On 26/07/2017 11:44, Gianluca Cecchi wrote: > On Wed, Jul 26, 2017 at 12:20 PM, Steve Rubie-Todd <steve at rubie-todd.com> > wrote: > >> Hi >> >> I am trying to run CoreOS (Container Linux) as a guest OS using KVM/QEMU. >> One of their suggestions is to pass config info into the VM using the >> "fw_cfg" option . When I try this I get the error "-fw_cfg invalid option". >> If I run the vm with the help option it does not list the fw_cfg option. >> However, according to the qemu documentation, see here < >> https://qemu.weilnetz.de/doc/qemu-doc.html#Debug_002fExpert-options>, >> they support this option. >> >> The command used to run the vm is: >> >> /usr/bin/qemu-system-x86_64 -name CL-IGN-1 -m 1024 \ >> -net nic,vlan=0,model=virtio \ >> -net user,vlan=0,hostfwd=tcp::2222-:22,hostname=CL-IGN-1 \ >> -drive if=virtio,file=./coreos_production_qemu_image.img \ >> -fw_cfg name=opt/com.coreos/config,file=./CL-IGN-1.ignconfig >> >> qemu-system-x86_64: -fw_cfg: invalid option >> >> I also tried using /usr/libexec/qemu-kvm but got the same error. >> >> I am running:: >> >> CentOS Linux release 7.3.1611 (Core) >> >> qemu-system-x86-2.0.0-1.el7.6.x86_64 >> qemu-kvm-1.5.3-126.el7.x86_64 >> >> >> Thanks. >> > Hello, > I think (based also on your qemu-kvm version man page), that the feature is > not present in qemu-kvm version provided by base CentOS. > But you can use packages provided by the Virtualization SIG > Good idea especially if virtualization is core service for your server. > See here the announcement: > https://lists.centos.org/pipermail/centos-announce/2015-October/021445.html > > So you can follow what detailed there: > yum install centos-release-qemu-ev > yum install qemu-kvm-ev > > I reproduced a situation on a CentOS 7.3 server where qemu-kvm is already > present and you can do > > yum install centos-release-qemu-ev > > and then > > yum update qemu-kvm-ev > ... > Dependencies Resolved > > ==================================================================================================== > Package Arch Version > Repository Size > ==================================================================================================== > Installing: > qemu-img-ev x86_64 10:2.6.0-28.el7.10.1 > centos-qemu-ev 1.0 M > replacing qemu-img.x86_64 10:1.5.3-126.el7_3.10 > qemu-kvm-common-ev x86_64 10:2.6.0-28.el7.10.1 > centos-qemu-ev 516 k > replacing qemu-kvm-common.x86_64 10:1.5.3-126.el7_3.10 > qemu-kvm-ev x86_64 10:2.6.0-28.el7.10.1 > centos-qemu-ev 2.5 M > replacing qemu-kvm.x86_64 10:1.5.3-126.el7_3.10 > > Transaction Summary > ==================================================================================================== > Install 3 Packages > > so it seems it automatically obsoletes the "standard" packages, because > they overlap in filesand you can have only one installed > > And now you should have the -fw_cfg option. > > BTW: the version of the hypervisor used by Virtualization SIG is the same > used by the Virtualization Platform project named oVirt ( > http://www.ovirt.org), upstream for commercial RHEV solution, so rock > solid, I'm currently using it extensively ;-) > > HIH, > Gianluca > _______________________________________________ > CentOS mailing list > CentOS at centos.org > https://lists.centos.org/mailman/listinfo/centos > Many thanks for your quick response Gianluca. I installed the "ev" packages and now I can pass the "fw_cfg" option to the vm. Regards Steve.