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Chris LuandGitHub
c194924d13
The dashboard charted one summed disk-usage line, so a step in the total gave no hint which cluster moved. A new panel stacks each cluster's daily size as its own band: the top of the stack is the fleet total, each band is one cluster, and the clusters past the twentieth are summed into an "other" band so the stack still adds up to the total. The series is built from the per-cluster daily histories and served by /api/cluster-sizes. Clusters report roughly once a day at no fixed hour, so a day with no report carries the previous value forward — dropping it to zero would sag the total every day as the clusters that have not reported yet fall out from under it. A cluster that stops reporting past the active window ends at its last sample instead of holding capacity forever. Ranking is by the most recent day, tie-broken on cluster id so the colors do not shuffle between refreshes. Hover and click resolve to the band under the pointer: Chart.js's builtin interaction modes match the nearest line, which on a stack of thin bands is rarely the band being pointed at. Clicking one fills the per-cluster history lookup below it.