mirror of
https://github.com/ceph/ceph-csi.git
synced 2025-03-09 17:09:29 +00:00
f87d06ed85
Several packages are only used while running the e2e suite. These packages are less important to update, as the they can not influence the final executable that is part of the Ceph-CSI container-image. By moving these dependencies out of the main Ceph-CSI go.mod, it is easier to identify if a reported CVE affects Ceph-CSI, or only the testing (like most of the Kubernetes CVEs). Signed-off-by: Niels de Vos <ndevos@ibm.com>
90 lines
2.1 KiB
Go
90 lines
2.1 KiB
Go
// Copyright The OpenTelemetry Authors
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// SPDX-License-Identifier: Apache-2.0
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package resource // import "go.opentelemetry.io/otel/sdk/resource"
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import (
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"bufio"
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"context"
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"errors"
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"io"
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"os"
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"regexp"
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semconv "go.opentelemetry.io/otel/semconv/v1.26.0"
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)
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type containerIDProvider func() (string, error)
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var (
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containerID containerIDProvider = getContainerIDFromCGroup
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cgroupContainerIDRe = regexp.MustCompile(`^.*/(?:.*[-:])?([0-9a-f]+)(?:\.|\s*$)`)
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)
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type cgroupContainerIDDetector struct{}
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const cgroupPath = "/proc/self/cgroup"
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// Detect returns a *Resource that describes the id of the container.
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// If no container id found, an empty resource will be returned.
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func (cgroupContainerIDDetector) Detect(ctx context.Context) (*Resource, error) {
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containerID, err := containerID()
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if err != nil {
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return nil, err
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}
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if containerID == "" {
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return Empty(), nil
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}
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return NewWithAttributes(semconv.SchemaURL, semconv.ContainerID(containerID)), nil
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}
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var (
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defaultOSStat = os.Stat
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osStat = defaultOSStat
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defaultOSOpen = func(name string) (io.ReadCloser, error) {
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return os.Open(name)
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}
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osOpen = defaultOSOpen
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)
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// getContainerIDFromCGroup returns the id of the container from the cgroup file.
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// If no container id found, an empty string will be returned.
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func getContainerIDFromCGroup() (string, error) {
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if _, err := osStat(cgroupPath); errors.Is(err, os.ErrNotExist) {
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// File does not exist, skip
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return "", nil
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}
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file, err := osOpen(cgroupPath)
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if err != nil {
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return "", err
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}
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defer file.Close()
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return getContainerIDFromReader(file), nil
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}
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// getContainerIDFromReader returns the id of the container from reader.
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func getContainerIDFromReader(reader io.Reader) string {
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scanner := bufio.NewScanner(reader)
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for scanner.Scan() {
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line := scanner.Text()
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if id := getContainerIDFromLine(line); id != "" {
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return id
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}
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}
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return ""
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}
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// getContainerIDFromLine returns the id of the container from one string line.
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func getContainerIDFromLine(line string) string {
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matches := cgroupContainerIDRe.FindStringSubmatch(line)
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if len(matches) <= 1 {
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return ""
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}
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return matches[1]
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}
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