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https://github.com/openfaas/faasd.git
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087a299f4c
A more limited version is added, for continuity. Signed-off-by: Alex Ellis (OpenFaaS Ltd) <alexellis2@gmail.com>
90 lines
2.1 KiB
Go
90 lines
2.1 KiB
Go
package cmd
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import (
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"context"
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"errors"
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"fmt"
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"os"
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"time"
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goexecute "github.com/alexellis/go-execute/v2"
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"github.com/spf13/cobra"
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)
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func makeServiceLogsCmd() *cobra.Command {
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var command = &cobra.Command{
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Use: "logs",
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Short: "View logs for a service",
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Long: `View logs for a service created by faasd from the docker-compose.yml file.`,
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Example: ` ## View logs for the gateway for the last hour
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faasd service logs gateway --since 1h
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## View logs for the cron-connector, and tail them
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faasd service logs cron-connector -f
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`,
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}
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command.Flags().Duration("since", 10*time.Minute, "How far back in time to include logs")
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command.Flags().BoolP("follow", "f", false, "Follow the logs")
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command.RunE = runServiceLogsE
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command.PreRunE = preRunServiceLogsE
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return command
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}
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func runServiceLogsE(cmd *cobra.Command, args []string) error {
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name := args[0]
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namespace, _ := cmd.Flags().GetString("namespace")
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follow, _ := cmd.Flags().GetBool("follow")
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since, _ := cmd.Flags().GetDuration("since")
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journalTask := goexecute.ExecTask{
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Command: "journalctl",
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Args: []string{"-o", "cat", "-t", fmt.Sprintf("%s:%s", namespace, name)},
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StreamStdio: true,
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}
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if follow {
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journalTask.Args = append(journalTask.Args, "-f")
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}
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if since != 0 {
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// Calculate the timestamp that is 'age' duration ago
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sinceTime := time.Now().Add(-since)
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// Format according to journalctl's expected format: "2012-10-30 18:17:16"
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formattedTime := sinceTime.Format("2006-01-02 15:04:05")
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journalTask.Args = append(journalTask.Args, fmt.Sprintf("--since=%s", formattedTime))
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}
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res, err := journalTask.Execute(context.Background())
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if err != nil {
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return err
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}
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if res.ExitCode != 0 {
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return fmt.Errorf("failed to get logs for service %s: %s", name, res.Stderr)
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}
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return nil
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}
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func preRunServiceLogsE(cmd *cobra.Command, args []string) error {
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if os.Geteuid() != 0 {
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return errors.New("this command must be run as root")
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}
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if len(args) == 0 {
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return errors.New("service name is required as an argument")
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}
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namespace, _ := cmd.Flags().GetString("namespace")
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if namespace == "" {
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return errors.New("namespace is required")
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}
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return nil
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}
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