func GetSystemdUnits(logger *log.Logger) map[string]types.SystemdUnit {
systemdUnits := map[string]types.SystemdUnit{}
logger.Notice("DS1001", "Performing systemd discovery")
for _, name := range []string{"openshift", "openshift-master", "openshift-node", "openshift-sdn-master", "openshift-sdn-node", "docker", "openvswitch", "iptables", "etcd", "kubernetes"} {
systemdUnits[name] = discoverSystemdUnit(logger, name)
if systemdUnits[name].Exists {
logger.Debug("DS1002", fmt.Sprintf("Saw systemd unit %s", name))
}
}
logger.Debug("DS1003", fmt.Sprintf("%v", systemdUnits))
return systemdUnits
}
func discoverSystemdUnit(logger *log.Logger, name string) types.SystemdUnit {
unit := types.SystemdUnit{Name: name, Exists: false}
if output, err := exec.Command("systemctl", "show", name).Output(); err != nil {
logger.Error("DS1004", fmt.Sprintf("Error running `systemctl show %s`: %s\nCannot analyze systemd units.", name, err.Error()))
} else {
attr := make(map[string]string)
for _, line := range strings.Split(string(output), "\n") {
elements := strings.SplitN(line, "=", 2) // Looking for "Foo=Bar" settings
if len(elements) == 2 { // found that, record it...
attr[elements[0]] = elements[1]
}
}
if val := attr["LoadState"]; val != "loaded" {
logger.Debug("DS1005", fmt.Sprintf("systemd unit '%s' does not exist. LoadState is '%s'", name, val))
return unit // doesn't exist - leave everything blank
} else {
unit.Exists = true
}
if val := attr["UnitFileState"]; val == "enabled" {
logger.Debug("DS1006", fmt.Sprintf("systemd unit '%s' is enabled - it will start automatically at boot.", name))
unit.Enabled = true
} else {
logger.Debug("DS1007", fmt.Sprintf("systemd unit '%s' is not enabled - it does not start automatically at boot. UnitFileState is '%s'", name, val))
}
if val := attr["ActiveState"]; val == "active" {
logger.Debug("DS1008", fmt.Sprintf("systemd unit '%s' is currently running", name))
unit.Active = true
} else {
logger.Debug("DS1009", fmt.Sprintf("systemd unit '%s' is not currently running. ActiveState is '%s'; exit code was %d.", name, val, unit.ExitStatus))
}
fmt.Sscanf(attr["StatusErrno"], "%d", &unit.ExitStatus) // ignore errors...
}
return unit
}
func GetSystemdUnits(logger *log.Logger) map[string]types.SystemdUnit {
systemdUnits := map[string]types.SystemdUnit{}
if !HasSystemctl() {
logger.Notice("DS1010", "Systemd not available, skipping unit discovery.")
return systemdUnits
}
logger.Notice("DS1001", "Performing systemd discovery")
for _, name := range []string{"origin-master", "origin-node", "atomic-openshift-master", "atomic-openshift-node", "docker", "openvswitch", "iptables", "etcd", "kubernetes"} {
systemdUnits[name] = discoverSystemdUnit(logger, name)
if systemdUnits[name].Exists {
logger.Debug("DS1002", fmt.Sprintf("Saw systemd unit %s", name))
}
}
logger.Debug("DS1003", fmt.Sprintf("%v", systemdUnits))
return systemdUnits
}