ajorgensen opened a new pull request #2842: Add json format for dry-run URL: https://github.com/apache/incubator-heron/pull/2842 This adds json as an optional format for the dry-run output. Json is more easily machine readable than the other output formats and can be used to make deploy decisions based on the resources required and the resources available at deploy time. An example output for submit: ``` {"packingClass":"com.twitter.heron.packing.roundrobin.ResourceCompliantRRPacking","topology":"acking-topology","containers":[{"id":1,"resources":{"cpu":1.0,"ram":590558003,"disk":1181116006},"components":[{"component":"exclaim1","id":1,"index":0,"resources":{"cpu":1.0,"ram":536870912,"disk":1073741824}}]},{"id":2,"resources":{"cpu":1.0,"ram":590558003,"disk":1181116006},"components":[{"component":"exclaim1","id":2,"index":1,"resources":{"cpu":1.0,"ram":536870912,"disk":1073741824}}]},{"id":3,"resources":{"cpu":1.0,"ram":590558003,"disk":1181116006},"components":[{"component":"word","id":3,"index":0,"resources":{"cpu":1.0,"ram":536870912,"disk":1073741824}}]},{"id":4,"resources":{"cpu":1.0,"ram":590558003,"disk":1181116006},"components":[{"component":"word","id":4,"index":1,"resources":{"cpu":1.0,"ram":536870912,"disk":1073741824}}]}]} ``` The update command produces a similar output but it simply outputs both the old and the new packing plan in json format. It is up to the caller to determine how they want to compare the two and what parts of the difference they care about: ``` New packing plan: {"packingClass":"com.twitter.heron.packing.roundrobin.ResourceCompliantRRPacking","topology":"acking-topology","containers":[{"id":1,"resources":{"cpu":1.0,"ram":590558003,"disk":1181116006},"components":[{"component":"exclaim1","id":1,"index":0,"resources":{"cpu":1.0,"ram":536870912,"disk":1073741824}}]},{"id":3,"resources":{"cpu":1.0,"ram":590558003,"disk":1181116006},"components":[{"component":"word","id":3,"index":0,"resources":{"cpu":1.0,"ram":536870912,"disk":1073741824}}]},{"id":4,"resources":{"cpu":1.0,"ram":590558003,"disk":1181116006},"components":[{"component":"word","id":4,"index":1,"resources":{"cpu":1.0,"ram":536870912,"disk":1073741824}}]}]} Old packing plan: {"packingClass":"com.twitter.heron.packing.roundrobin.ResourceCompliantRRPacking","topology":"acking-topology","containers":[{"id":2,"resources":{"cpu":1.0,"ram":590558003,"disk":1181116006},"components":[{"component":"exclaim1","id":2,"index":1,"resources":{"cpu":1.0,"ram":536870912,"disk":1073741824}}]},{"id":1,"resources":{"cpu":1.0,"ram":590558003,"disk":1181116006},"components":[{"component":"exclaim1","id":1,"index":0,"resources":{"cpu":1.0,"ram":536870912,"disk":1073741824}}]},{"id":3,"resources":{"cpu":1.0,"ram":590558003,"disk":1181116006},"components":[{"component":"word","id":3,"index":0,"resources":{"cpu":1.0,"ram":536870912,"disk":1073741824}}]},{"id":4,"resources":{"cpu":1.0,"ram":590558003,"disk":1181116006},"components":[{"component":"word","id":4,"index":1,"resources":{"cpu":1.0,"ram":536870912,"disk":1073741824}}]}]} ```
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