αααα»αααααΎαααααα αΆααααααΆαααα α·ααααα»αααΆααααααα’αααααΌαααααααα½ααααααΆαααααααΎαααΆαα αΌαααααΎα ααααα Kubernetes αααααααΎ Dex, dex-k8s-authenticator αα·α GitHub α
meme αααα»ααααα»αααΈ Kubernetes ααααααΆααΆααΆαα»ααααΈ
ααα ααααΈααααΆα
ααΎαααααΎ Kubernetes ααΎααααΈαααααΎαααα·ααΆααΆαααΆααααααααααΆααααΆαα’αα·αααααα αα·ααααα»α QAα ααΌα ααααααΎαα αααααααα±αααα½αααααΌαααΆαα αΌαααααΎα ααααααααααΆααααΆααααααΆααααααααααα αα·α kubectlα αα·αααΌα OpenShift αα vanilla Kubernetes αα·αααΆαααΆααααααααααΆααααΎααα ααΌα ααααααΎαααααΎα§αααααααΆααΈααΈααΈαααααΆααααΆααααα
αα αααα»αααΆααααααααα ααΎαααααΎα
dex-k8s-αααααα·ααΈαααααααααΆααβ - αααααα·ααΈαααααΆααααααΆαααααααΎαααΆαααααα kubectlDex - α’ααααααααααααΆ OpenID Connect- GitHub - αααααΆαααααΎαααααΎ GitHub αα αααα»ααααα»αα αα»αααααααΎαα
ααΎαααΆαααααΆααΆαααααΎ Google ODC ααα»ααααααΆα’αα»ααααΎα
ααΌα αααα ααΎααααΎαααΆαααααααα·αααα· Kubernetes ααααααΎαααααΎαααΆααααΆαααΌα ααααα αααα»αααΆααααα αΆαααΌαααΆαα
ααααΎαααΆαα’αα»ααααΆα
αααα’α·αααααα·α α αΎαα ααα’α»ααα α ααα»α αα½αα
- α’αααααααΎααααΆααα
αΌααα
αααα»α dex-k8s-autheticator (
login.k8s.example.com
) - dex-k8s-authentiator αααααΌαααααααααΎαα
Dex (
dex.k8s.example.com
) - Dex αααααΌααααααα αααααα αΌα GitHub
- GitHub αααααΎαααααααΆαααΆαα’αα»ααααΆαα αΆαααΆα α α αΎααααααΌαααΆαα Dex
- Dex αααααΌαααααααΆααααααα½αααΆααα dex-k8s-authentiator
- α’αααααααΎααααΆααααα½αααΆααααααΆαααααΆαα ODC ααΈ GitHub
- dex-k8s-authentiator αααααααααααΆαααααΆαααα kubeconfig
- kubectl αααααΌααααααΆαααααΆαααα KubeAPIServer
- KubeAPIServer αααα‘ααααΆαα αΌαααααΎ kubectl αααααα’ααααΎαααααΆαααααΆαααααααΆαα’αα»ααα
- α’αααααααΎααααΆααααα½αααΆααα·αααα·α αΌαααααΎααΈ kubectl
αααααααΆαααααα
ααΆααΆααα·αααΆαα ααΎαααΆαααα‘αΎαα
ααααα Kubernetes αα½α
α αΎα (k8s.example.com
) α αΎαααααααΆααααααΆαα½α HELM αααααΆαααα‘αΎαααΆαα»ααααααα ααΎαααααΆαα’αααααΆααα½ααα
ααΎ GitHub (super-org) αααααα
ααααα·αααΎα’ααααα·αααΆα HELM ααΌαααα‘αΎαααΆα
ααααΌαααΎαααααΌααααα α GitHub α
α
αΌααα
ααΆαααααααααΆααααααααααΆααα (https://github.com/organizations/super-org/settings/applications
) αα·ααααααΎααααααα·ααΈααααΈ (Authorized OAuth App)α
ααΆααααααΎααααααα·ααΈααααΈαα
ααΎ GitHub
ααααααααα»αααΆαααΆαα½α URLs α αΆαααΆα α α§ααΆα αααα
- URL αααααααΎαα
https://dex.k8s.example.com
- URL α α
αααα‘αααααα·ααααααΆαααΆαα’αα»ααααΆαα
https://dex.k8s.example.com/callback
ααΌαααααααααααΆαα½ααααααααΆαα ααΆααΆααΆαααααΆααααΆααααααα·αααΆααααααααααΆα
ααΎααααΈααααΎααααα
ααΉααααααααααααΆααααα
αα GitHub ααΉααααααΎα Client ID
ΠΈ Client secret
αααααΆααΆαα
αααααααααααΆααα»ααααα·ααΆα αα½αααααΉαααΆαααααααααα
ααααααΎα (α§ααΆα ααα ααΎαααααΎ
Client ID: 1ab2c3d4e5f6g7h8
Client secret: 98z76y54x32w1
αααα
ααααααααααΆ DNS αααααΆααααααα login.k8s.example.com
ΠΈ dex.k8s.example.com
ααααΌα
ααΆαα·ααααΆαααααα SSL αααααΆααααΆαα
αΌαα
ααααααααΎααα·ααααΆαααααα SSLα
cat <<EOF | kubectl create -f -
apiVersion: certmanager.k8s.io/v1alpha1
kind: Certificate
metadata:
name: cert-auth-dex
namespace: kube-system
spec:
secretName: cert-auth-dex
dnsNames:
- dex.k8s.example.com
acme:
config:
- http01:
ingressClass: nginx
domains:
- dex.k8s.example.com
issuerRef:
name: le-clusterissuer
kind: ClusterIssuer
---
apiVersion: certmanager.k8s.io/v1alpha1
kind: Certificate
metadata:
name: cert-auth-login
namespace: kube-system
spec:
secretName: cert-auth-login
dnsNames:
- login.k8s.example.com
acme:
config:
- http01:
ingressClass: nginx
domains:
- login.k8s.example.com
issuerRef:
name: le-clusterissuer
kind: ClusterIssuer
EOF
kubectl describe certificates cert-auth-dex -n kube-system
kubectl describe certificates cert-auth-login -n kube-system
ClusterIssuer αααααΆαα
αααααΎα le-clusterissuer
αα½αααααΆααα½α
α αΎα ααα»ααααααααα·αααΎαα·αααΆααα αααααΎαααΆαααααααΎ HELMα
helm install --namespace kube-system -n cert-manager stable/cert-manager
cat << EOF | kubectl create -f -
apiVersion: certmanager.k8s.io/v1alpha1
kind: ClusterIssuer
metadata:
name: le-clusterissuer
namespace: kube-system
spec:
acme:
server: https://acme-v02.api.letsencrypt.org/directory
email: [email protected]
privateKeySecretRef:
name: le-clusterissuer
http01: {}
EOF
ααΆαααααααα ααΆαααααααα KubeAPIServer
ααΎααααΈα±αα kubeAPIServer ααααΎαααΆα α’αααααααΌαααααααα ααΆαααααααα OIDC αα·αααααΎαα αα α»ααααααααΆαα αααααα
kops edit cluster
...
kubeAPIServer:
anonymousAuth: false
authorizationMode: RBAC
oidcClientID: dex-k8s-authenticator
oidcGroupsClaim: groups
oidcIssuerURL: https://dex.k8s.example.com/
oidcUsernameClaim: email
kops update cluster --yes
kops rolling-update cluster --yes
ααΎαβααααΎ
ααΆαααααααα ααΆαααααααα Dex αα·α dex-k8s-Authenticator
ααΎααααΈα±αα Dex ααααΎαααΆα α’αααααααΌαααΆααα·ααααΆαααααα αα·ααααααΈαα Kubernetes ααΌαααααΆααΈααΈαααα
sudo cat /srv/kubernetes/ca.{crt,key}
-----BEGIN CERTIFICATE-----
AAAAAAAAAAABBBBBBBBBBCCCCCC
-----END CERTIFICATE-----
-----BEGIN RSA PRIVATE KEY-----
DDDDDDDDDDDEEEEEEEEEEFFFFFF
-----END RSA PRIVATE KEY-----
αααααααΌαααααΆαα dex-k8s-authenticatorα
git clone [email protected]:mintel/dex-k8s-authenticator.git
cd dex-k8s-authenticator/
αααααααΎα―αααΆαααααα ααΎαα’αΆα
ααααααα
ααΆααααααααα’ααααααααΆααααααααΎαα
α αΌααααααΆα’αααΈααΆαααααααα ααΆαααααααααααααΆαα Dexα
cat << EOF > values-dex.yml
global:
deployEnv: prod
tls:
certificate: |-
-----BEGIN CERTIFICATE-----
AAAAAAAAAAABBBBBBBBBBCCCCCC
-----END CERTIFICATE-----
key: |-
-----BEGIN RSA PRIVATE KEY-----
DDDDDDDDDDDEEEEEEEEEEFFFFFF
-----END RSA PRIVATE KEY-----
ingress:
enabled: true
annotations:
kubernetes.io/ingress.class: nginx
kubernetes.io/tls-acme: "true"
path: /
hosts:
- dex.k8s.example.com
tls:
- secretName: cert-auth-dex
hosts:
- dex.k8s.example.com
serviceAccount:
create: true
name: dex-auth-sa
config: |
issuer: https://dex.k8s.example.com/
storage: # https://github.com/dexidp/dex/issues/798
type: sqlite3
config:
file: /var/dex.db
web:
http: 0.0.0.0:5556
frontend:
theme: "coreos"
issuer: "Example Co"
issuerUrl: "https://example.com"
logoUrl: https://example.com/images/logo-250x25.png
expiry:
signingKeys: "6h"
idTokens: "24h"
logger:
level: debug
format: json
oauth2:
responseTypes: ["code", "token", "id_token"]
skipApprovalScreen: true
connectors:
- type: github
id: github
name: GitHub
config:
clientID: $GITHUB_CLIENT_ID
clientSecret: $GITHUB_CLIENT_SECRET
redirectURI: https://dex.k8s.example.com/callback
orgs:
- name: super-org
teams:
- team-red
staticClients:
- id: dex-k8s-authenticator
name: dex-k8s-authenticator
secret: generatedLongRandomPhrase
redirectURIs:
- https://login.k8s.example.com/callback/
envSecrets:
GITHUB_CLIENT_ID: "1ab2c3d4e5f6g7h8"
GITHUB_CLIENT_SECRET: "98z76y54x32w1"
EOF
α αΎααααααΆαα dex-k8s-authentiatorα
cat << EOF > values-auth.yml
global:
deployEnv: prod
dexK8sAuthenticator:
clusters:
- name: k8s.example.com
short_description: "k8s cluster"
description: "Kubernetes cluster"
issuer: https://dex.k8s.example.com/
k8s_master_uri: https://api.k8s.example.com
client_id: dex-k8s-authenticator
client_secret: generatedLongRandomPhrase
redirect_uri: https://login.k8s.example.com/callback/
k8s_ca_pem: |
-----BEGIN CERTIFICATE-----
AAAAAAAAAAABBBBBBBBBBCCCCCC
-----END CERTIFICATE-----
ingress:
enabled: true
annotations:
kubernetes.io/ingress.class: nginx
kubernetes.io/tls-acme: "true"
path: /
hosts:
- login.k8s.example.com
tls:
- secretName: cert-auth-login
hosts:
- login.k8s.example.com
EOF
ααα‘αΎα Dex αα·α dex-k8s-authentiatorα
helm install -n dex --namespace kube-system --values values-dex.yml charts/dex
helm install -n dex-auth --namespace kube-system --values values-auth.yml charts/dex-k8s-authenticator
α αΌαααΎααα·αα·αααααΎααα»αααΆαααααααααΆαααα (Dex αα½ααααααα‘αααααααΌα 400 α αΎα dex-k8s-autheticator αα½ααααα‘αααααααΌα 200)α
curl -sI https://dex.k8s.example.com/callback | head -1
HTTP/2 400
curl -sI https://login.k8s.example.com/ | head -1
HTTP/2 200
ααΆαααααααα ααΆαααααααα RBAC
ααΎααααααΎα ClusterRole αααααΆαααααα»α αααα»αααααΈααααααΎαααΆαα½αααΉαααΆαα αΌαααααΎααΆαααα’αΆαα
cat << EOF | kubectl create -f -
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
name: cluster-read-all
rules:
-
apiGroups:
- ""
- apps
- autoscaling
- batch
- extensions
- policy
- rbac.authorization.k8s.io
- storage.k8s.io
resources:
- componentstatuses
- configmaps
- cronjobs
- daemonsets
- deployments
- events
- endpoints
- horizontalpodautoscalers
- ingress
- ingresses
- jobs
- limitranges
- namespaces
- nodes
- pods
- pods/log
- pods/exec
- persistentvolumes
- persistentvolumeclaims
- resourcequotas
- replicasets
- replicationcontrollers
- serviceaccounts
- services
- statefulsets
- storageclasses
- clusterroles
- roles
verbs:
- get
- watch
- list
- nonResourceURLs: ["*"]
verbs:
- get
- watch
- list
- apiGroups: [""]
resources: ["pods/exec"]
verbs: ["create"]
EOF
ααααααααΎαααΆαααααααααααΆαα ClusterRoleBindingα
cat <<EOF | kubectl create -f -
apiVersion: rbac.authorization.k8s.io/v1beta1
kind: ClusterRoleBinding
metadata:
name: dex-cluster-auth
namespace: kube-system
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: ClusterRole
name: cluster-read-all
subjects:
kind: Group
name: "super-org:team-red"
EOF
α₯α‘αΌααααααΎαααααααα½α ααΆαααααααΆααααΆαααΆαααααα
αααααα
α
αΌααα
ααΆαααααααα
αΌα (https://login.k8s.example.com
) α αΎαα
αΌααααααααΎααααΈ GitHub ααααα’αααα
αααααα
αΌα
αααααα
αΌαααααΌαααΆααααααΌααααααα
GitHub
α’αα»ααααααΆαααΆαααααΆααααααΆααααααΎα ααΎααααΈααα½αααΆααα·αααα·α
αΌαααααΎααααΆαα
αααααΆααβααΈβα ααααβαα·αβααααΆααβααΈβαααααβαααααΆα ααΎαβα’αΆα βααααΎ kubectl ααΎααααΈβαααααααααβααααΆαβα αααααβααααβααΎαα
kubectl get po
NAME READY STATUS RESTARTS AGE
mypod 1/1 Running 0 3d
kubectl delete po mypod
Error from server (Forbidden): pods "mypod" is forbidden: User "[email protected]" cannot delete pods in the namespace "default"
α αΎαααΆααααΎαααΆα α’αααααααΎααααΆαα GitHub ααΆααα’αααα
αααα»αααααΆαααααααααΎαα’αΆα
ααΎαααΎαααααΆα αα·αα
αΌααα
αααα»ααα ααα»αααααα½ααααα·αααΆααα·αααα·ααααΆααααααΌααα½αααΆααα
ααααα: www.habr.com