From c20bd8d489c45401db55cf89bf7d4d0f7623a4fe Mon Sep 17 00:00:00 2001

From: Jan Jansky <jjansky@redhat.com>

Date: Thu, 6 Feb 2020 08:56:11 +0100

Subject: [PATCH] [networking] options to limit namespaces

* Added posibility to define namespaces with

parameter namespaces = "". Posible regexp

like "eth* ens4".

* Added inspect_namespaces which defines how

many namespaces should be inspected, by

default unlimited

* Added ethtool_namespaces variable which

is by default true and if set to false it

will not execute ethtool commands for

namespaces

* Changed options for OpenStack environment

where ethtool_namespaces=False and

inspect_namespaces = 200

Closes: #1916

Signed-off-by: Jan Jansky <jjansky@redhat.com>

Signed-off-by: Pavel Moravec <pmoravec@redhat.com>

---

--- a/sos/plugins/networking.py

+++ b/sos/plugins/networking.py

@@ -9,7 +9,7 @@

 from sos.plugins import (Plugin, RedHatPlugin, UbuntuPlugin, DebianPlugin,

                          SoSPredicate)

 from os import listdir

-import re

+from re import match

 class Networking(Plugin):

@@ -18,10 +18,17 @@

     plugin_name = "networking"

     profiles = ('network', 'hardware', 'system')

     trace_host = "www.example.com"

-    option_list = [(

+    option_list = [

         ("traceroute", "collect a traceroute to %s" % trace_host, "slow",

-         False)

-    )]

+         False),

+        ("namespace_pattern", "Specific namespaces pattern to be " +

+         "collected, namespaces pattern should be separated by whitespace " +

+         "as for example \"eth* ens2\"", "fast", ""),

+        ("namespaces", "Number of namespaces to collect, 0 for unlimited. " +

+         "Incompatible with the namespace_pattern plugin option", "slow", 0),

+        ("ethtool_namespaces", "Define if ethtool commands should be " +

+         "collected for namespaces", "slow", True)

+    ]

     # switch to enable netstat "wide" (non-truncated) output mode

     ns_wide = "-W"

@@ -209,8 +216,41 @@

         # per-namespace.

         ip_netns_file = self.get_cmd_output_now("ip netns")

         cmd_prefix = "ip netns exec "

+        # Regex initialization outside of for loop

         if ip_netns_file:

-            for namespace in self.get_ip_netns(ip_netns_file):

+            if self.get_option("namespace_pattern"):

+                pattern = '(?:%s$)' % '$|'.join(

+                        self.get_option("namespace_pattern").split()

+                        ).replace('*', '.*')

+            out_ns = []

+            with open(ip_netns_file, 'r') as file:

+                ip_netns = file.read()

+            for line in ip_netns.splitlines():

+                # If there's no namespaces, no need to continue

+                if line.startswith("Object \"netns\" is unknown") \

+                        or line.isspace() \

+                        or line[:1].isspace():

+                    continue

+

+                # if namespace_pattern defined, append only namespaces

+                # matching with pattern

+                if self.get_option("namespace_pattern"):

+                    if bool(match(pattern, line)):

+                        out_ns.append(line.partition(' ')[0])

+

+                # if namespaces is defined and namespace_pattern is not defined

+                # remove from out_ns namespaces with higher index than defined

+                elif self.get_option("namespaces") != 0:

+                    out_ns.append(line.partition(' ')[0])

+                    if len(out_ns) == self.get_option("namespaces"):

+                        self._log_warn("Limiting namespace iteration " +

+                                   "to first %s namespaces found"

+                                   % self.get_option("namespaces"))

+                        break

+                else:

+                    out_ns.append(line.partition(' ')[0])

+

+            for namespace in out_ns:

                 ns_cmd_prefix = cmd_prefix + namespace + " "

                 self.add_cmd_output([

                     ns_cmd_prefix + "ip address show",

@@ -227,24 +267,27 @@

                 # check for it

                 self.add_cmd_output(ss_cmd, pred=ss_pred)

-            # Devices that exist in a namespace use less ethtool

-            # parameters. Run this per namespace.

-            for namespace in self.get_ip_netns(ip_netns_file):

-                ns_cmd_prefix = cmd_prefix + namespace + " "

-                netns_netdev_list = self.call_ext_prog(ns_cmd_prefix +

+            # Collect ethtool commands only when ethtool_namespaces

+            # is set to true.

+            if self.get_option("ethtool_namespaces"):

+                # Devices that exist in a namespace use less ethtool

+                # parameters. Run this per namespace.

+                for namespace in out_ns:

+                    ns_cmd_prefix = cmd_prefix + namespace + " "

+                    netns_netdev_list = self.call_ext_prog(ns_cmd_prefix +

                                                        "ls -1 /sys/class/net/")

-                for eth in netns_netdev_list['output'].splitlines():

-                    # skip 'bonding_masters' file created when loading the

-                    # bonding module but the file does not correspond to

-                    # a device

-                    if eth == "bonding_masters":

-                        continue

-                    self.add_cmd_output([

-                        ns_cmd_prefix + "ethtool " + eth,

-                        ns_cmd_prefix + "ethtool -i " + eth,

-                        ns_cmd_prefix + "ethtool -k " + eth,

-                        ns_cmd_prefix + "ethtool -S " + eth

-                    ])

+                    for eth in netns_netdev_list['output'].splitlines():

+                        # skip 'bonding_masters' file created when loading the

+                        # bonding module but the file does not correspond to

+                        # a device

+                        if eth == "bonding_masters":

+                            continue

+                        self.add_cmd_output([

+                            ns_cmd_prefix + "ethtool " + eth,

+                            ns_cmd_prefix + "ethtool -i " + eth,

+                            ns_cmd_prefix + "ethtool -k " + eth,

+                            ns_cmd_prefix + "ethtool -S " + eth

+                        ])

         return

--- a/sos/policies/redhat.py

+++ b/sos/policies/redhat.py

@@ -174,8 +174,6 @@

 _opts_verify = SoSOptions(verify=True)

 _opts_all_logs = SoSOptions(all_logs=True)

 _opts_all_logs_verify = SoSOptions(all_logs=True, verify=True)

-_opts_all_logs_no_lsof = SoSOptions(all_logs=True,

-                                    plugopts=['process.lsof=off'])

 _cb_plugs = ['abrt', 'block', 'boot', 'dnf', 'dracut', 'filesys', 'grub2',

              'hardware', 'host', 'kernel', 'logs', 'lvm2', 'memory', 'rpm',

              'process', 'systemd', 'yum', 'xfs']

@@ -190,6 +188,10 @@

 RHOSP = "rhosp"

 RHOSP_DESC = "Red Hat OpenStack Platform"

+RHOSP_OPTS = SoSOptions(plugopts=[

+                             'process.lsof=off',

+                             'networking.ethtool_namespaces=False',

+                             'networking.namespaces=200'])

 RHOCP = "ocp"

 RHOCP_DESC = "OpenShift Container Platform by Red Hat"

@@ -211,8 +213,7 @@

     RHV: PresetDefaults(name=RHV, desc=RHV_DESC, note=NOTE_TIME,

                         opts=_opts_verify),

     RHEL: PresetDefaults(name=RHEL, desc=RHEL_DESC),

-    RHOSP: PresetDefaults(name=RHOSP, desc=RHOSP_DESC, note=NOTE_SIZE,

-                          opts=_opts_all_logs_no_lsof),

+    RHOSP: PresetDefaults(name=RHOSP, desc=RHOSP_DESC, opts=RHOSP_OPTS),

     RHOCP: PresetDefaults(name=RHOCP, desc=RHOCP_DESC, note=NOTE_SIZE_TIME,

                           opts=_opts_all_logs_verify),

     RH_SATELLITE: PresetDefaults(name=RH_SATELLITE, desc=RH_SATELLITE_DESC,