问题描述
如何在不更改源代码的情况下重置默认的Cassandra凭据?
How to reset default Cassandra credentials without changing source code?
我已经检查了类似的问题,例如如何重设丢失的邮件Cassandra管理员用户的密码?. 我有Datastax Cassandra 2.0.8的三个节点群集,我正在尝试实现身份验证.我已经在所有节点中设置了cassandra.yaml并重新启动了它们.问题是我仍然无法登录cqlsh.
I have check similar problems like How to reset a lost Cassandra admin user's password?. I have three node cluster of Datastax Cassandra 2.0.8 and I am trying to implement authentication. I have set cassandra.yaml in all nodes and restarted them. Problem is that I still cannot login in to cqlsh.
我还试图在cqlsh中为cassandra用户重置密码(我已为此禁用身份验证):
I have also tried to reset password for cassandra user in cqlsh(I have disabled authentication for that):
update system_auth.credentials set salted_hash='$2a$10$vbfmLdkQdUz3Rmw.fF7Ygu6GuphqHndpJKTvElqAciUJ4SZ3pwquu' where username='cassandra';
在日志中,有关于创建cassandra超级用户的信息.我已经检查了键空间system_auth,它包括凭据,权限和用户.凭证列系列确实包含用户cassandra:
In logs there is Info about creating cassandra superuser. I have checked keyspace system_auth and it includes credentials,permissions and users. And credentials column family does contain user cassandra:
cqlsh> use system_auth;
cqlsh:system_auth> select * from credentials;
username | options | salted_hash
-----------+---------+---------------------------------------------------------- ----
cassandra | null | $2a$10$vbfmLdkQdUz3Rmw.fF7Ygu6GuphqHndpJKTvElqAciUJ4SZ3pw quu
(1 rows)
但是,当我尝试时:
./cqlsh -u cassandra -p cassandra
出现异常,该用户不存在,但是我没有创建该用户的权限.
I get exception, that user does not exists, but I dont have permissions to create one.
cql.cassandra.ttypes.AuthenticationException: AuthenticationException(why="User cassandra doesn't exist - create it with CREATE USER query first")
推荐答案
我不确定,但是您上面使用的哈希很可能会随每个版本而变化,并且可能特定于特定版本的卡桑德拉.考虑到这一点,您可以(理论上)在VM中安装相同的版本,然后在该计算机的system_auth.credentials
中查询cassandra用户的salted_hash
.如果不是您上面链接的问题,我永远也不会想尝试过.
I don't know for sure, but there's a good chance that the hash you used above changes with each version, and may be particular to a specific version of Cassandra. With that in-mind, you could (in-theory) install the same version in a VM, and then query that machine's system_auth.credentials
for the cassandra user's salted_hash
. Had it not been for the question you linked above, I never would have thought to try that.
否则,该下一个选项将起作用.
Otherwise, this next option WILL work.
- 停止您的Cassandra群集.
-
在每个节点上,
cd
向下到您的data
目录,并执行:
- Stop your Cassandra cluster.
On each node,
cd
down to yourdata
directory, and execute:
$ mv system_auth system_auth_20140814
重新启动每个节点.
只要仍将身份验证器(在您的cassandra.yaml中)设置为使用PasswordAuthenticator
,Cassandra就会使用默认的Cassandra超级用户重建system_auth
密钥空间,您可以将其与cqlsh
一起使用以回来.
As long as the authenticator is still set (in your cassandra.yaml) to use the PasswordAuthenticator
, Cassandra will rebuild the system_auth
keyspace, with the default Cassandra super user, which you can use with cqlsh
to get back in.
$ ./cqlsh -u cassandra -p cassandra
Connected to MyCluster at 127.0.0.1:9042.
[cqlsh 5.0.1 | Cassandra 2.1.0-rc5-SNAPSHOT | CQL spec 3.2.0 | Native protocol v3]
Use HELP for help.
cqlsh>
注意:
- 您将必须重新添加所有用户,并重新应用所有用户的权限.
- 除了重命名(c6)目录(
mv
),还可以将其删除(c10). - 您将必须将适当的复制设置重新应用于您的
system_auth
键空间.默认情况下,system_auth
仅具有1的复制因子.
- You will have to re-add all of your users, and re-apply all off their permissions.
- Instead of renaming (
mv
) thesystem_auth
directory, you could also just delete it (rm
). - You will have to re-apply the appropriate replication settings to your
system_auth
keyspace. By default,system_auth
only has a replication factor of 1.
这篇关于当Cassandra不知道"cassandra"默认用户时,如何重置Cassandra超级用户?的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!