--[[ 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", aarch64 = "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