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Restart already running rsyslog to update configuration

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This commit is contained in:
Anastasia Lubennikova
2025-03-05 16:55:57 +00:00
parent 43afb9e2f4
commit c755aafe76
1 changed files with 16 additions and 5 deletions
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21
compute_tools/src/rsyslog.rs
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@@ -22,12 +22,23 @@ fn get_rsyslog_pid() -> Option<String> {
}
// Start rsyslogd with the specified configuration file
// If it is already running, do nothing.
// If it is already running - restart it.
// This is necessary, because there is no other way to reload the rsyslog configuration.
//
// Rsyslogd shouldn't lose any messages, because of the restart,
// because it tracks the last read position in the log files
// and will continue reading from that position.
// TODO: test it properly
//
fn start_rsyslog(rsyslog_conf_path: &str) -> Result<()> {
let pid = get_rsyslog_pid();
if let Some(pid) = pid {
info!("rsyslogd is already running with pid: {}", pid);
return Ok(());
let old_pid = get_rsyslog_pid();
if let Some(pid) = old_pid {
info!("rsyslogd is already running with pid: {}, restart it", pid);
// kill it to restart
let _ = Command::new("pkill")
.arg("rsyslogd")
.output()
.context("Failed to stop rsyslogd")?;
}
let _ = Command::new("/usr/sbin/rsyslogd")