search for: overlay2

...: compat: 1.1 lazy refcounts: false refcount bits: 16 corrupt: false # try the same with virsh vol-create-as; note how you must specify filesize and the backing file format is *wrong* (leading to an unusable overlay disk) [root@singularity images]# virsh vol-create-as default overlay2.qcow2 8G --format qcow2 --backing-vol /var/lib/libvirt/images/base.qcow2 Vol overlay2.qcow2 created [root@singularity images]# qemu-img info overlay2.qcow2 image: overlay2.qcow2 file format: qcow2 virtual size: 8.0G (8589934592 bytes) disk size: 17K cluster_size: 65536 backing file: /var/lib/libvi...

...ain backing > relation，it need we use qemu-img rebase amend snapshot‘s > backingfile， As you note there's the 'qemu-img commit' primitive that allows you to commit the changes in an overlay back into its base image: If you have: base.qcow2 <-- overlay1.qcow2 <-- overlay2.qcow2 And, if you do: $ qemu-img commit overlay2.qcow2 It'll commit the contents of overlay2.qcow2 into overlay1.qcow2. And, indeed use the 'qemu-img rebase' to modify the backing file is the only method I know of, for offline operations. > the main question is when we u...

...tected RPM version 4.11 > supermin: package handler: fedora/rpm > supermin: acquiring lock on /var/tmp/.guestfs-0/lock > supermin: if-newer: output does not need rebuilding > libguestfs: finished building supermin appliance > libguestfs: trace: disk_create "/tmp/libguestfsr2XJRP/overlay2.qcow2" "qcow2" -1 "backingfile:/var/tmp/.guestfs-0/appliance.d/root" "backingformat:raw" > libguestfs: command: run: qemu-img > libguestfs: command: run: \ create > libguestfs: command: run: \ -f qcow2 > libguestfs: command: run: \ -o backing_file=/var...

...70256ms] finished building supermin appliance libguestfs: command: run: qemu-img libguestfs: command: run: \ create libguestfs: command: run: \ -f qcow2 libguestfs: command: run: \ -o backing_file=/var/tmp/.guestfs-0/appliance.d/root,backing_fmt=raw libguestfs: command: run: \ /tmp/libguestfsCiXvwb/overlay2 Formatting '/tmp/libguestfsCiXvwb/overlay2', fmt=qcow2 size=4294967296 backing_file='/var/tmp/.guestfs-0/appliance.d/root' backing_fmt='raw' encryption=off cluster_size=65536 lazy_refcounts=off libguestfs: [70525ms] create libvirt XML libguestfs: command: run: dmesg | grep -...

Hi everyone! I use the libvirt(version: 1.2.2) and QEMU(version: 2.2.1) to test qemu snapshot features: I tried virsh blockcommit when VM offline, the virsh blockcommit failed: the error messase as below: error: Requested operation is not valid: domain is not running when I start the VM, the virsh blockcommit work fine! my question is：we need

...en.centos.org/2017/09/new-centos-atomic-host-with-overlayfs-storage/ > Interesting, but it doesn't help me: I can't rebuild the server, it's in use, and I yum installed docker from the std. repos. What I see from the links tells me how to switch storage, not how to manually configure overlay2 storage, and whether I can do as I said, and point it to an NFS-mounted location. mark

...5.1.19 supermin: rpm: detected RPM version 4.11 supermin: package handler: fedora/rpm supermin: acquiring lock on /var/tmp/.guestfs-0/lock supermin: if-newer: output does not need rebuilding libguestfs: finished building supermin appliance libguestfs: trace: disk_create "/tmp/libguestfsr2XJRP/overlay2.qcow2" "qcow2" -1 "backingfile:/var/tmp/.guestfs-0/appliance.d/root" "backingformat:raw" libguestfs: command: run: qemu-img libguestfs: command: run: \ create libguestfs: command: run: \ -f qcow2 libguestfs: command: run: \ -o backing_file=/var/tmp/.guestfs-0/appl...

...00011ms] finished building supermin appliance libguestfs: command: run: qemu-img libguestfs: command: run: \ create libguestfs: command: run: \ -f qcow2 libguestfs: command: run: \ -o backing_file=/var/tmp/.guestfs-0/appliance.d/root,backing_fmt=raw libguestfs: command: run: \ /tmp/libguestfsqw6Xky/overlay2 Formatting '/tmp/libguestfsqw6Xky/overlay2', fmt=qcow2 size=4294967296 backing_file='/var/tmp/.guestfs-0/appliance.d/root' backing_fmt='raw' encryption=off cluster_size=65536 lazy_refcounts=off libguestfs: set_socket_create_context: context_new failed: kernel: Invalid argume...

This problem occurs on certain machines but I can't tell why and how exactly to fix it. The message suggests a problem with kernel modules, but they all seem to load successfully, including many virtio modules. Best Regards, Peter

...n backing > relation，it need we use qemu-img rebase amend snapshot‘s > backingfile， As you note there's the 'qemu-img commit' primitive that allows you to commit the changes in an overlay back into its base image: If you have: base.qcow2 <-- overlay1.qcow2 <-- overlay2.qcow2 And, if you do: $ qemu-img commit overlay2.qcow2 It'll commit the contents of overlay2.qcow2 into overlay1.qcow2. And, indeed use the 'qemu-img rebase' to modify the backing file is the only method I know of, for offline operations. > the main question is when...

...guestfs: finished building supermin appliance libguestfs: command: run: qemu-img libguestfs: command: run: \ create libguestfs: command: run: \ -f qcow2 libguestfs: command: run: \ -o backing_file=/var/tmp/.guestfs-0/appliance.d/root,backing_fmt=raw libguestfs: command: run: \ /tmp/libguestfs8AN8TK/overlay2.qcow2 Formatting '/tmp/libguestfs8AN8TK/overlay2.qcow2', fmt=qcow2 size=4294967296 backing_file=/var/tmp/.guestfs-0/appliance.d/root backing_fmt=raw cluster_size=65536 lazy_refcounts=off refcount_bits=16 libguestfs: set_socket_create_context: getcon failed: (none): Invalid argument [you can...

Hi All. I am currently running docker 1.13 on Centos 7 boxes with devicemapper storage plugin. I would like to know what are your experiences in regard to: - storage plugins - kernel versions - stability I consider upgrade to docker 17.03.1 and would like to choose most stable combination of kernel/storage plugin. Thanks for all info! BR, Rafal.

I may have missed some overnight replies to my question from yesterday - if so, sorry. >From my googling, it looks like I should change from the loopback device to overlayFS (with overlay2). What I haven't found is, first and foremost, more clarity on configuring storage. It *appears* that the loopback storage is just a directory under /var/lib/docker (yet I see a reference in someone's blog to ~docker - *is* /var/lib/docker intended as ~docker? Can I make a docker director...

Hi everyone, I've been running some tests on Travis CI with CentOS 7 and CentOS 8 based Docker containers and having issues with the CentOS 8 ones. With the centos:8 image, the RPM database eventually gets corrupted due to the default overlay2 storage driver used by Docker. This issue doesn't show with the centos:7 container. It already comes with the "fastestmirror" and "ovl" plugins installed. The "ovl" plugin is a workaround to avoid this corruption. See the bottom of https://docs.docker.com/storage/...

...1.16 supermin: rpm: detected RPM version 4.11 supermin: package handler: fedora/rpm supermin: acquiring lock on /var/tmp/.guestfs-1001/lock supermin: if-newer: output does not need rebuilding libguestfs: finished building supermin appliance libguestfs: trace: disk_create "/tmp/libguestfsGvUr1O/overlay2" "qcow2" -1 "backingfile:/var/tmp/.guestfs-1001/appliance.d/root" "backingformat:raw" libguestfs: command: run: qemu-img libguestfs: command: run: \ create libguestfs: command: run: \ -f qcow2 libguestfs: command: run: \ -o backing_file=/var/tmp/.guestfs-1001/appl...

...ow2" cache="unsafe"/> <address type="drive" controller="0" bus="0" target="0" unit="0"/> </disk> <disk type="file" device="disk"> <source file="/tmp/libguestfsdTUUkY/overlay2"/> <target dev="sdb" bus="scsi"/> <driver name="qemu" type="qcow2" cache="unsafe"/> <address type="drive" controller="0" bus="0" target="1" unit="0"/>...

...Host still defaults to devicemapper storage, but you can switch to OverlayFS using the following commands: $ systemctl stop docker $ atomic storage reset # Reallocate space to the root VG - tweak how much to your liking $ lvm lvextend -r -l +50%FREE atomicos/root $ atomic storage modify --driver overlay2 $ systemctl start docker For more information on storage management options, see the upstream RHEL documentation (https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux_atomic_host/7/html-single/managing_containers/#overlay_graph_driver). ## Containerized Master CentOS Atomic Ho...

...mp/.guestfs-0/appliance.d.mno21beq/initrd' supermin: ext2: wrote 1 modules to minimal initrd supermin: renaming /var/tmp/.guestfs-0/appliance.d.mno21beq to /var/tmp/.guestfs-0/appliance.d libguestfs: finished building supermin appliance libguestfs: trace: disk_create "/tmp/libguestfso7dtGK/overlay2.qcow2" "qcow2" -1 "backingfile:/var/tmp/.guestfs-0/appliance.d/root" "backingformat:raw" libguestfs: command: run: qemu-img libguestfs: command: run: \ create libguestfs: command: run: \ -f qcow2 libguestfs: command: run: \ -o backing_file=/var/tmp/.guestfs-0/appl...

...00011ms] finished building supermin appliance libguestfs: command: run: qemu-img libguestfs: command: run: \ create libguestfs: command: run: \ -f qcow2 libguestfs: command: run: \ -o backing_file=/var/tmp/.guestfs-0/appliance.d/root,backing_fmt=raw libguestfs: command: run: \ /tmp/libguestfsfJ31Qj/overlay2 Formatting '/tmp/libguestfsfJ31Qj/overlay2', fmt=qcow2 size=4294967296 backing_file='/var/tmp/.guestfs-0/appliance.d/root' backing_fmt='raw' encryption=off cluster_size=65536 lazy_refcounts=off libguestfs: set_socket_create_context: context_new failed: kernel: Invalid argume...

...guestfs: finished building supermin appliance libguestfs: command: run: qemu-img libguestfs: command: run: \ create libguestfs: command: run: \ -f qcow2 libguestfs: command: run: \ -o backing_file=/var/tmp/.guestfs-0/appliance.d/root,backing_fmt=raw libguestfs: command: run: \ /tmp/libguestfs1Sw4e2/overlay2 Formatting '/tmp/libguestfs1Sw4e2/overlay2', fmt=qcow2 size=4294967296 backing_file='/var/tmp/.guestfs-0/appliance.d/root' backing_fmt='raw' encryption=off cluster_size=65536 lazy_refcounts=off libguestfs: set_socket_create_context: getcon failed: (none): Invalid argument [y...