instances.conf
instances.conf — vela(8) instances database
Description
The instances.conf file describes the
vela(8)
instances to be run on the system. It is processed by
velactl(8)
line by line, each line having the structure described below. Empty lines and lines
beginning with '#' are comments ignored by velactl.
Structure
instance-name parameters [-- velactl-options]
instance-name is the name of the Vela instance to be started; it is passed to vela with its --as parameter. Instance names may consist of the characters [a-zA-Z0-9_] and must begin with a letter.
parameters are space separated parameters entered into the vela command-line. For details on these command-line parameters see vela(8).
velactl-options are space separated parameters control startup specific options. They are processed by velactl itself. The following velactl options are available:
- --auto-restart or -A
Enable the automatic restart feature of velactl. When an instance is in auto-restart mode, it is restarted automatically in case the instance exits.
- --no-auto-restart or -a
Disable automatic restart for this instance.
- --fd-limit <number> or -f <number>
Set the file descriptor limit to <number>. The file descriptor limit defaults to the number of threads (specified by the --threads parameter of vela(8)) multiplied by 4.
- --num-of-processes <number> or -P <number>
Run <number> of processes for the instance. velactl starts exactly one Vela process in master mode and <number> of slave Vela processes. This mode of operation is incompatible with old-style dispatchers, you must use the new rule-based policy with this option.
Examples
vela_ftp --policy /etc/vela/policy.py --verbose 5
The line above describes a Vela instance named vela_ftp using policy file /etc/vela/policy.py, and having verbosity level 5.
vela_intra -v4 -p /etc/vela/policy.py --threads 500 --no-auto-restart --fd-limit 1024 --process-limit 512
This line describes a vela instance named vela_intra using the policy
file /etc/vela/policy.py, verbosity level 4. The maximum number of
threads is set to 500, file descriptor limit to 1024, process limit to 512.
Published on February 29, 2024
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