netdata汇聚多个节点的监测数据到一个中心节点

netdata proxy data config
the UUID generate from uuidgen
example is : a0047db7-6088-438a-b607-7f3b3e2e15a9
you can enable dbengine on the center to storage all data

# center conf

# config revice data rule
# by https://learn.netdata.cloud/docs/agent/streaming/#options-for-the-receiving-node
# /etc/netdata/stream.conf
[a0047db7-6088-438a-b607-7f3b3e2e15a9]
    enabled = yes
    default history = 3600
    default memory mode = dbengine
    health enabled by default = auto
    allow from = *

# enable dbengine on center
# by https://learn.netdata.cloud/docs/agent/database/engine/#configuration
# /etc/netdata/netdata.conf
[global]
    memory mode = dbengine
    page cache size = 32
    dbengine disk space = 256

# node conf
# by https://learn.netdata.cloud/docs/agent/streaming/#options-for-the-sending-node
# /etc/netdata/stream.conf
[stream]
    enabled = yes
    destination = 192.168.137.164:19999
    api key = a0047db7-6088-438a-b607-7f3b3e2e15a9

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出现节点数量始终不能超过某一数值，例如slave节点数量始终不能超过4个的现象时，可能是因为文件打开句柄数受限了

可以使用以下方法在systemd配置文件中扩大句柄数限制

systemctl edit netdata

[Service]
LimitNOFILE=65536