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docs:lxc
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docs:lxc [2013-11-19 23:52] glen [config for network] use xensource mac prefix 00:16:3e |
docs:lxc [2013-12-09 15:33] glen load iptables from hook |
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| Build the guest container. | Build the guest container. | ||
| + | |||
| ==== Bare minimum, no template ==== | ==== Bare minimum, no template ==== | ||
| Line 62: | Line 63: | ||
| !!! WARNING: pld template for LXC is yet to be written !!! | !!! WARNING: pld template for LXC is yet to be written !!! | ||
| + | ===== Common problems / Useful tricks ===== | ||
| + | |||
| + | ==== lxc-stop is not graceful ==== | ||
| + | |||
| + | Currently ''lxc-stop -n test'' sends ''SIGPWR'' to init inside container, but ''rc-scripts'' fails to shutdown things properly (shutdown scripts are not invoked). For workaround, stop services manually before issueing ''lxc-stop'' or run ''poweroff''/''halt''/''reboot'' from container. | ||
| + | |||
| + | Details: In process table is only this process runrning, no further actions from ''rc-scripts'': | ||
| + | <file> | ||
| + | /sbin/shutdown -f -h +2 Power Failure; System Shutting Down | ||
| + | </file> | ||
| + | |||
| + | ==== loginuid ==== | ||
| + | |||
| + | having ''audit_control'' dropped: | ||
| + | <file config config> | ||
| + | lxc.cap.drop = audit_control | ||
| + | </file> | ||
| + | |||
| + | ''pam_loginuid.so'' does not allow ''sshd'' to login: | ||
| + | <file> | ||
| + | Nov 24 16:02:10 test sshd[2694]: error: PAM: pam_open_session(): Cannot make/remove an entry for the specified session | ||
| + | </file> | ||
| + | |||
| + | You can either [[http://kb.parallels.com/en/112597|workaround]] to disable ''pam_loginuid.so'' in the authentication rules: | ||
| + | <file> | ||
| + | # sed '/pam_loginuid.so/s/^/#/g' -i /etc/pam.d/* | ||
| + | </file> | ||
| + | |||
| + | Or just **do not** drop the capability. | ||
| ===== Vserver comparision ===== | ===== Vserver comparision ===== | ||
| Line 87: | Line 117: | ||
| - you can't filter it from host's firewall | - you can't filter it from host's firewall | ||
| - you HAVE to set mac. If not - on every container start you'll have different one (your router will not pass the traffic). | - you HAVE to set mac. If not - on every container start you'll have different one (your router will not pass the traffic). | ||
| + | - iptables is initialized from lxc.hook.pre-mount hook (ran in the container's namespace and having macvlan interface visible) | ||
| + | |||
| first boot with ''hwaddr'' line disabled, look what the random address was assigned, set it in config. | first boot with ''hwaddr'' line disabled, look what the random address was assigned, set it in config. | ||
| Line 105: | Line 137: | ||
| lxc.network.ipv4 = 192.168.2.160/23 | lxc.network.ipv4 = 192.168.2.160/23 | ||
| lxc.network.ipv4.gateway = 192.168.2.1 | lxc.network.ipv4.gateway = 192.168.2.1 | ||
| + | |||
| + | lxc.hook.pre-mount = /sbin/service iptables start | ||
| + | lxc.cap.drop = net_admin | ||
| </file> | </file> | ||
docs/lxc.txt ยท Last modified: 2016-08-21 00:36 by glen
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