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reduce CPU usage by doing netflow samping in iptables

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FAELIX SALT 2020-03-30 08:56:27 +00:00
parent 1488e40075
commit b6d01c8683
3 changed files with 5 additions and 5 deletions
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4
bcp38.iptables.v4
View File

@ -27,13 +27,13 @@ COMMIT
*mangle
:PREROUTING ACCEPT [0:0]
{% for iface_name, iface_data in pillar['netbox']['interfaces'].items() %}{% if salt['pillar.get']('interfaces:'+iface_name+':netflow') %}
-A PREROUTING -i {{ iface_name }} -j NFLOG --nflog-group 2 --nflog-size 64 --nflog-threshold 64
-A PREROUTING -i {{ iface_name }} -m statistic --mode nth --packet 1 --every {{ salt['pillar.get']('netflow:sampling-rate',64) }} -j NFLOG --nflog-group 2 {% if salt['grains.get']('kernelrelease','') in ["4.19.52-amd64-vyos","4.19.84-amd64-vyos"] %}--nflog-range 64{% else %}--nflog-size 64{% endif %} --nflog-threshold 64
{% endif %}{% endfor %}
:INPUT ACCEPT [0:0]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [0:0]
:POSTROUTING ACCEPT [0:0]
{% for iface_name, iface_data in pillar['netbox']['interfaces'].items() %}{% if salt['pillar.get']('interfaces:'+iface_name+':netflow') %}
-A POSTROUTING -o {{ iface_name }} -j NFLOG --nflog-group 2 --nflog-size 64 --nflog-threshold 64
-A POSTROUTING -o {{ iface_name }} -m statistic --mode nth --packet 1 --every {{ salt['pillar.get']('netflow:sampling-rate',64) }} -j NFLOG --nflog-group 2 {% if salt['grains.get']('kernelrelease','') in ["4.19.52-amd64-vyos","4.19.84-amd64-vyos"] %}--nflog-range 64{% else %}--nflog-size 64{% endif %} --nflog-threshold 64
{% endif %}{% endfor %}
COMMIT

4
bcp38.iptables.v6
View File

@ -27,13 +27,13 @@ COMMIT
*mangle
:PREROUTING ACCEPT [0:0]
{% for iface_name, iface_data in pillar['netbox']['interfaces'].items() %}{% if salt['pillar.get']('interfaces:'+iface_name+':netflow') %}
-A PREROUTING -i {{ iface_name }} -j NFLOG --nflog-group 2 --nflog-size 64 --nflog-threshold 64
-A PREROUTING -i {{ iface_name }} -m statistic --mode nth --packet 1 --every {{ salt['pillar.get']('netflow:sampling-rate',64) }} -j NFLOG --nflog-group 2 {% if salt['grains.get']('kernelrelease','') in ["4.19.52-amd64-vyos","4.19.84-amd64-vyos"] %}--nflog-range 64{% else %}--nflog-size 64{% endif %} --nflog-threshold 64
{% endif %}{% endfor %}
:INPUT ACCEPT [0:0]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [0:0]
:POSTROUTING ACCEPT [0:0]
{% for iface_name, iface_data in pillar['netbox']['interfaces'].items() %}{% if salt['pillar.get']('interfaces:'+iface_name+':netflow') %}
-A POSTROUTING -o {{ iface_name }} -j NFLOG --nflog-group 2 --nflog-size 64 --nflog-threshold 64
-A POSTROUTING -o {{ iface_name }} -m statistic --mode nth --packet 1 --every {{ salt['pillar.get']('netflow:sampling-rate',64) }} -j NFLOG --nflog-group 2 {% if salt['grains.get']('kernelrelease','') in ["4.19.52-amd64-vyos","4.19.84-amd64-vyos"] %}--nflog-range 64{% else %}--nflog-size 64{% endif %} --nflog-threshold 64
{% endif %}{% endfor %}
COMMIT

2
vyos.conf.j2
View File

@ -1332,7 +1332,7 @@ system {
interface {{ iface_name }}
{% endif %}{% endfor %}
netflow {
sampling-rate {{ pillar['netflow']['sampling-rate']}}
sampling-rate 1
{% for server in pillar['netflow']['servers'] %}
server {{ server.split(":")[0] }} {
port {{ server.split(":")[1] }}