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remove volume size requirement and relax changes on update

This commit is contained in:
Felix Kunde 2019-11-28 17:45:34 +01:00
parent a0b0da3c8c
commit c48ddd1055
2 changed files with 18 additions and 19 deletions
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5
docs/user.md
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@ -40,9 +40,8 @@ you can find this example also in the manifests folder:
kubectl create -f manifests/minimal-postgres-manifest.yaml
```
Note, that the minimum volume size to properly run the `postgresql` resource is
`1Gi`. If a lower value is set in the manifest the operator will cancel ADD or
UPDATE events on this resource with an error.
Note, that the minimum volume size to run the `postgresql` resource on Elastic
Block Storage (EBS) is `1Gi`.
## Watch pods being created

32
pkg/cluster/cluster.go
View File

@ -500,7 +500,6 @@ func (c *Cluster) validateResources(spec *acidv1.PostgresSpec) error {
const (
cpuMinLimit = "256m"
memoryMinLimit = "256Mi"
volumeMinSize = "1Gi"
)
var (
@ -530,15 +529,6 @@ func (c *Cluster) validateResources(spec *acidv1.PostgresSpec) error {
}
}
volumeSize := spec.Volume.Size
isSmaller, err = util.IsSmallerQuantity(volumeSize, volumeMinSize)
if err != nil {
return fmt.Errorf("error validating volume size: %v", err)
}
if isSmaller {
return fmt.Errorf("defined volume size %s is below required minimum %s to properly run postgresql resource", volumeSize, volumeMinSize)
}
return nil
}
@ -552,6 +542,7 @@ func (c *Cluster) Update(oldSpec, newSpec *acidv1.Postgresql) error {
c.mu.Lock()
defer c.mu.Unlock()
oldStatus := c.Status
c.setStatus(acidv1.ClusterStatusUpdating)
c.setSpec(newSpec)
@ -563,6 +554,21 @@ func (c *Cluster) Update(oldSpec, newSpec *acidv1.Postgresql) error {
}
}()
// check if pod resources were edited below the enforced minimum limits
if err := c.validateResources(&newSpec.Spec); err != nil {
err = fmt.Errorf("insufficient resource limits specified: %v", err)
isCPULimitSmaller, err2 := util.IsSmallerQuantity(newSpec.Spec.Resources.ResourceLimits.CPU, oldSpec.Spec.Resources.ResourceLimits.CPU)
isMemoryLimitSmaller, err3 := util.IsSmallerQuantity(newSpec.Spec.Resources.ResourceLimits.Memory, oldSpec.Spec.Resources.ResourceLimits.Memory)
if oldStatus.Running() && !isCPULimitSmaller && !isMemoryLimitSmaller && err2 == nil && err3 == nil {
c.logger.Warning(err)
} else {
updateFailed = true
return err
}
}
if oldSpec.Spec.PgVersion != newSpec.Spec.PgVersion { // PG versions comparison
c.logger.Warningf("postgresql version change(%q -> %q) has no effect", oldSpec.Spec.PgVersion, newSpec.Spec.PgVersion)
//we need that hack to generate statefulset with the old version
@ -595,12 +601,6 @@ func (c *Cluster) Update(oldSpec, newSpec *acidv1.Postgresql) error {
}
}
// check pod resources and volume size and cancel update if they are too low
if err := c.validateResources(&c.Spec); err != nil {
updateFailed = true
return fmt.Errorf("insufficient resource limits specified: %v", err)
}
// Volume
if oldSpec.Spec.Size != newSpec.Spec.Size {
c.logger.Debugf("syncing persistent volumes")