62eefdb57e
### _Why are the changes needed?_ - Prefer `https://` URLs in docs, and all changed URLs are validated. ### _How was this patch tested?_ - [ ] Add some test cases that check the changes thoroughly including negative and positive cases if possible - [ ] Add screenshots for manual tests if appropriate - [x] [Run test](https://kyuubi.readthedocs.io/en/master/develop_tools/testing.html#running-tests) locally before make a pull request Closes #4235 from bowenliang123/https-link. Closes #4235 f114dde2 [liangbowen] update AllKyuubiConfiguration ad8aaedf [liangbowen] style e973be5a [liangbowen] update 2370f4bf [liangbowen] prefer https URLs in docs Authored-by: liangbowen <liangbowen@gf.com.cn> Signed-off-by: liangbowen <liangbowen@gf.com.cn>
109 lines
5.9 KiB
Markdown
109 lines
5.9 KiB
Markdown
<!--
|
|
- Licensed to the Apache Software Foundation (ASF) under one or more
|
|
- contributor license agreements. See the NOTICE file distributed with
|
|
- this work for additional information regarding copyright ownership.
|
|
- The ASF licenses this file to You under the Apache License, Version 2.0
|
|
- (the "License"); you may not use this file except in compliance with
|
|
- the License. You may obtain a copy of the License at
|
|
-
|
|
- http://www.apache.org/licenses/LICENSE-2.0
|
|
-
|
|
- Unless required by applicable law or agreed to in writing, software
|
|
- distributed under the License is distributed on an "AS IS" BASIS,
|
|
- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
- See the License for the specific language governing permissions and
|
|
- limitations under the License.
|
|
-->
|
|
|
|
# Kinit Auxiliary Service
|
|
|
|
Kinit auxiliary service is a critical service both for authentication between Kyuubi client/server
|
|
and for authentication between Kyuubi server/Hadoop cluster in a Kerberos environment.
|
|
It will get a Kerberos Ticket Cache from KDC and periodically re-kinit to keep the Ticket Cache fresh.
|
|
|
|
**Note**:
|
|
- Kinit auxiliary service is critical to Kyuubi Kerberos authentication, but not vice versa.
|
|
- Kinit auxiliary service can also work with other authentication mode.
|
|
|
|
## Installing and Configuring the Kerberos Clients
|
|
|
|
Usually, Kerberos client is installed as default. You can validate it using `klist` tool.
|
|
|
|
```bash
|
|
$ klist -V
|
|
Kerberos 5 version 1.15.1
|
|
```
|
|
|
|
If the client is not installed, you should install it ahead based on the OS platform that you prepare to run Kyuubi.
|
|
|
|
`krb5.conf` is a configuration file for tuning up the creation of Kerberos ticket cache.
|
|
The default location is `/etc` on Linux,
|
|
and we can use `KRB5_CONFIG` environmental variable to overwrite the location of the configuration file.
|
|
|
|
Replace or configure `krb5.conf` to point to the KDC.
|
|
|
|
## Kerberos Ticket
|
|
|
|
Kerberos client is aimed to generate a Ticket Cache file.
|
|
Then, Kyuubi can use this Ticket Cache to authenticate with those kerberized services,
|
|
e.g. HDFS, YARN, and Hive Metastore server, etc.
|
|
|
|
A Kerberos ticket cache contains a service and a client principal names,
|
|
lifetime indicators, flags, and the credential itself, e.g.
|
|
|
|
```bash
|
|
$ klist
|
|
|
|
Ticket cache: FILE:/tmp/krb5cc_5441
|
|
Default principal: spark/kyuubi.host.name@KYUUBI.APACHE.ORG
|
|
|
|
Valid starting Expires Service principal
|
|
2020-11-25T13:17:18 2020-11-26T13:17:18 krbtgt/KYUUBI.APACHE.ORG@KYUUBI.APACHE.ORG
|
|
renew until 2020-12-02T13:17:18
|
|
```
|
|
|
|
Kerberos credentials can be stored in Kerberos ticket cache.
|
|
For example, `/tmp/krb5cc_5441` in the above case.
|
|
|
|
They are valid for relatively short period. So, we always need to refresh it for long-running services like Kyuubi.
|
|
|
|
## Configurations
|
|
|
|
| Key | Default | Meaning | Since |
|
|
|----------------------------------------|--------------------------------------------------------------------------------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|--------------------------------------|
|
|
| <code>kyuubi.kinit.principal</code> | <div style='width: 80pt;word-wrap: break-word;white-space: normal'><undefined></div> | <div style='width: 200pt;word-wrap: break-word;white-space: normal'>Name of the Kerberos principal.</div> | <div style='width: 20pt'>1.0.0</div> |
|
|
| <code>kyuubi.kinit.keytab</code> | <div style='width: 80pt;word-wrap: break-word;white-space: normal'><undefined></div> | <div style='width: 200pt;word-wrap: break-word;white-space: normal'>Location of Kyuubi server's keytab.</div> | <div style='width: 20pt'>1.0.0</div> |
|
|
| <code>kyuubi.kinit.interval</code> | <div style='width: 80pt;word-wrap: break-word;white-space: normal'>PT1H</div> | <div style='width: 200pt;word-wrap: break-word;white-space: normal'>How often will Kyuubi server run `kinit -kt [keytab] [principal]` to renew the local Kerberos credentials cache</div> | <div style='width: 20pt'>1.0.0</div> |
|
|
| <code>kyuubi.kinit.max.attempts</code> | <div style='width: 80pt;word-wrap: break-word;white-space: normal'>10</div> | <div style='width: 200pt;word-wrap: break-word;white-space: normal'>How many times will `kinit` process retry</div> | <div style='width: 20pt'>1.0.0</div> |
|
|
|
|
When working with a Kerberos-enabled Hadoop cluster, we should ensure that `hadoop.security.authentication`
|
|
is set to `KERBEROS` in `$HADOOP_CONF_DIR/core-site.xml` or `$KYUUBI_HOME/conf/kyuubi-defaults.conf`.
|
|
Then we need to specify `kyuubi.kinit.principal` and `kyuubi.kinit.keytab` for authentication.
|
|
|
|
For example,
|
|
|
|
```bash
|
|
kyuubi.kinit.principal=spark/kyuubi.apache.org@KYUUBI.APACHE.ORG
|
|
kyuubi.kinit.keytab=/path/to/kyuuib.keytab
|
|
```
|
|
|
|
**Note**:
|
|
`kyuubi.kinit.principal` must be in the format: `<user>/<host>@<realm>`, and `<host>` must
|
|
be a FQDN of the host Kyuubi is running.
|
|
|
|
Kyuubi will use this `principal` to impersonate client users,
|
|
so the cluster should enable it to do impersonation for some particular user from some particular hosts.
|
|
|
|
For example,
|
|
|
|
```bash
|
|
hadoop.proxyuser.<user name in principal>.groups *
|
|
hadoop.proxyuser.<user name in principal>.hosts *
|
|
```
|
|
|
|
## Further Readings
|
|
|
|
- [Hadoop in Secure Mode](https://hadoop.apache.org/docs/current/hadoop-project-dist/hadoop-common/SecureMode.html)
|
|
- [Use Kerberos for authentication in Spark](https://spark.apache.org/docs/latest/security.html#kerberos)
|
|
|