Bryan Boreham
0205adcedb
Remove things like "args" and "env" which bulk the logs, aren't relevant to the function of weave-npc, and may include sensitive information. Use a black-list rather than a white-list because we can't be sure what information will be necessary in future.
60 lines
1.6 KiB
Go
60 lines
1.6 KiB
Go
package npc
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import (
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"encoding/json"
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)
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// Return JSON suitable for logging an API object.
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func js(v interface{}) string {
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// Get the raw JSON
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a, _ := json.Marshal(v)
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// Convert this back into a tree of key-value maps
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var m map[string]interface{}
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if err := json.Unmarshal(a, &m); err != nil {
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// If that didn't work, just return the raw version
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return string(a)
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}
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// Trim some bulk, and potentially sensitive areas
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withMap(m["metadata"], func(status map[string]interface{}) {
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delete(status, "ownerReferences")
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})
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withMap(m["spec"], func(spec map[string]interface{}) {
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delete(spec, "tolerations")
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delete(spec, "volumes")
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rangeSlice(spec["containers"], func(container map[string]interface{}) {
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delete(container, "args")
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delete(container, "command")
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delete(container, "env")
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delete(container, "livenessProbe")
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delete(container, "resources")
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delete(container, "securityContext")
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delete(container, "volumeMounts")
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})
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})
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withMap(m["status"], func(status map[string]interface{}) {
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delete(status, "containerStatuses")
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})
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// Now marshall what's left to JSON
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a, _ = json.Marshal(m)
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return string(a)
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}
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// Helper function: operate on a map node from a tree of key-value maps
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func withMap(m interface{}, f func(map[string]interface{})) {
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if v, ok := m.(map[string]interface{}); ok {
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f(v)
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}
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}
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// Helper function: operate on all nodes under i which is a slice in a
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// tree of key-value maps
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func rangeSlice(i interface{}, f func(map[string]interface{})) {
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if s, ok := i.([]interface{}); ok {
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for _, v := range s {
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if m, ok := v.(map[string]interface{}); ok {
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f(m)
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}
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}
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}
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}
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