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--[[
LuCI LXC module
Copyright (C) 2014, Cisco Systems, Inc.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Author: Petar Koretic <petar.koretic@sartura.hr>
]]--
local uci = require "luci.model.uci"
local util = require "luci.util"
local nixio = require "nixio"
module("luci.controller.lxc", package.seeall)
function fork_exec(command)
local pid = nixio.fork()
if pid > 0 then
return
elseif pid == 0 then
-- change to root dir
nixio.chdir("/")
-- patch stdin, out, err to /dev/null
local null = nixio.open("/dev/null", "w+")
if null then
nixio.dup(null, nixio.stderr)
nixio.dup(null, nixio.stdout)
nixio.dup(null, nixio.stdin)
if null:fileno() > 2 then
null:close()
end
end
-- replace with target command
nixio.exec("/bin/sh", "-c", command)
end
end
function index()
page = node("admin", "services", "lxc")
page.target = cbi("lxc")
page.title = _("LXC Containers")
page.order = 70
page = entry({"admin", "services", "lxc_create"}, call("lxc_create"), nil)
page.leaf = true
page = entry({"admin", "services", "lxc_action"}, call("lxc_action"), nil)
page.leaf = true
page = entry({"admin", "services", "lxc_get_downloadable"}, call("lxc_get_downloadable"), nil)
page.leaf = true
page = entry({"admin", "services", "lxc_configuration_get"}, call("lxc_configuration_get"), nil)
page.leaf = true
page = entry({"admin", "services", "lxc_configuration_set"}, call("lxc_configuration_set"), nil)
page.leaf = true
end
function lxc_get_downloadable()
local target = lxc_get_arch_target()
local templates = {}
local f = io.popen('sh /usr/share/lxc/templates/lxc-download --list --no-validate --server %s'
% util.shellquote(uci.cursor():get("lxc", "lxc", "url")), 'r')
local line
for line in f:lines() do
local dist, version, dist_target = line:match("^(%S+)%s+(%S+)%s+(%S+)%s+default%s+%S+$")
if dist and version and dist_target == target then
templates[#templates+1] = "%s:%s" %{ dist, version }
end
end
f:close()
luci.http.prepare_content("application/json")
luci.http.write_json(templates)
end
function lxc_create(lxc_name, lxc_template)
luci.http.prepare_content("text/plain")
if not pcall(dofile, "/etc/openwrt_release") then
return luci.http.write("1")
end
local lxc_dist, lxc_release = lxc_template:match("^(.+):(.+)$")
luci.http.write(util.ubus("lxc", "create", {
name = lxc_name,
template = "download",
args = {
"--server", uci.cursor():get("lxc", "lxc", "url"),
"--no-validate",
"--dist", lxc_dist,
"--release", lxc_release,
"--arch", lxc_get_arch_target()
}
}))
end
function lxc_action(lxc_action, lxc_name)
local data, ec = util.ubus("lxc", lxc_action, lxc_name and { name = lxc_name } or {})
luci.http.prepare_content("application/json")
luci.http.write_json(ec and {} or data)
end
function lxc_get_config_path()
local f = io.open("/etc/lxc/lxc.conf", "r")
local content = f:read("*all")
f:close()
local ret = content:match('^%s*lxc.lxcpath%s*=%s*([^%s]*)')
if ret then
return ret .. "/"
else
return "/srv/lxc/"
end
end
function lxc_configuration_get(lxc_name)
luci.http.prepare_content("text/plain")
local f = io.open(lxc_get_config_path() .. lxc_name .. "/config", "r")
local content = f:read("*all")
f:close()
luci.http.write(content)
end
function lxc_configuration_set(lxc_name)
luci.http.prepare_content("text/plain")
local lxc_configuration = luci.http.formvalue("lxc_configuration")
if lxc_configuration == nil then
return luci.http.write("1")
end
local f, err = io.open(lxc_get_config_path() .. lxc_name .. "/config","w+")
if not f then
return luci.http.write("2")
end
f:write(lxc_configuration)
f:close()
luci.http.write("0")
end
function lxc_get_arch_target()
local target = nixio.uname().machine
local target_map {
armv5 = "armel",
armv6 = "armel",
armv7 = "armhf",
armv8 = "arm64",
x86_64 = "amd64"
}
local k, v
for k, v in pairs(target_map) do
if target:find(k) then
return v
end
end
return target
end
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