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package docker
import (
"text/template"
)
const LxcTemplate = `
# hostname
{{if .Config.Hostname}}
lxc.utsname = {{.Config.Hostname}}
{{else}} |
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lxc.utsname = {{.Id}} |
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{{end}}
#lxc.aa_profile = unconfined
# network configuration |
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lxc.network.type = veth
lxc.network.flags = up |
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lxc.network.link = {{.NetworkSettings.Bridge}} |
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lxc.network.name = eth0
lxc.network.mtu = 1500 |
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lxc.network.ipv4 = {{.NetworkSettings.IPAddress}}/{{.NetworkSettings.IPPrefixLen}} |
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# root filesystem |
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{{$ROOTFS := .RootfsPath}} |
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lxc.rootfs = {{$ROOTFS}} |
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# use a dedicated pts for the container (and limit the number of pseudo terminal
# available)
lxc.pts = 1024
# disable the main console
lxc.console = none
# no controlling tty at all
lxc.tty = 1
# no implicit access to devices
lxc.cgroup.devices.deny = a
# /dev/null and zero
lxc.cgroup.devices.allow = c 1:3 rwm
lxc.cgroup.devices.allow = c 1:5 rwm
# consoles
lxc.cgroup.devices.allow = c 5:1 rwm
lxc.cgroup.devices.allow = c 5:0 rwm
lxc.cgroup.devices.allow = c 4:0 rwm
lxc.cgroup.devices.allow = c 4:1 rwm
# /dev/urandom,/dev/random
lxc.cgroup.devices.allow = c 1:9 rwm
lxc.cgroup.devices.allow = c 1:8 rwm
# /dev/pts/* - pts namespaces are "coming soon"
lxc.cgroup.devices.allow = c 136:* rwm
lxc.cgroup.devices.allow = c 5:2 rwm
# tuntap
lxc.cgroup.devices.allow = c 10:200 rwm
# fuse
#lxc.cgroup.devices.allow = c 10:229 rwm
# rtc
#lxc.cgroup.devices.allow = c 254:0 rwm
# standard mount point |
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lxc.mount.entry = proc {{$ROOTFS}}/proc proc nosuid,nodev,noexec 0 0
lxc.mount.entry = sysfs {{$ROOTFS}}/sys sysfs nosuid,nodev,noexec 0 0
lxc.mount.entry = devpts {{$ROOTFS}}/dev/pts devpts newinstance,ptmxmode=0666,nosuid,noexec 0 0
#lxc.mount.entry = varrun {{$ROOTFS}}/var/run tmpfs mode=755,size=4096k,nosuid,nodev,noexec 0 0
#lxc.mount.entry = varlock {{$ROOTFS}}/var/lock tmpfs size=1024k,nosuid,nodev,noexec 0 0
#lxc.mount.entry = shm {{$ROOTFS}}/dev/shm tmpfs size=65536k,nosuid,nodev,noexec 0 0 |
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|
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# Inject docker-init
lxc.mount.entry = {{.SysInitPath}} {{$ROOTFS}}/sbin/init none bind,ro 0 0
|
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# In order to get a working DNS environment, mount bind (ro) the host's /etc/resolv.conf into the container |
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lxc.mount.entry = {{.ResolvConfPath}} {{$ROOTFS}}/etc/resolv.conf none bind,ro 0 0 |
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{{if .Volumes}}
{{range $virtualPath, $realPath := .GetVolumes}}
lxc.mount.entry = {{$realPath}} {{$ROOTFS}}/{{$virtualPath}} none bind,rw 0 0 |
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{{end}}
{{end}} |
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# drop linux capabilities (apply mainly to the user root in the container) |
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lxc.cap.drop = audit_control audit_write mac_admin mac_override mknod setfcap setpcap sys_admin sys_boot sys_module sys_nice sys_pacct sys_rawio sys_resource sys_time sys_tty_config |
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# limits |
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{{if .Config.Memory}}
lxc.cgroup.memory.limit_in_bytes = {{.Config.Memory}}
lxc.cgroup.memory.soft_limit_in_bytes = {{.Config.Memory}} |
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{{with $memSwap := getMemorySwap .Config}}
lxc.cgroup.memory.memsw.limit_in_bytes = {{$memSwap}} |
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{{end}} |
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{{end}} |
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{{if .Config.CpuShares}}
lxc.cgroup.cpu.shares = {{.Config.CpuShares}}
{{end}} |
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`
var LxcTemplateCompiled *template.Template
|
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func getMemorySwap(config *Config) int64 {
// By default, MemorySwap is set to twice the size of RAM.
// If you want to omit MemorySwap, set it to `-1'.
if config.MemorySwap < 0 { |
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return 0
} |
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return config.Memory * 2 |
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}
|
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func init() {
var err error |
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funcMap := template.FuncMap{ |
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"getMemorySwap": getMemorySwap, |
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}
LxcTemplateCompiled, err = template.New("lxc").Funcs(funcMap).Parse(LxcTemplate) |
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if err != nil {
panic(err)
}
} |