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14a022cbc0
* drivers/raw_exec: enable setting cgroup override values
This PR enables configuration of cgroup override values on the `raw_exec`
task driver. WARNING: setting cgroup override values eliminates any
gauruntee Nomad can make about resource availability for *any* task on
the client node.
For cgroup v2 systems, set a single unified cgroup path using `cgroup_v2_override`.
The path may be either absolute or relative to the cgroup root.
config {
cgroup_v2_override = "custom.slice/app.scope"
}
or
config {
cgroup_v2_override = "/sys/fs/cgroup/custom.slice/app.scope"
}
For cgroup v1 systems, set a per-controller path for each controller using
`cgroup_v1_override`. The path(s) may be either absolute or relative to
the controller root.
config {
cgroup_v1_override = {
"pids": "custom/app",
"cpuset": "custom/app",
}
}
or
config {
cgroup_v1_override = {
"pids": "/sys/fs/cgroup/pids/custom/app",
"cpuset": "/sys/fs/cgroup/cpuset/custom/app",
}
}
* drivers/rawexec: ensure only one of v1/v2 cgroup override is set
* drivers/raw_exec: executor should error if setting cgroup does not work
* drivers/raw_exec: create cgroups in raw_exec tests
* drivers/raw_exec: ensure we fail to start if custom cgroup set and non-root
* move custom cgroup func into shared file
---------
Co-authored-by: Michael Schurter <mschurter@hashicorp.com>
46 lines
959 B
Go
46 lines
959 B
Go
// Copyright (c) HashiCorp, Inc.
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// SPDX-License-Identifier: BUSL-1.1
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//go:build linux
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package cgroupslib
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import (
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"testing"
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"github.com/shoenig/test/must"
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)
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func TestCustomPathCG1(t *testing.T) {
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exp := "/sys/fs/cgroup/pids/custom/path"
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t.Run("absolute", func(t *testing.T) {
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result := CustomPathCG1("pids", "/sys/fs/cgroup/pids/custom/path")
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must.Eq(t, result, exp)
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})
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t.Run("relative", func(t *testing.T) {
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result := CustomPathCG1("pids", "custom/path")
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must.Eq(t, result, exp)
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})
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}
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func TestCustomPathCG2(t *testing.T) {
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exp := "/sys/fs/cgroup/custom.slice/path.scope"
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t.Run("unset", func(t *testing.T) {
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result := CustomPathCG2("")
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must.Eq(t, result, "")
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})
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t.Run("absolute", func(t *testing.T) {
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result := CustomPathCG2("/sys/fs/cgroup/custom.slice/path.scope")
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must.Eq(t, result, exp)
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})
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t.Run("relative", func(t *testing.T) {
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result := CustomPathCG2("custom.slice/path.scope")
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must.Eq(t, result, exp)
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})
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}
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