luci-app-lxc: initial commit

Moved over here from the packages repository.

Signed-off-by: Dan Luedtke <mail@danrl.com>

1 files changed, 167 insertions, 0 deletions

diff --git a/applications/luci-app-lxc/luasrc/controller/lxc.lua b/applications/luci-app-lxc/luasrc/controller/lxc.lua
new file mode 100644
index 0000000000..ea7adbafbb
--- /dev/null
+++ b/applications/luci-app-lxc/luasrc/controller/lxc.lua
@@ -0,0 +1,167 @@
+--[[
+
+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
+