Collect netns #240
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Collect netns #240
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We already get the attibutes of ifprop during getifprop() after reading /proc/net/dev, thus remove the unnecessary second getter in deviatsyst(). Signed-off-by: Fei Li <lifei.shirley@bytedance.com>
The network devices, like eth2, are settled in another network namespace via `ip netns add` in some scenarios in the production environment. In this case, we have to switch to that new netns to get network related statistics, e.g. reading from /proc/net/dev, /proc/net/snmp, /proc/net/snmp6. This patch firstly adds the needed attributes, like 'netns', for collecting and displaying network namespace statistics. Then the following patches will do the real implementation. To pass the compiling, also update for atopsar, parsable and json. Also format some lines according to astyle. Signed-off-by: Fei Li <lifei.shirley@bytedance.com>
Signed-off-by: Fei Li <lifei.shirley@bytedance.com>
For linux kernel, it exposes almost 100 lines for /proc/net/snmp6 file. Considering multiple-netns situations, too many lines had to be read and transferred, which is quite time consuming and space consuming. Let's optimize this by adding 'idx' to mark the needed indicators' position in struct v6tab. During the first time reading, e.i. the init_net namespace, we record the positions. Then in the following other netns, we only need to store and transfer indicators' values according to their positions. Signed-off-by: Fei Li <lifei.shirley@bytedance.com>
This patch implements how to collect statistics for other netns by using `setns` to switch to another netns to read /proc files, and then use shared memory for parent-child IPC. Combined with actual needs and performance considerations, this patch only collects other netns's physical network devices stats. Virtual devices are ignored except the 'lo'. Signed-off-by: Fei Li <lifei.shirley@bytedance.com>
The default rule is splitting netns by blank space. And make sure the netns path exits. Signed-off-by: Fei Li <lifei.shirley@bytedance.com>
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The network devices, like eth2, are settled in another network namespace via
ip netns addin some scenarios in the production environment. In this case, we have to switch to that new netns to get network related statistics, e.g. reading from /proc/net/dev, /proc/net/snmp, /proc/net/snmp6.Add a 'netns' indicator to indicate which netns the network is belong to. And collect statistics for other netns by using
setnsto switch to another netns to read /proc files, and then use shared memory for parent-child IPC.Combined with actual needs and performance considerations, this patch only collects other netns's physical network devices stats. Virtual devices are ignored except the 'lo'.
To pass the compiling, also update for atopsar, parsable and json.
Also format some lines according to astyle.