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kuttilib-clusters.go
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kuttilib-clusters.go
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package kuttilib
import (
"sort"
"time"
"github.com/kuttiproject/kuttilog"
"github.com/kuttiproject/drivercore"
)
// ClusterNames returns the names of all clusters. The
// order is not predictable.
func ClusterNames() []string {
result := make([]string, len(config.Clusters))
i := 0
for clustername := range config.Clusters {
result[i] = clustername
i++
}
return result
}
// Clusters returns all clusters, sorted in reverse order of
// creation time.
func Clusters() []*Cluster {
result := make([]*Cluster, len(config.Clusters))
i := 0
for _, cluster := range config.Clusters {
result[i] = cluster
i++
}
sort.Slice(result, func(a, b int) bool {
return result[a].createdAt.After(result[b].createdAt)
})
return result
}
// ForEachCluster iterates over clusters.
func ForEachCluster(f func(*Cluster) bool) {
for _, cluster := range config.Clusters {
if cancel := f(cluster); cancel {
break
}
}
}
// GetCluster gets a named cluster, or nil if not present.
func GetCluster(name string) (*Cluster, bool) {
cluster, ok := config.Clusters[name]
if !ok {
return nil, ok
}
return cluster, ok
}
// DeleteCluster deletes a cluster.
// Currently, the cluster must be empty.
func DeleteCluster(clustername string, force bool) error {
cluster, ok := GetCluster(clustername)
if !ok {
return errClusterDoesNotExist
}
if len(cluster.nodes) > 0 {
return errClusterNotEmpty
}
if cluster.Driver().UsesPerClusterNetworking() {
kuttilog.Println(kuttilog.Info, "Deleting network...")
err := cluster.deletenetwork()
if err != nil {
if !force {
return err
}
kuttilog.Printf(
kuttilog.Quiet,
"Warning: Errors returned while deleting network: %v. Some artifacts may need manual cleanup.",
err,
)
}
kuttilog.Println(kuttilog.Info, "Network deleted.")
}
delete(config.Clusters, clustername)
return clusterconfigmanager.Save()
}
func newunmanagedcluster(name string, k8sversion string, drivername string) (*Cluster, error) {
newCluster := &Cluster{
name: name,
k8sVersion: k8sversion,
driverName: drivername,
createdAt: time.Now(),
nodes: map[string]*Node{},
status: "UnInitialized",
}
// Ensure presence of Driver
err := newCluster.ensuredriver()
if err != nil {
return newCluster, err
}
// Create Network if required
if newCluster.Driver().UsesPerClusterNetworking() {
kuttilog.Println(kuttilog.Info, "Creating network...")
err = newCluster.createnetwork()
if err != nil {
return newCluster, err
}
kuttilog.Println(kuttilog.Info, "Network created.")
}
newCluster.clustertype = "Unmanaged"
newCluster.status = "Ready"
return newCluster, nil
}
// NewEmptyCluster creates a new, empty cluster.
// It uses ValidName to check name validity, and also checks if a cluster with the
// name already exists.
func NewEmptyCluster(name string, k8sversion string, drivername string) error {
// Validate name
err := ValidateClusterName(name)
if err != nil {
return err
}
// Validate driver
driver, ok := drivercore.GetDriver(drivername)
if !ok {
return errDriverDoesNotExist
}
// Validate k8sversion
driverimage, err := driver.GetImage(k8sversion)
if err != nil {
return err
}
if driverimage.Status() != drivercore.ImageStatusDownloaded {
return errImageNotAvailable
}
if driverimage.Deprecated() {
return errVersionDeprecated
}
// Create cluster
newCluster, err := newunmanagedcluster(name, k8sversion, drivername)
if err != nil {
return err
}
config.Clusters[name] = newCluster
return clusterconfigmanager.Save()
}