Override clone s3 bucket path (#487)

Override clone s3 bucket path

Add possibility to use a custom s3 bucket path for cloning a cluster
from an arbitrary bucket (e.g. from another k8s cluster). For that
a new config options is introduced `s3_wal_path`, that should point
to a location that spilo would understand.

pkg/apis/acid.zalan.do/v1/postgresql_type.go

@@ -114,6 +114,7 @@ type CloneDescription struct {
 	ClusterName  string `json:"cluster,omitempty"`
 	UID          string `json:"uid,omitempty"`
 	EndTimestamp string `json:"timestamp,omitempty"`
+	S3WalPath    string `json:"s3_wal_path,omitempty"`
 }
 
 // Sidecar defines a container to be run in the same pod as the Postgres container.

pkg/apis/acid.zalan.do/v1/util_test.go

@@ -61,12 +61,12 @@ var cloneClusterDescriptions = []struct {
 	in  *CloneDescription
 	err error
 }{
-	{&CloneDescription{"foo+bar", "", "NotEmpty"}, nil},
-	{&CloneDescription{"foo+bar", "", ""},
+	{&CloneDescription{"foo+bar", "", "NotEmpty", ""}, nil},
+	{&CloneDescription{"foo+bar", "", "", ""},
 		errors.New(`clone cluster name must confirm to DNS-1035, regex used for validation is "^[a-z]([-a-z0-9]*[a-z0-9])?$"`)},
-	{&CloneDescription{"foobar123456789012345678901234567890123456789012345678901234567890", "", ""},
+	{&CloneDescription{"foobar123456789012345678901234567890123456789012345678901234567890", "", "", ""},
 		errors.New("clone cluster name must be no longer than 63 characters")},
-	{&CloneDescription{"foobar", "", ""}, nil},
+	{&CloneDescription{"foobar", "", "", ""}, nil},
 }
 
 var maintenanceWindows = []struct {