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Introduce RequestEviction feature for evicting pods in background

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When the feature is enabled each pod with descheduler.alpha.kubernetes.io/request-evict-only
annotation will have the eviction API error examined for a specific
error code/reason and message. If matched eviction of such a pod will be interpreted
as initiation of an eviction in background.
This commit is contained in:
Jan Chaloupka
2024-08-30 09:07:27 +02:00
parent f115e780d8
commit 3a1a3ff9d8
11 changed files with 1405 additions and 77 deletions
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10
pkg/framework/profile/profile.go
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@@ -305,7 +305,8 @@ func (d profileImpl) RunDeschedulePlugins(ctx context.Context, nodes []*v1.Node)
var span trace.Span
ctx, span = tracing.Tracer().Start(ctx, pl.Name(), trace.WithAttributes(attribute.String("plugin", pl.Name()), attribute.String("profile", d.profileName), attribute.String("operation", tracing.DescheduleOperation)))
defer span.End()
evicted := d.podEvictor.TotalEvicted()
evictedBeforeDeschedule := d.podEvictor.TotalEvicted()
evictionRequestsBeforeDeschedule := d.podEvictor.TotalEvictionRequests()
strategyStart := time.Now()
status := pl.Deschedule(ctx, nodes)
metrics.DeschedulerStrategyDuration.With(map[string]string{"strategy": pl.Name(), "profile": d.profileName}).Observe(time.Since(strategyStart).Seconds())
@@ -314,7 +315,7 @@ func (d profileImpl) RunDeschedulePlugins(ctx context.Context, nodes []*v1.Node)
span.AddEvent("Plugin Execution Failed", trace.WithAttributes(attribute.String("err", status.Err.Error())))
errs = append(errs, fmt.Errorf("plugin %q finished with error: %v", pl.Name(), status.Err))
}
klog.V(1).InfoS("Total number of pods evicted", "extension point", "Deschedule", "evictedPods", d.podEvictor.TotalEvicted()-evicted)
klog.V(1).InfoS("Total number of evictions/requests", "extension point", "Deschedule", "evictedPods", d.podEvictor.TotalEvicted()-evictedBeforeDeschedule, "evictionRequests", d.podEvictor.TotalEvictionRequests()-evictionRequestsBeforeDeschedule)
}
aggrErr := errors.NewAggregate(errs)
@@ -333,7 +334,8 @@ func (d profileImpl) RunBalancePlugins(ctx context.Context, nodes []*v1.Node) *f
var span trace.Span
ctx, span = tracing.Tracer().Start(ctx, pl.Name(), trace.WithAttributes(attribute.String("plugin", pl.Name()), attribute.String("profile", d.profileName), attribute.String("operation", tracing.BalanceOperation)))
defer span.End()
evicted := d.podEvictor.TotalEvicted()
evictedBeforeBalance := d.podEvictor.TotalEvicted()
evictionRequestsBeforeBalance := d.podEvictor.TotalEvictionRequests()
strategyStart := time.Now()
status := pl.Balance(ctx, nodes)
metrics.DeschedulerStrategyDuration.With(map[string]string{"strategy": pl.Name(), "profile": d.profileName}).Observe(time.Since(strategyStart).Seconds())
@@ -342,7 +344,7 @@ func (d profileImpl) RunBalancePlugins(ctx context.Context, nodes []*v1.Node) *f
span.AddEvent("Plugin Execution Failed", trace.WithAttributes(attribute.String("err", status.Err.Error())))
errs = append(errs, fmt.Errorf("plugin %q finished with error: %v", pl.Name(), status.Err))
}
klog.V(1).InfoS("Total number of pods evicted", "extension point", "Balance", "evictedPods", d.podEvictor.TotalEvicted()-evicted)
klog.V(1).InfoS("Total number of evictions/requests", "extension point", "Balance", "evictedPods", d.podEvictor.TotalEvicted()-evictedBeforeBalance, "evictionRequests", d.podEvictor.TotalEvictionRequests()-evictionRequestsBeforeBalance)
}
aggrErr := errors.NewAggregate(errs)