forked from rancher/rke
/
reconcile.go
190 lines (176 loc) · 7.66 KB
/
reconcile.go
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package cluster
import (
"context"
"fmt"
"github.com/rancher/rke/hosts"
"github.com/rancher/rke/k8s"
"github.com/rancher/rke/log"
"github.com/rancher/rke/services"
"github.com/sirupsen/logrus"
"k8s.io/client-go/kubernetes"
)
const (
taintKey = "node-role.kubernetes.io/etcd"
)
func ReconcileCluster(ctx context.Context, kubeCluster, currentCluster *Cluster) error {
log.Infof(ctx, "[reconcile] Reconciling cluster state")
if currentCluster == nil {
log.Infof(ctx, "[reconcile] This is newly generated cluster")
return nil
}
kubeClient, err := k8s.NewClient(kubeCluster.LocalKubeConfigPath)
if err != nil {
return fmt.Errorf("Failed to initialize new kubernetes client: %v", err)
}
if err := reconcileEtcd(ctx, currentCluster, kubeCluster, kubeClient); err != nil {
return fmt.Errorf("Failed to reconcile etcd plane: %v", err)
}
if err := reconcileWorker(ctx, currentCluster, kubeCluster, kubeClient); err != nil {
return err
}
if err := reconcileControl(ctx, currentCluster, kubeCluster, kubeClient); err != nil {
return err
}
log.Infof(ctx, "[reconcile] Reconciled cluster state successfully")
return nil
}
func reconcileWorker(ctx context.Context, currentCluster, kubeCluster *Cluster, kubeClient *kubernetes.Clientset) error {
// worker deleted first to avoid issues when worker+controller on same host
logrus.Debugf("[reconcile] Check worker hosts to be deleted")
wpToDelete := hosts.GetToDeleteHosts(currentCluster.WorkerHosts, kubeCluster.WorkerHosts)
for _, toDeleteHost := range wpToDelete {
toDeleteHost.IsWorker = false
if err := hosts.DeleteNode(ctx, toDeleteHost, kubeClient, toDeleteHost.IsControl); err != nil {
return fmt.Errorf("Failed to delete worker node %s from cluster", toDeleteHost.Address)
}
// attempting to clean services/files on the host
if err := reconcileHost(ctx, toDeleteHost, true, false, currentCluster.SystemImages[AplineImage], currentCluster.DockerDialerFactory); err != nil {
log.Warnf(ctx, "[reconcile] Couldn't clean up worker node [%s]: %v", toDeleteHost.Address, err)
continue
}
}
// attempt to remove unschedulable taint
toAddHosts := hosts.GetToAddHosts(currentCluster.WorkerHosts, kubeCluster.WorkerHosts)
for _, host := range toAddHosts {
if host.IsEtcd {
if err := hosts.RemoveTaintFromHost(ctx, host, taintKey, kubeClient); err != nil {
return fmt.Errorf("[reconcile] Failed to remove unschedulable taint from node [%s]", host.Address)
}
}
}
return nil
}
func reconcileControl(ctx context.Context, currentCluster, kubeCluster *Cluster, kubeClient *kubernetes.Clientset) error {
logrus.Debugf("[reconcile] Check Control plane hosts to be deleted")
selfDeleteAddress, err := getLocalConfigAddress(kubeCluster.LocalKubeConfigPath)
if err != nil {
return err
}
cpToDelete := hosts.GetToDeleteHosts(currentCluster.ControlPlaneHosts, kubeCluster.ControlPlaneHosts)
// move the current host in local kubeconfig to the end of the list
for i, toDeleteHost := range cpToDelete {
if toDeleteHost.Address == selfDeleteAddress {
cpToDelete = append(cpToDelete[:i], cpToDelete[i+1:]...)
cpToDelete = append(cpToDelete, toDeleteHost)
}
}
for _, toDeleteHost := range cpToDelete {
kubeClient, err := k8s.NewClient(kubeCluster.LocalKubeConfigPath)
if err != nil {
return fmt.Errorf("Failed to initialize new kubernetes client: %v", err)
}
if err := hosts.DeleteNode(ctx, toDeleteHost, kubeClient, toDeleteHost.IsWorker); err != nil {
return fmt.Errorf("Failed to delete controlplane node %s from cluster", toDeleteHost.Address)
}
// attempting to clean services/files on the host
if err := reconcileHost(ctx, toDeleteHost, false, false, currentCluster.SystemImages[AplineImage], currentCluster.DockerDialerFactory); err != nil {
log.Warnf(ctx, "[reconcile] Couldn't clean up controlplane node [%s]: %v", toDeleteHost.Address, err)
continue
}
}
// rebuilding local admin config to enable saving cluster state
if err := rebuildLocalAdminConfig(ctx, kubeCluster); err != nil {
return err
}
// Rolling update on change for nginx Proxy
cpChanged := hosts.IsHostListChanged(currentCluster.ControlPlaneHosts, kubeCluster.ControlPlaneHosts)
if cpChanged {
log.Infof(ctx, "[reconcile] Rolling update nginx hosts with new list of control plane hosts")
err := services.RollingUpdateNginxProxy(ctx, kubeCluster.ControlPlaneHosts, kubeCluster.WorkerHosts, currentCluster.SystemImages[NginxProxyImage])
if err != nil {
return fmt.Errorf("Failed to rolling update Nginx hosts with new control plane hosts")
}
}
// attempt to remove unschedulable taint
toAddHosts := hosts.GetToAddHosts(currentCluster.ControlPlaneHosts, kubeCluster.ControlPlaneHosts)
for _, host := range toAddHosts {
if host.IsEtcd {
if err := hosts.RemoveTaintFromHost(ctx, host, taintKey, kubeClient); err != nil {
log.Warnf(ctx, "[reconcile] Failed to remove unschedulable taint from node [%s]", host.Address)
}
}
}
return nil
}
func reconcileHost(ctx context.Context, toDeleteHost *hosts.Host, worker, etcd bool, cleanerImage string, dialerFactory hosts.DialerFactory) error {
if err := toDeleteHost.TunnelUp(ctx, dialerFactory); err != nil {
return fmt.Errorf("Not able to reach the host: %v", err)
}
if worker {
if err := services.RemoveWorkerPlane(ctx, []*hosts.Host{toDeleteHost}, false); err != nil {
return fmt.Errorf("Couldn't remove worker plane: %v", err)
}
if err := toDeleteHost.CleanUpWorkerHost(ctx, cleanerImage); err != nil {
return fmt.Errorf("Not able to clean the host: %v", err)
}
} else if etcd {
if err := services.RemoveEtcdPlane(ctx, []*hosts.Host{toDeleteHost}, false); err != nil {
return fmt.Errorf("Couldn't remove etcd plane: %v", err)
}
if err := toDeleteHost.CleanUpEtcdHost(ctx, cleanerImage); err != nil {
return fmt.Errorf("Not able to clean the host: %v", err)
}
} else {
if err := services.RemoveControlPlane(ctx, []*hosts.Host{toDeleteHost}, false); err != nil {
return fmt.Errorf("Couldn't remove control plane: %v", err)
}
if err := toDeleteHost.CleanUpControlHost(ctx, cleanerImage); err != nil {
return fmt.Errorf("Not able to clean the host: %v", err)
}
}
return nil
}
func reconcileEtcd(ctx context.Context, currentCluster, kubeCluster *Cluster, kubeClient *kubernetes.Clientset) error {
log.Infof(ctx, "[reconcile] Check etcd hosts to be deleted")
etcdToDelete := hosts.GetToDeleteHosts(currentCluster.EtcdHosts, kubeCluster.EtcdHosts)
for _, etcdHost := range etcdToDelete {
if err := services.RemoveEtcdMember(ctx, etcdHost, kubeCluster.EtcdHosts, currentCluster.LocalConnDialerFactory); err != nil {
log.Warnf(ctx, "[reconcile] %v", err)
continue
}
if err := hosts.DeleteNode(ctx, etcdHost, kubeClient, etcdHost.IsControl); err != nil {
log.Warnf(ctx, "Failed to delete etcd node %s from cluster", etcdHost.Address)
continue
}
// attempting to clean services/files on the host
if err := reconcileHost(ctx, etcdHost, false, true, currentCluster.SystemImages[AplineImage], currentCluster.DockerDialerFactory); err != nil {
log.Warnf(ctx, "[reconcile] Couldn't clean up etcd node [%s]: %v", etcdHost.Address, err)
continue
}
}
log.Infof(ctx, "[reconcile] Check etcd hosts to be added")
etcdToAdd := hosts.GetToAddHosts(currentCluster.EtcdHosts, kubeCluster.EtcdHosts)
for _, etcdHost := range etcdToAdd {
etcdHost.ToAddEtcdMember = true
}
for _, etcdHost := range etcdToAdd {
if err := services.AddEtcdMember(ctx, etcdHost, kubeCluster.EtcdHosts, currentCluster.LocalConnDialerFactory); err != nil {
return err
}
etcdHost.ToAddEtcdMember = false
if err := services.ReloadEtcdCluster(ctx, kubeCluster.EtcdHosts, kubeCluster.Services.Etcd, currentCluster.LocalConnDialerFactory); err != nil {
return err
}
}
return nil
}