Clever Geek Handbook

Cert-manager 1.0 lançado

Se você perguntar a um engenheiro experiente e sábio o que ele pensa do cert-manager e por que todo mundo o usa, o especialista suspirará, abraçará com segurança e dirá com cansaço: “Todo mundo usa, porque não existem alternativas sãs. Nossos ratos choram, picam, mas continuam a viver com este cacto. Por que amamos? Porque funciona. Por que não amamos? Porque novas versões são lançadas constantemente e usam novos recursos. E você tem que atualizar o cluster repetidamente. E as versões antigas param de funcionar, porque uma conspiração também é um grande xamanismo misterioso. "

Mas os desenvolvedores afirmam que tudo vai mudar com o cert-manager 1.0 .



Vamos acreditar?

Cert-manager - «» Kubernetes. : Let's Encrypt, HashiCorp Vault, Venafi, . , . Cert-manager kube-lego, , kube-cert-manager.

1.0 cert-manager. , - . , Kubernetes, . 16 . , - . API . 1500 GitHub 253 .

1.0 , cert-manager - . API v1.

, cert-manager ! 1.0 .

1.0 - :

  • v1 API;

  • kubectl cert-manager status, ;

  • API Kubernetes;

  • ;

  • ACME.

.

API v1

v0.16 API v1beta1. , API. 1.0 API v1. API , , API v1 .

(: ):

:

  • emailSANs emailAddresses

  • uriSANs - uris

SAN (subject alt names, . ), Go API. API.

Kubernetes 1.16+ - webhooks API v1alpha2, v1alpha3, v1beta1 v1. API . API v1, . legacy cert-manager - v1, .

kubectl cert-manager status

C kubectl , . kubectl cert-manager status , , .

kubectl cert-manager status certificate <->, , CertificateRequest, Secret, Issuer, Order Challenges ACME.

:

$ kubectl cert-manager status certificate acme-certificate

Name: acme-certificate
Namespace: default
Created at: 2020-08-21T16:44:13+02:00
Conditions:
  Ready: False, Reason: DoesNotExist, Message: Issuing certificate as Secret does not exist
  Issuing: True, Reason: DoesNotExist, Message: Issuing certificate as Secret does not exist
DNS Names:
- example.com
Events:
  Type    Reason     Age   From          Message
  ----    ------     ----  ----          -------
  Normal  Issuing    18m   cert-manager  Issuing certificate as Secret does not exist
  Normal  Generated  18m   cert-manager  Stored new private key in temporary Secret resource "acme-certificate-tr8b2"
  Normal  Requested  18m   cert-manager  Created new CertificateRequest resource "acme-certificate-qp5dm"
Issuer:
  Name: acme-issuer
  Kind: Issuer
  Conditions:
    Ready: True, Reason: ACMEAccountRegistered, Message: The ACME account was registered with the ACME server
error when finding Secret "acme-tls": secrets "acme-tls" not found
Not Before: <none>
Not After: <none>
Renewal Time: <none>
CertificateRequest:
  Name: acme-certificate-qp5dm
  Namespace: default
  Conditions:
    Ready: False, Reason: Pending, Message: Waiting on certificate issuance from order default/acme-certificate-qp5dm-1319513028: "pending"
  Events:
    Type    Reason        Age   From          Message
    ----    ------        ----  ----          -------
    Normal  OrderCreated  18m   cert-manager  Created Order resource default/acme-certificate-qp5dm-1319513028
Order:
  Name: acme-certificate-qp5dm-1319513028
  State: pending, Reason:
  Authorizations:
    URL: https://acme-staging-v02.api.letsencrypt.org/acme/authz-v3/97777571, Identifier: example.com, Initial State: pending, Wildcard: false
Challenges:
- Name: acme-certificate-qp5dm-1319513028-1825664779, Type: DNS-01, Token: J-lOZ39yNDQLZTtP_ZyrYojDqjutMAJOxCL1AkOEZWw, Key: U_W3gGV2KWgIUonlO2me3rvvEOTrfTb-L5s0V1TJMCw, State: pending, Reason: error getting clouddns service account: secret "clouddns-accoun" not found, Processing: true, Presented: false

. , Letsencrypt:

$ kubectl cert-manager status certificate example
Name: example
[...]
Secret:
  Name: example
  Issuer Country: US
  Issuer Organisation: Let's Encrypt
  Issuer Common Name: Let's Encrypt Authority X3
  Key Usage: Digital Signature, Key Encipherment
  Extended Key Usages: Server Authentication, Client Authentication
  Public Key Algorithm: RSA
  Signature Algorithm: SHA256-RSA
  Subject Key ID: 65081d98a9870764590829b88c53240571997862
  Authority Key ID: a84a6a63047dddbae6d139b7a64565eff3a8eca1
  Serial Number: 0462ffaa887ea17797e0057ca81d7ba2a6fb
  Events:  <none>
Not Before: 2020-06-02T04:29:56+02:00
Not After: 2020-08-31T04:29:56+02:00
Renewal Time: 2020-08-01T04:29:56+02:00
[...]

API Kubernetes

Cert-manager , Kubernetes CRDs. , Kubernetes 1.11, , apiextensions.k8s.io/v1beta1 CRD, admissionregistration.k8s.io/v1beta1 webhooks. Kubernetes 1.22. 1.0 apiextensions.k8s.io/v1 admissionregistration.k8s.io/v1 Kubernetes 1.16 ( ) . v1beta1 legacy .

klog/v2, Kubernetes 1.19. , , . Kubernetes. ( - , . ) , Error ( 0), , Trace ( 5), , . , cert-manager.

: - cert-manager 2 (Info), global.logLevel Helm chart.

: - . .



N.B. : , Kubernetes, -, , - Kubernetes , 28-30 , Kubernetes , 14–16 .

ACME

cert-manager Let's Encrypt ACME. 1.0 , ACME issuer.

ACME , , . cert-manager , privateKeySecretRef. , cert-manager , . disableAccountKeyGeneration, , true - cert-manager , .

apiVersion: cert-manager.io/v1
kind: Issuer
metadata:
  name: letsencrypt
spec:
  acme:
    privateKeySecretRef:
      name: example-issuer-account-key
    disableAccountKeyGeneration: false

29 Let's Encrypt ISRG Root. Identrust. cert-manager, , , CA.

Let's Encrypt CA « » ACME. cert-manager issuer. preferredChain CA, . CA, , . , , - -. , ACME issuer.

, ISRG Root, :

apiVersion: cert-manager.io/v1
kind: Issuer
metadata:
  name: letsencrypt
spec:
  acme:
    server: https://acme-v02.api.letsencrypt.org/directory
    preferredChain: "ISRG Root X1"

IdenTrust - DST Root CA X3:

apiVersion: cert-manager.io/v1
kind: Issuer
metadata:
  name: letsencrypt
spec:
  acme:
    server: https://acme-v02.api.letsencrypt.org/directory
    preferredChain: "DST Root CA X3"

, , Let's Encrypt 29 2021 .



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