question Re: Issue with NameNode startup after enabling SSL in Archives of Support Questions (Read Only)

Issue with NameNode startup after enabling SSL

m3l8 — Fri, 16 Sep 2022 11:03:42 GMT

I'm setting up a 4 node HDP 2.5 cluster with a requirement to encrypt all data in transit. I've been following the documentation from here: https://docs.hortonworks.com/HDPDocuments/HDP2/HDP-2.5.0/bk_security/content/ch_hdp-security-guide-wire-encryption.html

I am using a certificate signed by my company's Issuing CA. The following is in my server.keystore.jks (sensitive bits masked)

<server's FQDN>, Feb 10, 2017, PrivateKeyEntry, 
Certificate fingerprint (SHA1): B6:DA:29:57:27:10:D3:97:8D:CD:49:6C:87:82:9F:64:DD:XX:XX:XX 
<company> issuing ca, Feb 10, 2017, trustedCertEntry, 
Certificate fingerprint (SHA1): F7:20:77:9E:08:4F:20:2E:E6:8C:78:5D:EA:39:91:6F:D7:XX:XX:XX 
<company> root ca, Feb 10, 2017, trustedCertEntry, 
Certificate fingerprint (SHA1): 8D:4A:EA:A6:43:71:83:FE:44:FA:E5:04:D7:E3:5B:3A:45:XX:XX:XX

After configuring the system to use the keys and restarting the HDFS service in Ambari, I can get the DataNode to start up. When the NameNode starts up, the service comes up but then it does a check using curl. The following error shows up in the error log:

resource_management.core.exceptions.Fail: Execution of 'curl -sS -L -w '%{http_code}' -X GET -k 'https://<server's FQDN>:50470/webhdfs/v1/tmp?op=GETFILESTATUS&user.name=hdfs' 1>/tmp/tmpiWgx4l 2>/tmp/tmpHLEISr' returned 35.
curl: (35) NSS: client certificate not found (nickname not specified)
000

I get the same result if I try to run the same command on the command line. In addition, if I try to access the same URL from Chrome, I'm getting ERR_BAD_SSL_CLIENT_AUTH_CERT back. I don't have a lot of experience setting up SSL/TLS and am pretty much stuck at this point. Any help would be greatly appreciated.

Thanks,

Mike

Re: Issue with NameNode startup after enabling SSL

apappu — Sat, 11 Feb 2017 05:52:20 GMT

@Michael Locatelli

You will have to disable the client auth at HDFS side.

set hadoop.ssl.require.client.cert=false and restart the services.

You can follow the article that I have published some time back at https://community.hortonworks.com/articles/52875/enable-https-for-hdfs.html

Re: Issue with NameNode startup after enabling SSL

m3l8 — Sat, 11 Feb 2017 05:54:53 GMT

hadoop.ssl.require.client.cert is already set to false in core-site.xml is already set to false

Re: Issue with NameNode startup after enabling SSL

apappu — Sat, 11 Feb 2017 05:58:05 GMT

@Michael Locatelli

In keystore files have only corresponding cert - remove truststore certs and other stuff, since we are not defining any alias name in the configurations.

Ex: Correct keystore file should look alike if i list it like,

keytool -list -keystore skeystore.jks

-------------

Keystore type: JKS Keystore provider: SUN Your keystore contains 1 entry apappu.hdp.com, Nov 16, 2016, PrivateKeyEntry, Certificate fingerprint (SHA1): 50:2B:EF:1F:58:07:C3:0A:C6:29:B8:49:7B:98:1B:DD:A0:A8:33:A9

-------------

If you observe in the outout - there is no trustedCertEntry.

Re: Issue with NameNode startup after enabling SSL

m3l8 — Sat, 11 Feb 2017 06:18:43 GMT

@apappu Going through your article you linked, I found the issue. dfs.client.https.need-auth was set to true in hdfs-site.xml. The error cleared after that and NameNode came up with a valid SSL certificate! You just made my Friday 🙂

Re: Issue with NameNode startup after enabling SSL

apappu — Sat, 11 Feb 2017 06:26:13 GMT

@Michael Locatelli

thats good to hear , feel free to add me for any SSL issues.