132 lines
4 KiB
Go
132 lines
4 KiB
Go
package docker
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import (
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"text/template"
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)
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const LxcTemplate = `
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# hostname
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{{if .Config.Hostname}}
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lxc.utsname = {{.Config.Hostname}}
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{{else}}
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lxc.utsname = {{.Id}}
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{{end}}
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#lxc.aa_profile = unconfined
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# network configuration
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lxc.network.type = veth
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lxc.network.flags = up
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lxc.network.link = {{.NetworkSettings.Bridge}}
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lxc.network.name = eth0
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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
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# available)
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lxc.pts = 1024
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# disable the main console
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lxc.console = none
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# no controlling tty at all
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lxc.tty = 1
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# no implicit access to devices
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lxc.cgroup.devices.deny = a
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# /dev/null and zero
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lxc.cgroup.devices.allow = c 1:3 rwm
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lxc.cgroup.devices.allow = c 1:5 rwm
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# consoles
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lxc.cgroup.devices.allow = c 5:1 rwm
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lxc.cgroup.devices.allow = c 5:0 rwm
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lxc.cgroup.devices.allow = c 4:0 rwm
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lxc.cgroup.devices.allow = c 4:1 rwm
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# /dev/urandom,/dev/random
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lxc.cgroup.devices.allow = c 1:9 rwm
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lxc.cgroup.devices.allow = c 1:8 rwm
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# /dev/pts/* - pts namespaces are "coming soon"
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lxc.cgroup.devices.allow = c 136:* rwm
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lxc.cgroup.devices.allow = c 5:2 rwm
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# tuntap
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lxc.cgroup.devices.allow = c 10:200 rwm
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# fuse
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#lxc.cgroup.devices.allow = c 10:229 rwm
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# rtc
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#lxc.cgroup.devices.allow = c 254:0 rwm
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# standard mount point
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# WARNING: procfs is a known attack vector and should probably be disabled
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# if your userspace allows it. eg. see http://blog.zx2c4.com/749
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lxc.mount.entry = proc {{$ROOTFS}}/proc proc nosuid,nodev,noexec 0 0
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# WARNING: sysfs is a known attack vector and should probably be disabled
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# if your userspace allows it. eg. see http://bit.ly/T9CkqJ
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lxc.mount.entry = sysfs {{$ROOTFS}}/sys sysfs nosuid,nodev,noexec 0 0
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lxc.mount.entry = devpts {{$ROOTFS}}/dev/pts devpts newinstance,ptmxmode=0666,nosuid,noexec 0 0
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#lxc.mount.entry = varrun {{$ROOTFS}}/var/run tmpfs mode=755,size=4096k,nosuid,nodev,noexec 0 0
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#lxc.mount.entry = varlock {{$ROOTFS}}/var/lock tmpfs size=1024k,nosuid,nodev,noexec 0 0
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#lxc.mount.entry = shm {{$ROOTFS}}/dev/shm tmpfs size=65536k,nosuid,nodev,noexec 0 0
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# Inject docker-init
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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}}
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{{ $rw := .VolumesRW }}
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{{range $virtualPath, $realPath := .Volumes}}
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lxc.mount.entry = {{$realPath}} {{$ROOTFS}}/{{$virtualPath}} none bind,{{ if index $rw $virtualPath }}rw{{else}}ro{{end}} 0 0
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{{end}}
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{{end}}
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# drop linux capabilities (apply mainly to the user root in the container)
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# (Note: 'lxc.cap.keep' is coming soon and should replace this under the
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# security principle 'deny all unless explicitly permitted', see
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# http://sourceforge.net/mailarchive/message.php?msg_id=31054627 )
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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}}
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lxc.cgroup.memory.limit_in_bytes = {{.Config.Memory}}
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lxc.cgroup.memory.soft_limit_in_bytes = {{.Config.Memory}}
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{{with $memSwap := getMemorySwap .Config}}
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lxc.cgroup.memory.memsw.limit_in_bytes = {{$memSwap}}
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{{end}}
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{{end}}
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{{if .Config.CpuShares}}
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lxc.cgroup.cpu.shares = {{.Config.CpuShares}}
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{{end}}
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`
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var LxcTemplateCompiled *template.Template
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func getMemorySwap(config *Config) int64 {
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// By default, MemorySwap is set to twice the size of RAM.
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// If you want to omit MemorySwap, set it to `-1'.
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if config.MemorySwap < 0 {
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return 0
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}
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return config.Memory * 2
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}
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func init() {
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var err error
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funcMap := template.FuncMap{
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"getMemorySwap": getMemorySwap,
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}
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LxcTemplateCompiled, err = template.New("lxc").Funcs(funcMap).Parse(LxcTemplate)
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if err != nil {
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panic(err)
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}
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}
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