pipeline 并行处理多个节点 job

https://jenkins.io/doc/pipeline/examples/#jobs-in-parallel
问题:
并行处理多个节点 job，node在数组中添加

Parallel Multiple Nodes 

Synopsis

This is a simple example showing how to succinctly parallel the same build across multiple Jenkins nodes. This is useful for e.g. building the same project on multiple OS platforms.

def labels = ['precise', 'trusty'] // labels for Jenkins node types we will build on
def builders = [:]
for (x in labels) {
    def label = x // Need to bind the label variable before the closure - can't do 'for (label in labels)'
    [popexizhi：这里x是地址引用，如果做列表复制，一定要做局部变量]
    // Create a map to pass in to the 'parallel' step so we can fire all the builds at once
    builders[label] = {
      node(label) {
        // build steps that should happen on all nodes go here
      }
    }
}

parallel builders