On the engine host
. check contents of /var/log/ovirt-engine/engine.log

. check the output of the commands:
systemctl status ovirt-engine
systemctl status httpd

. check contents of JBoss instance related logs
/var/log/ovirt-engine/server.log
In 4.5.x you should see something like this (see the deployed engine.ear
and ovirt-web-ui.war lines for example):

2024-03-26 17:26:29,515+01 INFO  [org.wildfly.extension.undertow]
(ServerService Thread Pool -- 47) WFLYUT0021: Registered web context:
'/ovirt-engine/docs' for server 'default-server'
2024-03-26 17:26:29,530+01 INFO  [org.wildfly.extension.undertow]
(ServerService Thread Pool -- 46) WFLYUT0021: Registered web context: '/'
for server 'default-server'
2024-03-26 17:26:29,575+01 INFO  [org.wildfly.extension.undertow]
(ServerService Thread Pool -- 46) WFLYUT0021: Registered web context:
'/ovirt-engine/services' for server 'default-server'
2024-03-26 17:26:29,588+01 WARN
 [org.jboss.jca.core.connectionmanager.pool.strategy.OnePool]
(ServerService Thread Pool -- 46) IJ000407: No lazy enlistment available
for ENGINEDataSource
2024-03-26 17:26:29,633+01 INFO  [org.wildfly.extension.undertow]
(ServerService Thread Pool -- 51) WFLYUT0021: Registered web context:
'/ovirt-engine' for server 'default-server'
2024-03-26 17:26:29,648+01 WARN
 [org.jboss.jca.core.connectionmanager.pool.strategy.OnePool]
(ServerService Thread Pool -- 46) IJ000407: No lazy enlistment available
for DWHDataSource
2024-03-26 17:26:29,666+01 INFO  [org.wildfly.extension.undertow]
(ServerService Thread Pool -- 46) WFLYUT0021: Registered web context:
'/ovirt-engine/webadmin' for server 'default-server'
2024-03-26 17:26:29,843+01 INFO  [org.wildfly.extension.undertow]
(ServerService Thread Pool -- 49) WFLYUT0021: Registered web context:
'/ovirt-engine/sso' for server 'default-server'
2024-03-26 17:26:30,097+01 INFO  [org.jboss.as.clustering.infinispan]
(ServerService Thread Pool -- 50) WFLYCLINF0002: Started timeout-base cache
from ovirt-engine container
2024-03-26 17:26:31,880+01 INFO  [org.jboss.as.server] (ServerService
Thread Pool -- 27) WFLYSRV0010: Deployed "restapi.war" (runtime-name :
"restapi.war")
2024-03-26 17:26:31,880+01 INFO  [org.jboss.as.server] (ServerService
Thread Pool -- 27) WFLYSRV0010: Deployed "ovirt-web-ui.war" (runtime-name :
"ovirt-web-ui.war")
2024-03-26 17:26:31,880+01 INFO  [org.jboss.as.server] (ServerService
Thread Pool -- 27) WFLYSRV0010: Deployed "apidoc.war" (runtime-name :
"apidoc.war")
2024-03-26 17:26:31,880+01 INFO  [org.jboss.as.server] (ServerService
Thread Pool -- 27) WFLYSRV0010: Deployed "engine.ear" (runtime-name :
"engine.ear")
2024-03-26 17:26:31,930+01 INFO  [org.jboss.as.server] (Controller Boot
Thread) WFLYSRV0212: Resuming server
2024-03-26 17:26:31,933+01 INFO  [org.jboss.as] (Controller Boot Thread)
WFLYSRV0025: WildFly Full 24.0.1.Final (WildFly Core 16.0.1.Final) started
in 16651ms - Started 1676 of 1890 services (393 services are lazy, passive
or on-demand)
2024-03-26 17:26:31,940+01 INFO  [org.jboss.as] (Controller Boot Thread)
WFLYSRV0060: Http management interface listening on
http://127.0.0.1:8706/management
2024-03-26 17:26:31,940+01 INFO  [org.jboss.as] (Controller Boot Thread)
WFLYSRV0051: Admin console listening on http://127.0.0.1:8706
2024-03-26 17:41:31,872+01 INFO
 [org.apache.sshd.common.util.security.eddsa.EdDSASecurityProviderRegistrar]
(EE-ManagedExecutorService-hostUpdatesChecker-Thread-1)
getOrCreateProvider(EdDSA) created instance of
net.i2p.crypto.eddsa.EdDSASecurityProvider

eventually if in error try to restart ovirt-engine service
systemctl restart ovirt-engine

HIH,
Gianluca



On Fri, Mar 29, 2024 at 9:59 AM Sachendra Shukla <
sachendra.shu...@yagnaiq.com> wrote:

> Hi Alex,
>
> After conducting a thorough check, we have confirmed that all virtual
> machines are operating smoothly, and the network is functioning without any
> issues (we can successfully SSH into both the VMs and the manager).
> Additionally, there is available storage on both the node and the manager.
> However, we are encountering difficulty accessing the oVirt manager
> console, as we are consistently receiving a "503 Service Unavailable" error.
>
> Thanks,
> Sachendra
>
>
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