1.参考：
https://xuxinkun.github.io/2018/09/03/graph-easy/ http://bloodgate.com/perl/graph/manual/faq.html
2.经典例子：描绘kubernetes主要组件的联系图
[clouder@xiaowei ~]$ echo '[kubectl],[kube-proxy],[kube-scheduler],[kube-controller],[kubelet]->[kube-api]->[etcd]' |graph-easy
+------------+
| kubectl |
+------------+
|
|
v
+-----------------+ +------------+ +---------+
| kube-controller | --> | | --> | etcd |
+-----------------+ | kube-api | +---------+
+-----------------+ | | +---------+
| kube-scheduler | --> | | <-- | kubelet |
+-----------------+ +------------+ +---------+
^
|
|
+------------+
| kube-proxy |
+------------+
3. 线上加上标：echo "[guangzhou]-- car -->[chaozhou]-- plain --> [guangzhou]" |graph-easy
plain +----------------------+ v | +-----------+ car +----------+ | guangzhou | -------> | chaozhou | +-----------+ +----------+
4.多个对象指向一个目标：
[clouder@xiaowei ~]$ echo '[b],[c]-->[a]'|graph-easy +---+ +---+ +---+ | b | --> | a | <-- | c | +---+ +---+ +---+