1fcbc7cf93
Signed-off-by: Tonis Tiigi <tonistiigi@gmail.com>
(cherry picked from commit 49d088d9ce)
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
52 lines
1.6 KiB
Go
52 lines
1.6 KiB
Go
package worker
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import (
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"math"
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"time"
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"github.com/moby/buildkit/client"
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)
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const defaultCap int64 = 2e9 // 2GB
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// tempCachePercent represents the percentage ratio of the cache size in bytes to temporarily keep for a short period of time (couple of days)
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// over the total cache size in bytes. Because there is no perfect value, a mathematically pleasing one was chosen.
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// The value is approximately 13.8
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const tempCachePercent = math.E * math.Pi * math.Phi
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// DefaultGCPolicy returns a default builder GC policy
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func DefaultGCPolicy(p string, defaultKeepBytes int64) []client.PruneInfo {
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keep := defaultKeepBytes
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if defaultKeepBytes == 0 {
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keep = detectDefaultGCCap(p)
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}
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tempCacheKeepBytes := int64(math.Round(float64(keep) / 100. * float64(tempCachePercent)))
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const minTempCacheKeepBytes = 512 * 1e6 // 512MB
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if tempCacheKeepBytes < minTempCacheKeepBytes {
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tempCacheKeepBytes = minTempCacheKeepBytes
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}
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return []client.PruneInfo{
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// if build cache uses more than 512MB delete the most easily reproducible data after it has not been used for 2 days
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{
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Filter: []string{"type==source.local,type==exec.cachemount,type==source.git.checkout"},
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KeepDuration: 48 * time.Hour,
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KeepBytes: tempCacheKeepBytes,
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},
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// remove any data not used for 60 days
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{
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KeepDuration: 60 * 24 * time.Hour,
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KeepBytes: keep,
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},
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// keep the unshared build cache under cap
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{
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KeepBytes: keep,
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},
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// if previous policies were insufficient start deleting internal data to keep build cache under cap
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{
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All: true,
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KeepBytes: keep,
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},
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}
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}
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