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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>
]]--
module("luci.controller.lxc", package.seeall)
require "ubus"
local conn = ubus.connect()
if not conn then
error("Failed to connect to ubus")
end
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()
luci.http.prepare_content("application/json")
local f = io.popen('uname -m', 'r')
local target = f:read('*a')
f:close()
target = target:gsub("^%s*(.-)%s*$", "%1")
local templates = {}
local f = io.popen('lxc-create -n just_want_to_list_available_lxc_templates -t download -- --list', 'r')
for line in f:lines() do
local dist,version = line:match("^(%S+)%s+(%S+)%s+" .. target .. "%s+default%s+%S+$")
if dist~=nil and version~=nil then templates[#templates + 1] = dist .. ":" .. version end
end
f:close()
luci.http.write_json(templates)
end
function lxc_create(lxc_name, lxc_template)
luci.http.prepare_content("text/plain")
local uci = require("uci").cursor()
local url = uci:get("lxc", "lxc", "url")
if not pcall(dofile, "/etc/openwrt_release") then
return luci.http.write("1")
end
local f = io.popen('uname -m', 'r')
local target = f:read('*a')
f:close()
target = target:gsub("^%s*(.-)%s*$", "%1")
local lxc_dist = lxc_template:gsub("(.*):(.*)", '%1')
local lxc_release = lxc_template:gsub("(.*):(.*)", '%2')
local data = conn:call("lxc", "create", { name = lxc_name, template = "download", args = { "--server", url, "--no-validate", "--dist", lxc_dist, "--release", lxc_release, "--arch", target } } )
luci.http.write(data)
end
function lxc_action(lxc_action, lxc_name)
luci.http.prepare_content("application/json")
local data, ec = conn:call("lxc", lxc_action, lxc_name and { name = lxc_name} or {} )
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
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