Examples with TableTracker org.opennms.netmgt.snmp.TableTracker used on opensource projects

Example 1 with TableTracker

use of org.opennms.netmgt.snmp.TableTracker in project opennms by OpenNMS.

the class HostResourceSwRunMonitor method poll.

/**
 * {@inheritDoc}
 *
 * <P>
 * The poll() method is responsible for polling the specified address for
 * SNMP service availability.
 * </P>
 * @exception RuntimeException
 *                Thrown for any uncrecoverable errors.
 */
@Override
public PollStatus poll(MonitoredService svc, Map<String, Object> parameters) {
    InetAddress ipaddr = svc.getAddress();
    // Retrieve this interface's SNMP peer object
    // 
    final SnmpAgentConfig agentConfig = getAgentConfig(svc, parameters);
    final String hostAddress = InetAddressUtils.str(ipaddr);
    LOG.debug("poll: setting SNMP peer attribute for interface {}", hostAddress);
    // Get configuration parameters
    // 
    // This should never need to be overridden, but it can be in order to be used with similar tables.
    String serviceNameOid = ParameterMap.getKeyedString(parameters, "service-name-oid", HOSTRESOURCE_SW_NAME_OID);
    // This should never need to be overridden, but it can be in order to be used with similar tables.
    String serviceStatusOid = ParameterMap.getKeyedString(parameters, "service-status-oid", HOSTRESOURCE_SW_STATUS_OID);
    // This is the string that represents the service name to be monitored.
    String serviceName = ParameterMap.getKeyedString(parameters, "service-name", null);
    // The service name may appear in the table more than once. If this is set to true, all values must match the run level.
    String matchAll = ParameterMap.getKeyedString(parameters, "match-all", "false");
    // This is one of:
    // running(1),
    // runnable(2),    -- waiting for resource
    // -- (i.e., CPU, memory, IO)
    // notRunnable(3), -- loaded but waiting for event
    // invalid(4)      -- not loaded
    // 
    // This represents the maximum run-level, i.e. 2 means either running(1) or runnable(2) pass.
    String runLevel = ParameterMap.getKeyedString(parameters, "run-level", "2");
    // If "match-all" is true, there can be an optional "min-services" and "max-services" parameters that can define a range. The service is up if:
    // a) services_count >= min-services and services_count <= max-services
    // b) either one is not defined, then only one has to pass.
    // c) neither are defined, the monitor acts just like it used to - checking all instances to see if they are all running.
    // It is assumed that all services would have to pass the minimum run state test, no matter what the count.
    int minServices = ParameterMap.getKeyedInteger(parameters, "min-services", -1);
    int maxServices = ParameterMap.getKeyedInteger(parameters, "max-services", -1);
    // set timeout and retries on SNMP peer object
    // 
    agentConfig.setTimeout(ParameterMap.getKeyedInteger(parameters, "timeout", agentConfig.getTimeout()));
    agentConfig.setRetries(ParameterMap.getKeyedInteger(parameters, "retry", ParameterMap.getKeyedInteger(parameters, "retries", agentConfig.getRetries())));
    agentConfig.setPort(ParameterMap.getKeyedInteger(parameters, "port", agentConfig.getPort()));
    LOG.debug("poll: service= SNMP address= {}", agentConfig);
    PollStatus status = PollStatus.unavailable("HostResourceSwRunMonitor service not found, addr=" + hostAddress + ", service-name=" + serviceName);
    // Establish SNMP session with interface
    // 
    int matches = 0;
    try {
        LOG.debug("HostResourceSwRunMonitor.poll: SnmpAgentConfig address: {}", agentConfig);
        if (serviceName == null) {
            status.setReason("HostResourceSwRunMonitor no service-name defined, addr=" + hostAddress);
            LOG.warn("HostResourceSwRunMonitor.poll: No Service Name Defined! ");
            return status;
        }
        if (minServices > 0 && maxServices > 0 && minServices >= maxServices) {
            String reason = "min-services(" + minServices + ") should be less than max-services(" + maxServices + ")";
            status.setReason("HostResourceSwRunMonitor " + reason + ", addr=" + hostAddress + ", service-name=" + serviceName);
            LOG.warn("HostResourceSwRunMonitor.poll: {}.", reason);
            return status;
        }
        // This updates two maps: one of instance and service name, and one of instance and status.
        final SnmpObjId serviceNameOidId = SnmpObjId.get(serviceNameOid);
        final SnmpObjId serviceStatusOidId = SnmpObjId.get(serviceStatusOid);
        final Map<SnmpInstId, SnmpValue> nameResults = new HashMap<SnmpInstId, SnmpValue>();
        final Map<SnmpInstId, SnmpValue> statusResults = new HashMap<SnmpInstId, SnmpValue>();
        RowCallback callback = new RowCallback() {

            @Override
            public void rowCompleted(SnmpRowResult result) {
                nameResults.put(result.getInstance(), result.getValue(serviceNameOidId));
                statusResults.put(result.getInstance(), result.getValue(serviceStatusOidId));
            }
        };
        TimeoutTracker tracker = new TimeoutTracker(parameters, agentConfig.getRetries(), agentConfig.getTimeout());
        tracker.reset();
        tracker.startAttempt();
        TableTracker tableTracker = new TableTracker(callback, serviceNameOidId, serviceStatusOidId);
        try (SnmpWalker walker = SnmpUtils.createWalker(agentConfig, "HostResourceSwRunMonitor", tableTracker)) {
            walker.start();
            walker.waitFor();
            String error = walker.getErrorMessage();
            if (error != null && !error.trim().equals("")) {
                LOG.warn(error);
                return PollStatus.unavailable(error);
            }
        }
        // Iterate over the list of running services
        for (SnmpInstId nameInstance : nameResults.keySet()) {
            final SnmpValue name = nameResults.get(nameInstance);
            final SnmpValue value = statusResults.get(nameInstance);
            // See if the service name is in the list of running services
            if (name != null && value != null && match(serviceName, StringUtils.stripExtraQuotes(name.toString()))) {
                matches++;
                LOG.debug("poll: HostResourceSwRunMonitor poll succeeded, addr={}, service-name={}, value={}", hostAddress, serviceName, nameResults.get(nameInstance));
                // Using the instance of the service, get its status and see if it meets the criteria
                if (meetsCriteria(value, "<=", runLevel)) {
                    status = PollStatus.available(tracker.elapsedTimeInMillis());
                    // If we get here, that means the service passed the criteria, if only one match is desired we exit.
                    if ("false".equals(matchAll)) {
                        return status;
                    }
                // if we get here, that means the meetsCriteria test failed.
                } else {
                    String reason = "HostResourceSwRunMonitor poll failed, addr=" + hostAddress + ", service-name=" + serviceName + ", status=" + statusResults.get(nameInstance);
                    LOG.debug(reason);
                    status = PollStatus.unavailable(reason);
                    return status;
                }
            }
        }
        LOG.debug("poll: HostResourceSwRunMonitor the number of matches found for {} was {}", serviceName, matches);
    } catch (NumberFormatException e) {
        String reason = "Number operator used on a non-number " + e.getMessage();
        LOG.debug(reason);
        status = PollStatus.unavailable(reason);
    } catch (IllegalArgumentException e) {
        String reason = "Invalid SNMP Criteria: " + e.getMessage();
        LOG.debug(reason);
        status = PollStatus.unavailable(reason);
    } catch (Throwable t) {
        String reason = "Unexpected exception during SNMP poll of interface " + hostAddress;
        LOG.debug(reason, t);
        status = PollStatus.unavailable(reason);
    }
    // This will be executed only if match-all=true
    boolean minOk = minServices > 0 ? matches >= minServices : true;
    boolean maxOk = maxServices > 0 ? matches <= maxServices : true;
    if (!minOk && maxServices < 0) {
        // failed min-services only
        String reason = "HostResourceSwRunMonitor poll failed: service-count(" + matches + ") >= min-services(" + minServices + "), addr=" + hostAddress + ", service-name=" + serviceName;
        LOG.debug(reason);
        status = PollStatus.unavailable(reason);
    }
    if (!maxOk && minServices < 0) {
        // failed max-services only
        String reason = "HostResourceSwRunMonitor poll failed: service-count(" + matches + ") <= max-services(" + maxServices + "), addr=" + hostAddress + ", service-name=" + serviceName;
        LOG.debug(reason);
        status = PollStatus.unavailable(reason);
    }
    if ((!minOk || !maxOk) && minServices > 0 && maxServices > 0) {
        // failed both (bad range)
        String reason = "HostResourceSwRunMonitor poll failed: min-services(" + minServices + ") >= service-count(" + matches + ") <= max-services(" + maxServices + "), addr=" + hostAddress + ", service-name=" + serviceName;
        LOG.debug(reason);
        status = PollStatus.unavailable(reason);
    }
    return status;
}

Example 2 with TableTracker

use of org.opennms.netmgt.snmp.TableTracker in project opennms by OpenNMS.

the class NetScalerGroupHealthMonitor method poll.

public PollStatus poll(MonitoredService svc, Map<String, Object> parameters) {
    InetAddress ipaddr = svc.getAddress();
    final SnmpAgentConfig agentConfig = getAgentConfig(svc, parameters);
    final String hostAddress = InetAddressUtils.str(ipaddr);
    PollStatus status = PollStatus.unavailable("NetScalerGroupHealthMonitor: cannot determinate group health, addr=" + hostAddress);
    int groupHealth = ParameterMap.getKeyedInteger(parameters, "group-health", 60);
    String groupName = ParameterMap.getKeyedString(parameters, "group-name", null);
    if (groupName == null) {
        status.setReason("NetScalerGroupHealthMonitor no group-name defined, addr=" + hostAddress);
        LOG.warn("NetScalerGroupHealthMonitor.poll: No Service Name Defined!");
        return status;
    }
    int snLength = groupName.length();
    final StringBuilder serviceOidBuf = new StringBuilder(SVC_GRP_MEMBER_STATE);
    serviceOidBuf.append(".").append(Integer.toString(snLength));
    for (byte thisByte : groupName.getBytes()) {
        serviceOidBuf.append(".").append(Byte.toString(thisByte));
    }
    LOG.debug("For group name '{}', OID to check is {}", groupName, serviceOidBuf.toString());
    try {
        final SnmpObjId groupStateOid = SnmpObjId.get(serviceOidBuf.toString());
        final Map<SnmpInstId, SnmpValue> hostResults = new HashMap<SnmpInstId, SnmpValue>();
        RowCallback callback = new RowCallback() {

            @Override
            public void rowCompleted(SnmpRowResult result) {
                hostResults.put(result.getInstance(), result.getValue(groupStateOid));
            }
        };
        TableTracker tracker = new TableTracker(callback, groupStateOid);
        try (SnmpWalker walker = SnmpUtils.createWalker(agentConfig, "NetScalerGroupHealthMonitor", tracker)) {
            walker.start();
            walker.waitFor();
        }
        int totalServers = hostResults.size();
        if (totalServers == 0) {
            status = PollStatus.unavailable("NetScalerGroupHealthMonitor poll failed: there are 0 servers on group " + groupName + " for " + hostAddress);
            LOG.debug(status.getReason());
        }
        int activeServers = 0;
        for (SnmpValue v : hostResults.values()) {
            if (v.toInt() == 7) {
                activeServers++;
            }
        }
        double health = (new Double(activeServers) / new Double(totalServers)) * 100.0;
        LOG.debug("There are {} of {} active servers ({}%) on group {} for NetScaler {}", activeServers, totalServers, health, groupName, hostAddress);
        if (health >= groupHealth) {
            status = PollStatus.available();
        } else {
            status = PollStatus.unavailable("NetScalerGroupHealthMonitor poll failed: there are " + activeServers + " of " + totalServers + " servers active (" + health + "%) on group " + groupName + ", which is less than " + groupHealth + "% for " + hostAddress);
            LOG.debug(status.getReason());
        }
    } catch (Throwable t) {
        status = PollStatus.unavailable("Unexpected exception during SNMP poll of interface " + hostAddress);
        LOG.warn(status.getReason(), t);
    }
    return status;
}