Kubernetes的 client-go #19
wangjc0216
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Kubernetes
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Informer主要有两个方法: List 和 Watch ; |
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DeltaFifo中 需要注意的两个字段,一个queue slice,一个items map。queue用于保证顺序,items中的value是Deltas,本质也是一个slice。 DeltaFifo会按照对象进行分桶,并把同一个对象的变更操作放在一个Deltas中。如果该对象第一次添加,则会append queue,否则直接更改Deltas并进行duplicate。比如把服务副本scale成 +1 后马上又-1,这就可以起到去重的效果。 |
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Informer有4中类型,Informer,IndexInformer,SharedInformer,SharedIndexInformer,下面有一段代码示例: |
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当创建一个SharedInformer()的时候,可以传入indexers和EventHandler。 |
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client主要分为以下几类:
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