VMs.

The following parameters may be changed.

• --smp controls the number of worker loaded (by default, one per CPU core, it can be lowered but never configured to more than the number of CPU cores) (e.g., --smp 32).

• --cpuset controls the number of worker loaded, as an alternative to --smp but with control on which CPU cores are used (e.g., --cpuset 0-31)

• --logger-log-level bpkcache=warn:hpcd=warn allows to alter the log level of various subsystems

• --overprovisionned allows to enable the over-provisioned mode, which is helpful for nonproduction traffic on laptops or VMs

• --etcd-endpoints localhost:2379 --etcd-root-prefix hpcd allows enabling the etcd connector if used. More details are provided in the view chapter.

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IMPORTANT

For a demo setup, in a VM or a laptop, remove --lock-memory true and add --overprovisionned

EdgePeak configuration

The core hpcd configuration file is /etc/broadpeak/hpc/hpcd.conf. This file contains most of the configuration.

Whenever you edit that file, you can use /usr/sbin/hpcd --test to validate the configuration file. The command hpc-ctl edit performs edit and validation steps in a single command line.

Editing & Validating Configuration

An all-in-one utility is available for editing config, validating it, and reformatting it if valid.

hpc-ctl config edit

Using an alternate editing workflow, validating configuration syntax without loading it or impacting a running daemon is possible using the following commands. The last command also dumps a json corresponding to the interpreted configuration, which can be helpful in complex configurations with conditional parts or leverage built-in templating capabilities to understand which vhosts and upstreams are declared.

hpc-ctl config validate /usr/sbin/hpcd --test /usr/sbin/hpcd --dump | jq '.'

The configuration file can be automatically reformatted to ensure consistency and ease of later edits.

hpc-ctl config reformat\`