问题描述
我的理解
worker server 为 IP，即一台主机
worker 节点为IP:PORT ，一台worker server可以启动多个worker节点
我有3台worker服务器，如果按照默认拓扑进行部署，会启动3个worker节点，端口为：8262
当添加第四个数据源时，会抛出：“msg”: “source is added but there is no free worker to bound”
如果每个数据源都需要一个worker，按照文档说的，都要加一台机器，显然不合适
在DM V1.x版本是可以基于IP:PORT启动多个worker节点的，那DM 2.x版本有没有方法启动多个worker节点呢，实现资源复用。文档没找到方法
如何扩容worker节点呢？
官方文档没说这块，建议加上
这里需要注意，如果您机器资源足够好，可以一台worker server复用多个worker节点
扩容方法：
这里我扩容3个worker节点，端口为8263，ip不变，server复用
如果想继续扩容，可以修改端口为：8264、8265等
vim scale.yaml
worker_servers:
- host: 172.16.25.247
port: 8263
- host: 172.16.25.84
port: 8263
- host: 1172.16.25.80
port: 8263
执行扩容命令
tiup dm scale-out dm-yzh scale.yaml -p
扩容完成后，验证是否生效
[tidb@bj3-tidb_dm-master-prod-01 ~]$ tiup dm display dm-yzh
Starting component `dm`: /home/tidb/.tiup/components/dm/v1.6.0/tiup-dm display dm-yzh
Cluster type: dm
Cluster name: dm-yzh
Cluster version: v2.0.7
Deploy user: tidb
SSH type: builtin
ID Role Host Ports OS/Arch Status Data Dir Deploy Dir
-- ---- ---- ----- ------- ------ -------- ----------
172.16.25.101:9093 alertmanager 172.16.25.101 9093/9094 linux/x86_64 Up /data/tidb/dm/data/alertmanager-9093 /data/tidb/dm/deploy/alertmanager-9093
172.16.25.101:8261 dm-master 172.16.25.101 8261/8291 linux/x86_64 Healthy /data/tidb/dm/data/dm-master-8261 /data/tidb/dm/deploy/dm-master-8261
172.16.25.148:8261 dm-master 172.16.25.148 8261/8291 linux/x86_64 Healthy /data/tidb/dm/data/dm-master-8261 /data/tidb/dm/deploy/dm-master-8261
172.16.25.42:8261 dm-master 172.16.25.42 8261/8291 linux/x86_64 Healthy|L /data/tidb/dm/data/dm-master-8261 /data/tidb/dm/deploy/dm-master-8261
172.16.25.247:8262 dm-worker 172.16.25.247 8262 linux/x86_64 Bound /data/tidb/dm/data/dm-worker-8262 /data/tidb/dm/deploy/dm-worker-8262
172.16.25.247:8263 dm-worker 172.16.25.247 8263 linux/x86_64 Bound /data/tidb/dm/data/dm-worker-8263 /data/tidb/dm/deploy/dm-worker-8263
172.16.25.80:8262 dm-worker 172.16.25.80 8262 linux/x86_64 Bound /data/tidb/dm/data/dm-worker-8262 /data/tidb/dm/deploy/dm-worker-8262
172.16.25.80:8263 dm-worker 172.16.25.80 8263 linux/x86_64 Free /data/tidb/dm/data/dm-worker-8263 /data/tidb/dm/deploy/dm-worker-8263
172.16.25.84:8262 dm-worker 172.16.25.84 8262 linux/x86_64 Bound /data/tidb/dm/data/dm-worker-8262 /data/tidb/dm/deploy/dm-worker-8262
172.16.25.84:8263 dm-worker 172.16.25.84 8263 linux/x86_64 Free /data/tidb/dm/data/dm-worker-8263 /data/tidb/dm/deploy/dm-worker-8263
172.16.25.101:3000 grafana 172.16.25.101 3000 linux/x86_64 Up - /data/tidb/dm/deploy/grafana-3000
172.16.25.101:9090 prometheus 172.16.25.101 9090 linux/x86_64 Up /data/tidb/dm/data/prometheus-9090 /data/tidb/dm/deploy/prometheus-9090
Total nodes: 12
