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// Copyright (c) 2019-2022, Sylabs Inc. All rights reserved.
// This software is licensed under a 3-clause BSD license. Please consult the
// LICENSE.md file distributed with the sources of this project regarding your
// rights to use or distribute this software.
package main
import (
"log"
"github.com/sylabs/singularity/v4/internal/pkg/cgroups"
pluginapi "github.com/sylabs/singularity/v4/pkg/plugin"
clicallback "github.com/sylabs/singularity/v4/pkg/plugin/callback/cli"
"github.com/sylabs/singularity/v4/pkg/runtime/engine/config"
singularity "github.com/sylabs/singularity/v4/pkg/runtime/engine/singularity/config"
"github.com/sylabs/singularity/v4/pkg/sylog"
)
// Plugin is the only variable which a plugin MUST export.
// This symbol is accessed by the plugin framework to initialize the plugin
var Plugin = pluginapi.Plugin{
Manifest: pluginapi.Manifest{
Name: "github.com/sylabs/singularity/config-example-plugin",
Author: "Sylabs Team",
Version: "0.1.0",
Description: "This is a short example config plugin for Singularity",
},
Callbacks: []pluginapi.Callback{
(clicallback.SingularityEngineConfig)(callbackCgroups),
},
}
func callbackCgroups(common *config.Common) {
c, ok := common.EngineConfig.(*singularity.EngineConfig)
if !ok {
log.Printf("Unexpected engine config")
return
}
cfg := cgroups.Config{
Devices: nil,
Memory: &cgroups.LinuxMemory{
Limit: &[]int64{1024 * 1}[0],
},
}
data, err := cfg.MarshalJSON()
if err != nil {
sylog.Errorf("While Marshalling cgroups config to JSON: %s", err)
return
}
sylog.Infof("Overriding cgroups config")
c.SetCgroupsJSON(data)
}
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