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Fix division by zero to calculate memory usage

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Closes #41
This commit is contained in:
Julian Kornberger 2017-07-06 11:33:20 +02:00
parent fd7e712282
commit 2148a7de28
1 changed files with 14 additions and 10 deletions
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8
meshviewer/node.go
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@ -27,7 +27,7 @@ type Statistics struct {
Clients uint32 `json:"clients"`
RootFsUsage float64 `json:"rootfs_usage,omitempty"`
LoadAverage float64 `json:"loadavg,omitempty"`
MemoryUsage float64 `json:"memory_usage,omitempty"`
MemoryUsage *float64 `json:"memory_usage,omitempty"`
Uptime float64 `json:"uptime,omitempty"`
Idletime float64 `json:"idletime,omitempty"`
GatewayIPv4 string `json:"gateway,omitempty"`
@ -57,7 +57,11 @@ func NewStatistics(stats *data.Statistics) *Statistics {
* calc is coppied from node statuspage (look discussion:
* https://github.com/FreifunkBremen/yanic/issues/35)
*/
memoryUsage := 1 - (float64(stats.Memory.Free)+float64(stats.Memory.Buffers)+float64(stats.Memory.Cached))/float64(stats.Memory.Total)
var memoryUsage *float64
if stats.Memory.Total > 0 {
usage := 1 - (float64(stats.Memory.Free)+float64(stats.Memory.Buffers)+float64(stats.Memory.Cached))/float64(stats.Memory.Total)
memoryUsage = &usage
}
return &Statistics{
NodeID: stats.NodeID,