This article outlines the reason that users may receive the "error:[Error] Cannot enroll with empty hostname," error while enrolling their SRX HA Cluster in Sky ATP, and explains what must be done to prevent the error.

While enrolling their SRX HA Cluster in Sky ATP, users may receive the following error:

{primary:node0}
root@srx-1> op url <portal enrollment url>.slax
Platform is supported by Sky ATP: <device type>
Version <version> is valid for bootstrapping.
error: [Error] Cannot enroll with empty hostname
Please set hostname for your device

Users may receive this error when they attempt to enroll their SRX HA Cluster without having both SRX devices connected.

While enrolling the SRX HA Cluster in Sky ATP, both SRX devices in the HA Pair must be connected.

> show chassis cluster status

The output of the above command should contain both SRX nodes as shown below:

Monitor Failure codes:
    CS  Cold Sync monitoring        FL  Fabric Connection monitoring
    GR  GRES monitoring             HW  Hardware monitoring
    IF  Interface monitoring        IP  IP monitoring
    LB  Loopback monitoring         MB  Mbuf monitoring
    NH  Nexthop monitoring          NP  NPC monitoring
    SP  SPU monitoring              SM  Schedule monitoring
    CF  Config Sync monitoring      RE  Relinquish monitoring

Cluster ID: 1
Node   Priority Status               Preempt Manual   Monitor-failures

Redundancy group: 0 , Failover count: 1
node0  200      primary              no      no       None
node1  100      secondary            no      no       None

Redundancy group: 1 , Failover count: 1
node0  200      primary              no      no       None
node1  100      secondary            no      no       None

If the secondary node is missing from this output, it means that the peer is not connected and users will not be able to enroll the SRX HA Pair in Sky ATP.