// Update updates configuration of a managed swarm cluster.
func (c *Cluster) Update(version uint64, spec types.Spec) error {
c.RLock()
defer c.RUnlock()
if !c.isActiveManager() {
return ErrNoManager
}
swarm, err := getSwarm(c.getRequestContext(), c.client)
if err != nil {
return err
}
swarmSpec, err := convert.SwarmSpecToGRPCandMerge(spec, &swarm.Spec)
if err != nil {
return err
}
_, err = c.client.UpdateCluster(
c.getRequestContext(),
&swarmapi.UpdateClusterRequest{
ClusterID: swarm.ID,
Spec: &swarmSpec,
ClusterVersion: &swarmapi.Version{
Index: version,
},
},
)
return err
}
func initClusterSpec(node *swarmagent.Node, spec types.Spec) error {
ctx, _ := context.WithTimeout(context.Background(), 5*time.Second)
for conn := range node.ListenControlSocket(ctx) {
if ctx.Err() != nil {
return ctx.Err()
}
if conn != nil {
client := swarmapi.NewControlClient(conn)
var cluster *swarmapi.Cluster
for i := 0; ; i++ {
lcr, err := client.ListClusters(ctx, &swarmapi.ListClustersRequest{})
if err != nil {
return fmt.Errorf("error on listing clusters: %v", err)
}
if len(lcr.Clusters) == 0 {
if i < 10 {
time.Sleep(200 * time.Millisecond)
continue
}
return fmt.Errorf("empty list of clusters was returned")
}
cluster = lcr.Clusters[0]
break
}
newspec, err := convert.SwarmSpecToGRPCandMerge(spec, &cluster.Spec)
if err != nil {
return fmt.Errorf("error updating cluster settings: %v", err)
}
_, err = client.UpdateCluster(ctx, &swarmapi.UpdateClusterRequest{
ClusterID: cluster.ID,
ClusterVersion: &cluster.Meta.Version,
Spec: &newspec,
})
if err != nil {
return fmt.Errorf("error updating cluster settings: %v", err)
}
return nil
}
}
return ctx.Err()
}