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908fd8789c
The new command `talosctl cgroups` fetches cgroups snapshot from the machine, parses it fully, enhances with additional information (e.g. resolves pod names), and presents a customizable view of cgroups configuration (e.g. limits) and current consumption. Signed-off-by: Andrey Smirnov <andrey.smirnov@siderolabs.com>
57 lines
1.1 KiB
Go
57 lines
1.1 KiB
Go
// This Source Code Form is subject to the terms of the Mozilla Public
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// License, v. 2.0. If a copy of the MPL was not distributed with this
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// file, You can obtain one at http://mozilla.org/MPL/2.0/.
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package cgroups
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import (
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"archive/tar"
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"compress/gzip"
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"fmt"
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"io"
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"path/filepath"
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)
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// TreeFromTarGz builds a crgroup tree from the tar.gz reader.
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//
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// It is assumed to work with output of `talosctl cp /sys/fs/cgroup -`.
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func TreeFromTarGz(r io.Reader) (*Tree, error) {
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gzReader, err := gzip.NewReader(r)
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if err != nil {
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return nil, err
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}
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defer gzReader.Close() //nolint:errcheck
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tarReader := tar.NewReader(gzReader)
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tree := &Tree{
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Root: &Node{},
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}
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for {
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header, err := tarReader.Next()
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if err == io.EOF {
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break
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}
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if err != nil {
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return nil, err
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}
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if header.Typeflag != tar.TypeReg {
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continue
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}
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directory, filename := filepath.Split(header.Name)
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node := tree.Find(directory)
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if err = node.Parse(filename, tarReader); err != nil {
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return nil, fmt.Errorf("failed to parse %q: %w", header.Name, err)
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}
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}
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return tree, nil
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}
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