dstatでsnat netnsごとにトラフィックを見る奴

dstat_snat.py

class dstat_plugin(dstat):

    def __init__(self):
        self.nick = ('#recv', '#send')
        self.type = 'd'
        self.width = 5
        self.scale = 1024
        self.cols = 2

    def vars(self):
        import subprocess
        cmd = "ip netns | grep snat-"
        ret = subprocess.Popen(cmd, stdout=subprocess.PIPE, shell=True).stdout.readlines()
        return [str(x).rstrip("\n") for x in ret]

    def name(self):
        return [name[5:14] for name in self.vars]

    def extract(self):
        import subprocess
        for netns in self.vars:
                cmd = "ip netns exec %s cat /proc/net/dev" % netns
                for line in subprocess.Popen(cmd, stdout=subprocess.PIPE, shell=True).stdout.readlines():
                        l = line.split()
                        if len(l) < 17: continue
                        if l[1] == '0' and l[9] == '0': continue
                        self.set2[netns] = (long(l[1]), long(l[9]))
        if update:
            for name in self.set2:
                self.val[name] = map(lambda x, y: (y - x) * 1.0 / elapsed, self.set1[name], self.set2[name])
        if step == op.delay:
            self.set1.update(self.set2)