密钥和证书

如果您怀疑 Istio 使用的某些密钥或证书不正确，那么第一步是确保 Citadel 健康。

然后，您可以验证 Citadel 是否实际生成密钥和证书：

  1. $ kubectl get secret istio.my-sa -n my-ns
  2. NAME                    TYPE                           DATA      AGE
  3. istio.my-sa             istio.io/key-and-cert          3         24d

其中 my-ns 和 my-sa 是您的 pod 运行的命名空间和 Service Account 。

如果要检查其他 Service Account 的密钥和证书，可以运行以下命令列出 Citadel为 其生成密钥和证书的所有的 secret：

  1. $ kubectl get secret --all-namespaces | grep istio.io/key-and-cert
  2. NAMESPACE      NAME                                                 TYPE                                  DATA      AGE
  3. .....
  4. istio-system   istio.istio-citadel-service-account                  istio.io/key-and-cert                 3         14d
  5. istio-system   istio.istio-cleanup-old-ca-service-account           istio.io/key-and-cert                 3         14d
  6. istio-system   istio.istio-egressgateway-service-account            istio.io/key-and-cert                 3         14d
  7. istio-system   istio.istio-ingressgateway-service-account           istio.io/key-and-cert                 3         14d
  8. istio-system   istio.istio-mixer-post-install-account               istio.io/key-and-cert                 3         14d
  9. istio-system   istio.istio-mixer-service-account                    istio.io/key-and-cert                 3         14d
  10. istio-system   istio.istio-pilot-service-account                    istio.io/key-and-cert                 3         14d
  11. istio-system   istio.istio-sidecar-injector-service-account         istio.io/key-and-cert                 3         14d
  12. istio-system   istio.prometheus                                     istio.io/key-and-cert                 3         14d
  13. kube-public    istio.default                                        istio.io/key-and-cert                 3         14d
  14. .....

然后检查证书是否有效：

  1. $ kubectl get secret -o json istio.my-sa -n my-ns | jq -r '.data["cert-chain.pem"]' | base64 --decode | openssl x509 -noout -text
  2. Certificate:
  3.     Data:
  4.         Version: 3 (0x2)
  5.         Serial Number:
  6.             99:59:6b:a2:5a:f4:20:f4:03:d7:f0:bc:59:f5:d8:40
  7.     Signature Algorithm: sha256WithRSAEncryption
  8.         Issuer: O = k8s.cluster.local
  9.         Validity
  10.             Not Before: Jun  4 20:38:20 2018 GMT
  11.             Not After : Sep  2 20:38:20 2018 GMT
  12.         Subject: O =
  13.         Subject Public Key Info:
  14.             Public Key Algorithm: rsaEncryption
  15.                 Public-Key: (2048 bit)
  16.                 Modulus:
  17.                     00:c8:a0:08:24:61:af:c1:cb:81:21:90:cc:03:76:
  18.                     01:25:bc:ff:ca:25:fc:81:d1:fa:b8:04:aa:d4:6b:
  19.                     55:e9:48:f2:e4:ab:22:78:03:47:26:bb:8f:22:10:
  20.                     66:47:47:c3:b2:9a:70:f1:12:f1:b3:de:d0:e9:2d:
  21.                     28:52:21:4b:04:33:fa:3d:92:8c:ab:7f:cc:74:c9:
  22.                     c4:68:86:b0:4f:03:1b:06:33:48:e3:5b:8f:01:48:
  23.                     6a:be:64:0e:01:f5:98:6f:57:e4:e7:b7:47:20:55:
  24.                     98:35:f9:99:54:cf:a9:58:1e:1b:5a:0a:63:ce:cd:
  25.                     ed:d3:a4:88:2b:00:ee:b0:af:e8:09:f8:a8:36:b8:
  26.                     55:32:80:21:8e:b5:19:c0:2f:e8:ca:4b:65:35:37:
  27.                     2f:f1:9e:6f:09:d4:e0:b1:3d:aa:5f:fe:25:1a:7b:
  28.                     d4:dd:fe:d1:d3:b6:3c:78:1d:3b:12:c2:66:bd:95:
  29.                     a8:3b:64:19:c0:51:05:9f:74:3d:6e:86:1e:20:f5:
  30.                     ed:3a:ab:44:8d:7c:5b:11:14:83:ee:6b:a1:12:2e:
  31.                     2a:0e:6b:be:02:ad:11:6a:ec:23:fe:55:d9:54:f3:
  32.                     5c:20:bc:ec:bf:a6:99:9b:7a:2e:71:10:92:51:a7:
  33.                     cb:79:af:b4:12:4e:26:03:ab:35:e2:5b:00:45:54:
  34.                     fe:91
  35.                 Exponent: 65537 (0x10001)
  36.         X509v3 extensions:
  37.             X509v3 Key Usage: critical
  38.                 Digital Signature, Key Encipherment
  39.             X509v3 Extended Key Usage:
  40.                 TLS Web Server Authentication, TLS Web Client Authentication
  41.             X509v3 Basic Constraints: critical
  42.                 CA:FALSE
  43.             X509v3 Subject Alternative Name:
  44.                 URI:spiffe://cluster.local/ns/my-ns/sa/my-sa
  45.     Signature Algorithm: sha256WithRSAEncryption
  46.          78:77:7f:83:cc:fc:f4:30:12:57:78:62:e9:e2:48:d6:ea:76:
  47.          69:99:02:e9:62:d2:53:db:2c:13:fe:0f:00:56:2b:83:ca:d3:
  48.          4c:d2:01:f6:08:af:01:f2:e2:3e:bb:af:a3:bf:95:97:aa:de:
  49.          1e:e6:51:8c:21:ee:52:f0:d3:af:9c:fd:f7:f9:59:16:da:40:
  50.          4d:53:db:47:bb:9c:25:1a:6e:34:41:42:d9:26:f7:3a:a6:90:
  51.          2d:82:42:97:08:f4:6b:16:84:d1:ad:e3:82:2c:ce:1c:d6:cd:
  52.          68:e6:b0:5e:b5:63:55:3e:f1:ff:e1:a0:42:cd:88:25:56:f7:
  53.          a8:88:a1:ec:53:f9:c1:2a:bb:5c:d7:f8:cb:0e:d9:f4:af:2e:
  54.          eb:85:60:89:b3:d0:32:60:b4:a8:a1:ee:f3:3a:61:60:11:da:
  55.          2d:7f:2d:35:ce:6e:d4:eb:5c:82:cf:5c:9a:02:c0:31:33:35:
  56.          51:2b:91:79:8a:92:50:d9:e0:58:0a:78:9d:59:f4:d3:39:21:
  57.          bb:b4:41:f9:f7:ec:ad:dd:76:be:28:58:c0:1f:e8:26:5a:9e:
  58.          7b:7f:14:a9:18:8d:61:d1:06:e3:9e:0f:05:9e:1b:66:0c:66:
  59.          d1:27:13:6d:ab:59:46:00:77:6e:25:f6:e8:41:ef:49:58:73:
  60.          b4:93:04:46

确保显示的证书包含有效信息。特别是，Subject Alternative Name 字段应为 URI:spiffe://cluster.local/ns/my-ns/sa/my-sa。如果不是这种情况，您的 Citadel 可能会出现问题。尝试重新部署 Citadel 并再次检查。

最后，您可以验证密钥和证书是否由 sidecar 代理正确安装在 /etc/certs 目录中。您可以使用此命令检查：

  1. $ kubectl exec -it my-pod-id -c istio-proxy -- ls /etc/certs
  2. cert-chain.pem    key.pem    root-cert.pem

（可选）您可以使用以下命令检查其内容：

  1. $ kubectl exec -it my-pod-id -c istio-proxy -- cat /etc/certs/cert-chain.pem | openssl x509 -text -noout
  2. Certificate:
  3.     Data:
  4.         Version: 3 (0x2)
  5.         Serial Number:
  6.             7e:b4:44:fe:d0:46:ba:27:47:5a:50:c8:f0:8e:8b:da
  7.     Signature Algorithm: sha256WithRSAEncryption
  8.         Issuer: O = k8s.cluster.local
  9.         Validity
  10.             Not Before: Jul 13 01:23:13 2018 GMT
  11.             Not After : Oct 11 01:23:13 2018 GMT
  12.         Subject: O =
  13.         Subject Public Key Info:
  14.             Public Key Algorithm: rsaEncryption
  15.                 Public-Key: (2048 bit)
  16.                 Modulus:
  17.                     00:bb:c9:cd:f4:b8:b5:e4:3b:f2:35:aa:4c:67:cc:
  18.                     1b:a9:30:c4:b7:fd:0a:f5:ac:94:05:b5:82:96:b2:
  19.                     c8:98:85:f9:fc:09:b3:28:34:5e:79:7e:a9:3c:58:
  20.                     0a:14:43:c1:f4:d7:b8:76:ab:4e:1c:89:26:e8:55:
  21.                     cd:13:6b:45:e9:f1:67:e1:9b:69:46:b4:7e:8c:aa:
  22.                     fd:70:de:21:15:4f:f5:f3:0f:b7:d4:c6:b5:9d:56:
  23.                     ef:8a:91:d7:16:fa:db:6e:4c:24:71:1c:9c:f3:d9:
  24.                     4b:83:f1:dd:98:5b:63:5c:98:5e:2f:15:29:0f:78:
  25.                     31:04:bc:1d:c8:78:c3:53:4f:26:b2:61:86:53:39:
  26.                     0a:3b:72:3e:3d:0d:22:61:d6:16:72:5d:64:e3:78:
  27.                     c8:23:9d:73:17:07:5a:6b:79:75:91:ce:71:4b:77:
  28.                     c5:1f:60:f1:da:ca:aa:85:56:5c:13:90:23:02:20:
  29.                     12:66:3f:8f:58:b8:aa:72:9d:36:f1:f3:b7:2b:2d:
  30.                     3e:bb:7c:f9:b5:44:b9:57:cf:fc:2f:4b:3c:e6:ee:
  31.                     51:ba:23:be:09:7b:e2:02:6a:6e:e7:83:06:cd:6c:
  32.                     be:7a:90:f1:1f:2c:6d:12:9e:2f:0f:e4:8c:5f:31:
  33.                     b1:a2:fa:0b:71:fa:e1:6a:4a:0f:52:16:b4:11:73:
  34.                     65:d9
  35.                 Exponent: 65537 (0x10001)
  36.         X509v3 extensions:
  37.             X509v3 Key Usage: critical
  38.                 Digital Signature, Key Encipherment
  39.             X509v3 Extended Key Usage:
  40.                 TLS Web Server Authentication, TLS Web Client Authentication
  41.             X509v3 Basic Constraints: critical
  42.                 CA:FALSE
  43.             X509v3 Subject Alternative Name:
  44.                 URI:spiffe://cluster.local/ns/default/sa/bookinfo-productpage
  45.     Signature Algorithm: sha256WithRSAEncryption
  46.          8f:be:af:a4:ee:f7:be:21:e9:c8:c9:e2:3b:d3:ac:41:18:5d:
  47.          f8:9a:85:0f:98:f3:35:af:b7:e1:2d:58:5a:e0:50:70:98:cc:
  48.          75:f6:2e:55:25:ed:66:e7:a4:b9:4a:aa:23:3b:a6:ee:86:63:
  49.          9f:d8:f9:97:73:07:10:25:59:cc:d9:01:09:12:f9:ab:9e:54:
  50.          24:8a:29:38:74:3a:98:40:87:67:e4:96:d0:e6:c7:2d:59:3d:
  51.          d3:ea:dd:6e:40:5f:63:bf:30:60:c1:85:16:83:66:66:0b:6a:
  52.          f5:ab:60:7e:f5:3b:44:c6:11:5b:a1:99:0c:bd:53:b3:a7:cc:
  53.          e2:4b:bd:10:eb:fb:f0:b0:e5:42:a4:b2:ab:0c:27:c8:c1:4c:
  54.          5b:b5:1b:93:25:9a:09:45:7c:28:31:13:a3:57:1c:63:86:5a:
  55.          55:ed:14:29:db:81:e3:34:47:14:ba:52:d6:3c:3d:3b:51:50:
  56.          89:a9:db:17:e4:c4:57:ec:f8:22:98:b7:e7:aa:8a:72:28:9a:
  57.          a7:27:75:60:85:20:17:1d:30:df:78:40:74:ea:bc:ce:7b:e5:
  58.          a5:57:32:da:6d:f2:64:fb:28:94:7d:28:37:6f:3c:97:0e:9c:
  59.          0c:33:42:f0:b6:f5:1c:0d:fb:70:65:aa:93:3e:ca:0e:58:ec:
  60.          8e:d5:d0:1e