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https://www.juniper.net/documentation/en_US/vsrx/topics/task/multi-task/security-vsrx-with-kvm-installing.html

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2- Create an VM ( with virt-manager ) and use the qcow2 HDD + add at list 2 interfaces

type: Redhat 7
Set RAM to 4096 MB and
set CPUs to 2
Network:  br0 ( mgt) and virbr0 ( for data )

/home/me/Downloads/juniper/qcow2files/vsrxremote-vmdisk-17.3R1.10.qcow2
or
/home/me/Downloads/juniper/qcow2files/vsrxhub-vmdisk-17.3R1.10.qcow2

See next page:     /etc/libvirt/qemu/vsrxremote.xml

     <feature policy='force' name='vmx'/>
     <feature policy='disable' name='invtsc'/>

It take very look time to boot-up ( could use:  virsh start vsrxremote --console )

vSRX Basic Config:

set system root-authentication plain-text-password set system host-name vsrxhub
set system name-server 8.8.8.8
set system services ssh root-login allow
set interfaces fxp0 unit 0 family inet address 192.168.0.62/24
set routing-options static route 0.0.0.0/0 next-hop 192.168.0.1

set interfaces ge-0/0/0.0 family inet address 1.2.0.62/24
11:47:28 -- commit and-quit
11:48:41 -- set security zones security-zone untrust
set system root-authentication plain-text-password  11:48:54 -- set security zones security-zone untrust interfaces ge-0/0/0
set security zones security-zone untrust host-inbound-traffic system-services pingconf