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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)
local uci = require "luci.model.uci".cursor()
local util = require "luci.util"
local nx = require "nixio"
local url = util.shellquote(uci:get("lxc", "lxc", "url"))
function index()
if not nixio.fs.access("/etc/config/lxc") then
return
end
page = node("admin", "services", "lxc")
page.target = cbi("lxc")
page.title = _("LXC Containers")
page.order = 70
entry({"admin", "services", "lxc_create"}, call("lxc_create"), nil).leaf = true
entry({"admin", "services", "lxc_action"}, call("lxc_action"), nil).leaf = true
entry({"admin", "services", "lxc_get_downloadable"}, call("lxc_get_downloadable"), nil).leaf = true
entry({"admin", "services", "lxc_configuration_get"}, call("lxc_configuration_get"), nil).leaf = true
entry({"admin", "services", "lxc_configuration_set"}, call("lxc_configuration_set"), nil).leaf = true
end
function lxc_get_downloadable()
local target = lxc_get_arch_target(url)
local ssl_status = lxc_get_ssl_status()
local templates = {}
local f = io.popen('sh /usr/share/lxc/templates/lxc-download --list %s --server %s 2>/dev/null'
%{ ssl_status, 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+$")
if dist and version and dist_target and dist_target == target then
templates[#templates+1] = "%s:%s" %{ dist, version }
end
end
f:close()
luci.http.prepare_content("application/json")
luci.http.write_json(templates)
end
function lxc_create(lxc_name, lxc_template)
luci.http.prepare_content("text/plain")
local path = lxc_get_config_path()
if not path then
return
end
local ssl_status = lxc_get_ssl_status()
local lxc_dist, lxc_release = lxc_template:match("^(.+):(.+)$")
luci.sys.call('/usr/bin/lxc-create --quiet --name %s --bdev best --template download -- --dist %s --release %s --arch %s --server %s %s'
%{ lxc_name, lxc_dist, lxc_release, lxc_get_arch_target(url), url, ssl_status })
while (nx.fs.access(path .. lxc_name .. "/partial")) do
nx.nanosleep(1)
end
luci.http.write("0")
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
if nx.fs.access(ret) then
local min_space = tonumber(uci:get("lxc", "lxc", "min_space")) or 100000
local free_space = tonumber(util.exec("df " ..ret.. " | awk '{if(NR==2)print $4}'"))
if free_space and free_space >= min_space then
local min_temp = tonumber(uci:get("lxc", "lxc", "min_temp")) or 100000
local free_temp = tonumber(util.exec("df /tmp | awk '{if(NR==2)print $4}'"))
if free_temp and free_temp >= min_temp then
return ret .. "/"
else
util.perror("lxc error: not enough temporary space (< " ..min_temp.. " KB)")
end
else
util.perror("lxc error: not enough space (< " ..min_space.. " KB)")
end
else
util.perror("lxc error: directory not found")
end
else
util.perror("lxc error: config path is empty")
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_conf")
if lxc_configuration == nil then
util.perror("lxc error: config formvalue is empty")
return
end
local f, err = io.open(lxc_get_config_path() .. lxc_name .. "/config","w+")
if not f then
util.perror("lxc error: config file not found")
return
end
f:write(lxc_configuration)
f:close()
luci.http.write("0")
end
function lxc_get_arch_target(url)
local target = nx.uname().machine
if url and url:match("images.linuxcontainers.org") then
local target_map = {
armv5 = "armel",
armv6 = "armel",
armv7 = "armhf",
armv8 = "arm64",
i686 = "i386",
x86_64 = "amd64"
}
local k, v
for k, v in pairs(target_map) do
if target:find(k) then
return v
end
end
end
return target
end
function lxc_get_ssl_status()
local ssl_enabled = uci:get("lxc", "lxc", "ssl_enabled")
local ssl_status = "--no-validate"
if ssl_enabled and ssl_enabled == "1" then
ssl_status = ""
end
return ssl_status
end
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