mirror of
https://github.com/siderolabs/talos.git
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76c2038b13
This PR contains generic simple TCP loadbalancer code, and glue code for firecracker provisioner to use this loadbalancer. K8s control plane is passed through the load balancer, and Talos API is passed only to the init node (for now, as some APIs, including kubeconfig, don't work with non-init node). Signed-off-by: Andrey Smirnov <smirnov.andrey@gmail.com>
55 lines
1.2 KiB
Go
55 lines
1.2 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 firecracker
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import (
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"errors"
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"fmt"
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"os"
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"syscall"
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)
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func stopProcessByPidfile(pidPath string) error {
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pidFile, err := os.Open(pidPath)
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if err != nil {
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if os.IsNotExist(err) {
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return nil
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}
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return fmt.Errorf("error checking PID file %q: %w", pidPath, err)
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}
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defer pidFile.Close() //nolint: errcheck
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var pid int
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if _, err = fmt.Fscanf(pidFile, "%d", &pid); err != nil {
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return fmt.Errorf("error reading PID for %q: %w", pidPath, err)
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}
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proc, err := os.FindProcess(pid)
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if err != nil {
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return fmt.Errorf("error finding process %d for %q: %w", pid, pidPath, err)
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}
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if err = proc.Signal(syscall.SIGTERM); err != nil {
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if err.Error() == "os: process already finished" {
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return nil
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}
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return fmt.Errorf("error sending SIGTERM to %d (path %q): %w", pid, pidPath, err)
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}
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if _, err = proc.Wait(); err != nil {
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if errors.Is(err, syscall.ECHILD) {
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return nil
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}
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return fmt.Errorf("error waiting for %d to exit (path %q): %w", pid, pidPath, err)
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}
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return nil
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}
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