implement etcd status for openstack

pkg/commands/status_discovery.go

@@ -94,5 +94,9 @@ func (s *CloudDiscoveryStatusStore) FindClusterStatus(cluster *kops.Cluster) (*k
 	if aliCloud, ok := cloud.(aliup.ALICloud); ok {
 		return aliCloud.FindClusterStatus(cluster)
 	}
+
+	if osCloud, ok := cloud.(openstack.OpenstackCloud); ok {
+		return osCloud.FindClusterStatus(cluster)
+	}
 	return nil, fmt.Errorf("Etcd Status not implemented for %T", cloud)
 }

upup/pkg/fi/cloudup/openstack/cloud.go

@@ -59,6 +59,7 @@ import (
 const TagNameEtcdClusterPrefix = "k8s.io/etcd/"
 const TagNameRolePrefix = "k8s.io/role/"
 const TagClusterName = "KubernetesCluster"
+const TagRoleMaster = "master"
 
 // ErrNotFound is used to inform that the object is not found
 var ErrNotFound = "Resource not found"
@@ -184,6 +185,8 @@ type OpenstackCloud interface {
 
 	GetApiIngressStatus(cluster *kops.Cluster) ([]kops.ApiIngressStatus, error)
 
+	FindClusterStatus(cluster *kops.Cluster) (*kops.ClusterStatus, error)
+
 	// DefaultInstanceType determines a suitable instance type for the specified instance group
 	DefaultInstanceType(cluster *kops.Cluster, ig *kops.InstanceGroup) (string, error)
 

upup/pkg/fi/cloudup/openstack/status.go

@@ -0,0 +1,94 @@
+/*
+Copyright 2019 The Kubernetes Authors.
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+    http://www.apache.org/licenses/LICENSE-2.0
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package openstack
+
+import (
+	"fmt"
+	"strings"
+
+	"github.com/golang/glog"
+	cinderv2 "github.com/gophercloud/gophercloud/openstack/blockstorage/v2/volumes"
+	"k8s.io/kops/pkg/apis/kops"
+	"k8s.io/kops/protokube/pkg/etcd"
+	"k8s.io/kops/upup/pkg/fi"
+)
+
+// FindClusterStatus discovers the status of the cluster, by looking for the tagged etcd volumes
+func (c *openstackCloud) FindClusterStatus(cluster *kops.Cluster) (*kops.ClusterStatus, error) {
+	etcdStatus, err := findEtcdStatus(c, cluster)
+	if err != nil {
+		return nil, err
+	}
+	status := &kops.ClusterStatus{
+		EtcdClusters: etcdStatus,
+	}
+	glog.V(2).Infof("Cluster status (from cloud): %v", fi.DebugAsJsonString(status))
+	return status, nil
+}
+
+// findEtcdStatus discovers the status of etcd, by looking for the tagged etcd volumes
+func findEtcdStatus(c *openstackCloud, cluster *kops.Cluster) ([]kops.EtcdClusterStatus, error) {
+	statusMap := make(map[string]*kops.EtcdClusterStatus)
+	glog.V(2).Infof("Querying Openstack for etcd volumes")
+	opt := cinderv2.ListOpts{
+		Metadata: c.tags,
+	}
+	volumes, err := c.ListVolumes(opt)
+	if err != nil {
+		return nil, fmt.Errorf("error describing volumes: %v", err)
+	}
+
+	for _, volume := range volumes {
+		volumeID := volume.ID
+
+		etcdClusterName := ""
+		var etcdClusterSpec *etcd.EtcdClusterSpec
+
+		master := false
+		for k, v := range volume.Metadata {
+			if strings.HasPrefix(k, TagNameEtcdClusterPrefix) {
+				etcdClusterName := strings.TrimPrefix(k, TagNameEtcdClusterPrefix)
+				etcdClusterSpec, err = etcd.ParseEtcdClusterSpec(etcdClusterName, v)
+				if err != nil {
+					return nil, fmt.Errorf("error parsing etcd cluster tag %q on volume %q: %v", v, volumeID, err)
+				}
+			} else if k == TagNameRolePrefix+TagRoleMaster {
+				master = true
+			}
+		}
+		if etcdClusterSpec == nil || !master {
+			continue
+		}
+
+		etcdClusterName = etcdClusterSpec.ClusterKey
+		status := statusMap[etcdClusterName]
+		if status == nil {
+			status = &kops.EtcdClusterStatus{
+				Name: etcdClusterName,
+			}
+			statusMap[etcdClusterName] = status
+		}
+
+		memberName := etcdClusterSpec.NodeName
+		status.Members = append(status.Members, &kops.EtcdMemberStatus{
+			Name:     memberName,
+			VolumeId: volume.ID,
+		})
+	}
+	var status []kops.EtcdClusterStatus
+	for _, v := range statusMap {
+		status = append(status, *v)
+	}
+	return status, nil
+}