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| − | {{DISPLAYTITLE: vzctl for upstream kernel}}
| + | Dear Glauber, |
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| − | '''This article describes using OpenVZ tool vzctl as an alternative to LXC tools.'''
| + | Please fill it in. |
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| − | Recent vzctl releases (starting from version 4.0) can be used with upstream (non-OpenVZ) Linux kernels (that essentially means any recent 3.x kernel). At the moment, it provides just basic functionality.
| + | Regards, |
| − | It is currently possible to create, start and stop a container with the same steps as one would use for a normal OpenVZ container. Other features may be present with limited functionality, while some are not present at all. We appreciate all bug reports, please file to [http://bugzilla.openvz.org/enter_bug.cgi?component=vzctl bugzilla].
| + | --[[User:Kir|Kir]] 10:01, 10 August 2012 (EDT) |
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| − | Running vzctl on upstream kernels is considered an experimental feature. See [[#Limitations]] below.
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| − | == Installation ==
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| − | {{Note|This section describes installation for RPM-based distros. See [[#Building]] below if you want to compile vzctl from source.}}
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| − | First, set up OpenVZ yum repository. Download [[download:openvz.repo|openvz.repo]] file and put it to your <code>/etc/yum.repos.d/</code> repository,
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| − | and import OpenVZ GPG key used for signing RPM packages. This can be achieved by the following commands, as root:
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| − | <pre><nowiki>
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| − | wget -P /etc/yum.repos.d/ http://download.openvz.org/openvz.repo
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| − | rpm --import http://download.openvz.org/RPM-GPG-Key-OpenVZ
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| − | </nowiki></pre>
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| − | In case you can not cd to /etc/yum.repos.d, it means either yum is not installed on your system, or yum version is too old.
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| − | Then, install vzctl-core package:
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| − | yum install vzctl-core
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| − | | |
| − | == Usage ==
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| − | For supported features, usage is expected to be the same as standard vzctl tool. See {{man|vzctl|8}} for more information.
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| − | | |
| − | === Networking ===
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| − | {{Note|IP mode networking (--ipadd / --ipdel) is currently not supported}}
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| − | Networking is available through the switches <code>--netdev_add</code>, <code>--netif_add</code>, and their respective deletion counterparts.
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| − | Unfortunately now it requires some manual configuration.
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| − | | |
| − | == Bridged networking ==
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| − | The following example assumes
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| − | * you already have a bridge configured on the host system
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| − | * bridge interface name is virbr0
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| − | * CT is running Red Hat like distro (CentOS)
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| − | | |
| − | vzctl set $CTID --netif_add eth0,,,,virbr0 --save
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| − | echo "NETWORKING=yes" > /vz/private/$CTID/etc/sysconfig/network
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| − | | |
| − | cat << EOF > /vz/private/$CTID/etc/sysconfig/network-scripts/ifcfg-eth0 | |
| − | DEVICE=eth0
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| − | BOOTPROTO=dhcp
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| − | ONBOOT=yes
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| − | EOF
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| − | | |
| − | vzctl start $CTID
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| − | | |
| − | After this, you can find CT IP using this:
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| − | # ip netns exec $CTID ip address list
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| − | | |
| − | == Limitations ==
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| − | | |
| − | {{Note|We recommend using [[Download/kernel/rhel6|OpenVZ kernel]] for features, stability and security}}
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| − | The following vzctl commands are not working at all with the non-OpenVZ kernel:
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| − | * <code>quotaon</code>/<code>quotaoff</code>/<code>quotainit</code> (vzquota-specific)
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| − | * <code>convert</code>, <code>compact</code>, <code>snapshot*</code> (ploop-specific)
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| − | * <code>console</code> (needs a virtual /dev/console, /dev/ttyN device)
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| − | * <code>chkpnt</code>, <code>restore</code> (currently need OpenVZ-kernel-specific checkpointing, [http://criu.org/ CRIU] will be supported later)
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| − | | |
| − | The following binaries are not ported to work on top of upstream kernel:
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| − | * vzlist
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| − | * vzcalc
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| − | * vzcfgvalidate
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| − | * vzcpucheck
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| − | * vzmemcheck
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| − | * vzmigrate
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| − | * vzeventd
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| − | * vzpid
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| − | * vzsplit
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| − | * vzubc
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| − | | |
| − | === /proc and /sys ===
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| − | Software that depend on information supplied by the proc filesystem may not work correctly, since there is not a full solution for full /proc virtualization. For instance, /proc/stat is not yet virtualized, and top will show distorted values.
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| − | | |
| − | === Resource management ===
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| − | With non-OpenVZ kernel, setting resources like <code>--ram</code> and <code>--cpuunits</code> works, but there their effect is dependent on what the current kernel supports, through the cgroups subsystem. When a particular cgroup file is present, it will be used. Currently, vzctl will search for the following files:
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| − | * cpu.cfs_quota_us
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| − | * cpu.shares
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| − | * cpuset.cpus
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| − | * memory.limit_in_bytes
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| − | * memory.memsw.limit_in_bytes
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| − | * memory.kmem.limit_in_bytes
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| − | * memory.kmem.tcp.limit_in_bytes
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| − | | |
| − | == Building ==
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| − | | |
| − | In case you don't want to use packages provided by OpenVZ (available from [[Download/vzctl]]), but rather would like to compile vzctl from sources, read on.
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| − | | |
| − | === Dependencies ===
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| − | The following software needs to be installed on your system:
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| − | * iproute2 >= 3.0.0 (runtime only)
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| − | * libcgroup >= 0.38
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| − | | |
| − | === Download ===
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| − | You can get the latest released version from [[Download/vzctl/{{Latest vzctl}}#sources]] or directly from [[download:utils/vzctl/current/src/]].
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| − | | |
| − | If you are living on the bleeding edge, get vzctl sources from git. Then run autogen.sh to recreate auto* files:
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| − | git clone <nowiki>https://src.openvz.org/scm/ovzl/vzctl.git</nowiki>
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| − | cd vzctl
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| − | ./autogen.sh
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| − | | |
| − | === Compile ===
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| − | Usual <code>./configure && make</code> should do. But you probably want to specify more options. It makes sense to:
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| − | * enable cgroup support
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| − | * add <code>--without-ploop</code> (unless you want [[ploop]] compiled it) because otherwise you will need ploop lib headers (available from [[Download/ploop]]).
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| − | * enable bash completion support
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| − | * set prefix to /usr
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| − | | |
| − | See <code>./configure --help</code> output for more details and options available.
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| − | | |
| − | So, the command will look like:
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| − | $ ./configure --with-cgroup --without-ploop --enable-bashcomp --prefix=/usr
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| − | $ make -j4
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| − | | |
| − | === Install ===
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| − | # make install
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| − | vzctl is also bundled in some Linux distributions, so you can install vzctl using native distro tools (i.e. your package manager):
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| − | * vzctl in [https://launchpad.net/ubuntu/+source/vzctl Ubuntu Linux] [https://help.ubuntu.com/community/OpenVZ Description]
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| − | * vzctl-core in [https://apps.fedoraproject.org/packages/vzctl-core Fedora Linux] [https://fedoraproject.org/wiki/QA:Testcase_vzctl_base Description]
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| − | * sys-cluster/vzctl in [http://packages.gentoo.org/package/sys-cluster/vzctl Gentoo Linux]
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| − | * vzctl in [https://packages.debian.org/search?keywords=vzctl Debian Linux]
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| − | * vzctl in [http://packages.altlinux.org/vzctl ALT Linux] ([http://altlinux.org/OpenVZ description])
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| − | | |
| − | == Known issues and workarounds ==
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| − | | |
| − | === A container doesn't boot and udevd is in a process list ===
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| − | udev doesn't work, because <code>uevent</code>s are not virtualized yet. If you don't know how to disable it, you can remove the udev package.
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| − | | |
| − | === <code>vzctl enter</code> doesn't work ===
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| − | You see this when trying to use <code>vzctl enter</code>:
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| − | Unable to open pty: No such file or directory
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| − | If a CT is executed in a user namespace, devpts must be mounted with the newinstance option. You can add this option in container's <code>/etc/fstab</code> file.
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| − | == See also ==
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| − | * [[OpenVZ with upstream kernel]]
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