anuragaw commented on a change in pull request #3575: [WIP DO NOT MERGE] Health
check feature for virtual router
URL: https://github.com/apache/cloudstack/pull/3575#discussion_r358742417
##########
File path:
server/src/main/java/com/cloud/network/router/VirtualNetworkApplianceManagerImpl.java
##########
@@ -1186,6 +1227,431 @@ protected void pushToUpdateQueue(final List<NetworkVO>
networks) throws Interrup
}
}
+ protected class FetchRouterHealthChecksResultTask extends
ManagedContextRunnable {
+ public FetchRouterHealthChecksResultTask() {
+ }
+
+ @Override
+ protected void runInContext() {
+ try {
+ final List<DomainRouterVO> routers =
_routerDao.listByStateAndManagementServer(VirtualMachine.State.Running,
mgmtSrvrId);
+ s_logger.debug("Found " + routers.size() + " running routers.
");
+
+ for (final DomainRouterVO router : routers) {
+ GetRouterMonitorResultsAnswer answer =
fetchAndUpdateRouterHealthChecks(router, false);
+ String checkFailsToRestartVr =
RouterHealthChecksFailuresToRestartVr.valueIn(router.getDataCenterId());
+ if (answer == null) {
+ s_logger.warn("Unable to fetch monitor results for
router " + router);
+ updateRouterConnectivityHealthCheck(router.getId(),
false, "Communication failed");
+ } else if (!answer.getResult()) {
+ s_logger.warn("Failed to fetch monitor results from
router " + router + " with details: " + answer.getDetails());
+ updateRouterConnectivityHealthCheck(router.getId(),
false, "Failed to fetch results with details: " + answer.getDetails());
+ } else {
+ updateRouterConnectivityHealthCheck(router.getId(),
true, "Successfully fetched data");
+ parseAndMergeDbHealthChecks(router.getId(),
answer.getMonitoringResults());
+
+ // Check failing tests and restart if needed
+ if (answer.getFailingChecks().size() > 0 &&
StringUtils.isNotBlank(checkFailsToRestartVr)) {
+ s_logger.info("Checking failed health checks to
see if router needs reboot");
+ for (String failedCheck :
answer.getFailingChecks()) {
+ if
(checkFailsToRestartVr.contains(failedCheck)) {
+ s_logger.info("Found failing health check
" + failedCheck + " so restarting router.");
+ rebootRouter(router.getId(), true);
+ }
+ }
+ }
+ }
+ }
+ } catch (final Exception ex) {
+ s_logger.error("Fail to complete the
FetchRouterHealthChecksResultTask! ", ex);
+ ex.printStackTrace();
+ }
+ }
+ }
+
+ private Map<String, Map<String, RouterHealthCheckResultVO>>
getHealthChecksFromDb(long routerId) {
+ List<RouterHealthCheckResultVO> healthChecksList =
routerHealthCheckResultDao.getHealthCheckResults(routerId);
+ Map<String, Map<String, RouterHealthCheckResultVO>> healthCheckResults
= new HashMap<>();
+ if (healthChecksList.isEmpty()) {
+ return healthCheckResults;
+ }
+
+ for (RouterHealthCheckResultVO healthCheck : healthChecksList) {
+ if (!healthCheckResults.containsKey(healthCheck.getCheckType())) {
+ healthCheckResults.put(healthCheck.getCheckType(), new
HashMap<>());
+ }
+
healthCheckResults.get(healthCheck.getCheckType()).put(healthCheck.getCheckName(),
healthCheck);
+ }
+
+ return healthCheckResults;
+ }
+
+ private RouterHealthCheckResultVO
updateRouterConnectivityHealthCheck(final long routerId, boolean connected,
String message) {
+ boolean newEntry = false;
+ RouterHealthCheckResultVO connectivityVO =
routerHealthCheckResultDao.getRouterHealthCheckResult(routerId, "connectivity",
"basic");
+ if (connectivityVO == null) {
+ connectivityVO = new RouterHealthCheckResultVO(routerId,
"connectivity", "basic");
+ newEntry = true;
+ }
+
+ connectivityVO.setCheckResult(connected);
+ connectivityVO.setLastUpdateTime(new Date());
+ connectivityVO.setCheckDetails(StringUtils.isNotEmpty(message) ?
message.getBytes(Charset.forName("US-ASCII")) : null);
+
+ if (newEntry) {
+ routerHealthCheckResultDao.persist(connectivityVO);
+ } else {
+ routerHealthCheckResultDao.update(connectivityVO.getId(),
connectivityVO);
+ }
+
+ return routerHealthCheckResultDao.getRouterHealthCheckResult(routerId,
"connectivity", "basic");
+ }
+
+ private List<RouterHealthCheckResult> parseAndMergeDbHealthChecks(final
long routerId, final String monitoringResult) {
+ if (StringUtils.isBlank(monitoringResult)) {
+ s_logger.warn("Attempted parsing empty monitoring results string
for router " + routerId);
+ return Collections.emptyList();
+ }
+
+ try {
+ s_logger.info("Parsing and updating DB health check data for
router: " + routerId);
+ s_logger.info("Retrieved data" + monitoringResult);
+ final Map<String, Map<String, RouterHealthCheckResultVO>>
checksInDb = getHealthChecksFromDb(routerId);
+ final Type t = new TypeToken<Map<String, Map<String, Map<String,
String>>>>() {}.getType();
+ final Map<String, Map<String, Map<String, String>>> checks =
GsonHelper.getGson().fromJson(monitoringResult, t);
Review comment:
Given the antiquated version is heavily used in code, I would prefer to keep
the updating of Gson as a separate task since this feature is large enough with
several minor fixes on Router monitoring. Thoughts?
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