| package main |
| |
| import ( |
| "encoding/pem" |
| "fmt" |
| "time" |
| |
| "github.com/golang/glog" |
| corev1 "k8s.io/api/core/v1" |
| rbacv1 "k8s.io/api/rbac/v1" |
| "k8s.io/apimachinery/pkg/api/errors" |
| metav1 "k8s.io/apimachinery/pkg/apis/meta/v1" |
| "k8s.io/client-go/kubernetes" |
| "k8s.io/client-go/rest" |
| |
| pb "code.hackerspace.pl/hscloud/cluster/prodvider/proto" |
| ) |
| |
| func (p *prodvider) kubernetesCreds(username string) (*pb.KubernetesKeys, error) { |
| o := fmt.Sprintf("sso:%s", username) |
| |
| csrPEM, keyPEM, err := p.makeKubernetesCSR(username+"@hackerspace.pl", o) |
| if err != nil { |
| return nil, err |
| } |
| |
| certPEM, err := p.makeKubernetesCertificate(csrPEM, time.Now().Add(13*time.Hour)) |
| if err != nil { |
| return nil, err |
| } |
| |
| caCert, _ := p.sign.Certificate("", "") |
| caPEM := pem.EncodeToMemory(&pem.Block{Type: "CERTIFICATE", Bytes: caCert.Raw}) |
| |
| // Build certificate chain from new cert and intermediate CA. |
| chainPEM := append(certPEM, caPEM...) |
| |
| glog.Infof("Generated k8s certificate for %q", username) |
| return &pb.KubernetesKeys{ |
| Cluster: "k0.hswaw.net", |
| // APIServerCA |
| Ca: p.kubeCAPEM, |
| // Chain of new cert + intermediate CA |
| Cert: chainPEM, |
| Key: keyPEM, |
| }, nil |
| } |
| |
| func (p *prodvider) kubernetesConnect() error { |
| csrPEM, keyPEM, err := p.makeKubernetesCSR("prodvider", "system:masters") |
| if err != nil { |
| return err |
| } |
| |
| certPEM, err := p.makeKubernetesCertificate(csrPEM, time.Now().Add(30*24*time.Hour)) |
| if err != nil { |
| return err |
| } |
| |
| caCert, _ := p.sign.Certificate("", "") |
| |
| caPEM := pem.EncodeToMemory(&pem.Block{Type: "CERTIFICATE", Bytes: caCert.Raw}) |
| |
| glog.Infof("Generated k8s certificate for self (system:masters)") |
| |
| // Build certificate chain from our cert and intermediate CA. |
| chainPEM := append(certPEM, caPEM...) |
| |
| config := &rest.Config{ |
| Host: flagKubernetesHost, |
| TLSClientConfig: rest.TLSClientConfig{ |
| // Chain to authenticate ourselves (us + intermediate CA). |
| CertData: chainPEM, |
| KeyData: keyPEM, |
| // APIServer CA for verification. |
| CAData: p.kubeCAPEM, |
| }, |
| } |
| |
| cs, err := kubernetes.NewForConfig(config) |
| if err != nil { |
| return err |
| } |
| |
| p.k8s = cs |
| |
| return nil |
| } |
| |
| // kubernetesSetupUser ensures that for a given SSO username we: |
| // - have a personal-<username> namespace |
| // - have a sso:<username>:personal rolebinding that binds |
| // system:admin-namespace to the user within their personal namespace |
| // - have a sso:<username>:global clusterrolebinding that binds |
| // system:viewer to the user at cluster level |
| func (p *prodvider) kubernetesSetupUser(username string) error { |
| namespace := "personal-" + username |
| if err := p.ensureNamespace(namespace); err != nil { |
| return err |
| } |
| if err := p.ensureRoleBindingPersonal(namespace, username); err != nil { |
| return err |
| } |
| if err := p.ensureClusterRoleBindingGlobal(username); err != nil { |
| return err |
| } |
| |
| return nil |
| } |
| |
| func (p *prodvider) ensureNamespace(name string) error { |
| _, err := p.k8s.CoreV1().Namespaces().Get(name, metav1.GetOptions{}) |
| switch { |
| case err == nil: |
| // Already exists, nothing to do |
| return nil |
| case errors.IsNotFound(err): |
| break |
| default: |
| // Something went wrong. |
| return err |
| } |
| ns := &corev1.Namespace{ |
| ObjectMeta: metav1.ObjectMeta{ |
| Name: name, |
| }, |
| } |
| _, err = p.k8s.CoreV1().Namespaces().Create(ns) |
| return err |
| } |
| |
| func (p *prodvider) ensureRoleBindingPersonal(namespace, username string) error { |
| name := "sso:" + username + ":personal" |
| rb := &rbacv1.RoleBinding{ |
| ObjectMeta: metav1.ObjectMeta{ |
| Name: name, |
| Namespace: namespace, |
| }, |
| Subjects: []rbacv1.Subject{ |
| { |
| APIGroup: "rbac.authorization.k8s.io", |
| Kind: "User", |
| Name: username + "@hackerspace.pl", |
| }, |
| }, |
| RoleRef: rbacv1.RoleRef{ |
| APIGroup: "rbac.authorization.k8s.io", |
| Kind: "ClusterRole", |
| Name: "system:admin-namespace", |
| }, |
| } |
| |
| rbs := p.k8s.RbacV1().RoleBindings(namespace) |
| _, err := rbs.Get(name, metav1.GetOptions{}) |
| switch { |
| case err == nil: |
| // Already exists, update. |
| _, err = rbs.Update(rb) |
| return err |
| case errors.IsNotFound(err): |
| // Create. |
| _, err = rbs.Create(rb) |
| return err |
| default: |
| // Something went wrong. |
| return err |
| } |
| } |
| |
| func (p *prodvider) ensureClusterRoleBindingGlobal(username string) error { |
| name := "sso:" + username + ":global" |
| rb := &rbacv1.ClusterRoleBinding{ |
| ObjectMeta: metav1.ObjectMeta{ |
| Name: name, |
| }, |
| Subjects: []rbacv1.Subject{ |
| { |
| APIGroup: "rbac.authorization.k8s.io", |
| Kind: "User", |
| Name: username + "@hackerspace.pl", |
| }, |
| }, |
| RoleRef: rbacv1.RoleRef{ |
| APIGroup: "rbac.authorization.k8s.io", |
| Kind: "ClusterRole", |
| Name: "system:viewer", |
| }, |
| } |
| |
| crbs := p.k8s.RbacV1().ClusterRoleBindings() |
| _, err := crbs.Get(name, metav1.GetOptions{}) |
| switch { |
| case err == nil: |
| // Already exists, update. |
| _, err = crbs.Update(rb) |
| return err |
| case errors.IsNotFound(err): |
| // Create. |
| _, err = crbs.Create(rb) |
| return err |
| default: |
| // Something went wrong. |
| return err |
| } |
| } |