docker iotop :OSError: Netlink error: No such file or directory

来源：互联网发布：郑钧私奔知乎编辑：程序博客网时间：2024/05/20 21:58

在容器内使用iotop ，错误信息：

raceback (most recent call last):  File "/usr/sbin/iotop", line 16, in <module>    main()  File "/usr/lib/python2.6/site-packages/iotop/ui.py", line 559, in main    main_loop()  File "/usr/lib/python2.6/site-packages/iotop/ui.py", line 549, in <lambda>    main_loop = lambda: run_iotop(options)  File "/usr/lib/python2.6/site-packages/iotop/ui.py", line 447, in run_iotop    return curses.wrapper(run_iotop_window, options)  File "/usr/lib64/python2.6/curses/wrapper.py", line 43, in wrapper    return func(stdscr, *args, **kwds)  File "/usr/lib/python2.6/site-packages/iotop/ui.py", line 437, in run_iotop_window    taskstats_connection = TaskStatsNetlink(options)  File "/usr/lib/python2.6/site-packages/iotop/data.py", line 113, in __init__    self.family_id = controller.get_family_id('TASKSTATS')  File "/usr/lib/python2.6/site-packages/iotop/genetlink.py", line 54, in get_family_id    m = self.conn.recv()  File "/usr/lib/python2.6/site-packages/iotop/netlink.py", line 190, in recv    raise errOSError: Netlink error: No such file or directory (2)

iotop是通过内核的taskstats接口获取统计信息的。taskstats是基于generic netlink实现的，而且taskstats不支持net namespace。

static struct genl_family family = {.id= GENL_ID_GENERATE,.name= TASKSTATS_GENL_NAME,.version= TASKSTATS_GENL_VERSION,.maxattr= TASKSTATS_CMD_ATTR_MAX,};static int ctrl_dumpfamily(struct sk_buff *skb, struct netlink_callback *cb){ int i, n = 0; struct genl_family *rt; struct net *net = sock_net(skb->sk); int chains_to_skip = cb->args[0]; int fams_to_skip = cb->args[1]; for (i = chains_to_skip; i < GENL_FAM_TAB_SIZE; i++) {  n = 0;  list_for_each_entry(rt, genl_family_chain(i), family_list) {   if (!rt->netnsok && !net_eq(net, &init_net))///don't support netnamespace    continue;

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