Greenplum安全

身份认证

一、Handles  the  user  anthentication
二、The file is  located in $MASTER_DATA_DIRECTORY
三、Comments  are ignored
四、File is read line by  line 
五、First  matching  line is used 
六、All  subsequent lines are ignored
七、Pessimistic - if no grants,then deny access
八、To be able to access to a Greenplum database from a distant host,the couple role/host  has to be set in the configuration file pg_hba.conf

pg_hba.conf配置链接类型

Type of connection:
local : Connection is coming in over the Unix Domain Socket
host : Connection over the network ,encryption is optional
hostssl : Connection over the network ,encryption is enforced
hostnossl: Connection over the network ,no encrytion

pg_hba.conf配置链接数据库

Name of database:
一、Database name, or list of database names separated by comma
二、‘all’ for all databases
三、@followed by filename : file containing  databases , one per line

pg_hba.conf配置链接用户

Name of the user:
一、Role name,or list of role names separated by comma
二、‘all’ for all roles
三、@followed by filename,file containing role names, one per line
四、+role name: a group where access is granted all members of this group

pg_hba.conf配置链接网络地址

Network address
一、only for host ,hostssl and hostnossl(1st   column)
二、Network address might be  an IPv2 or IPv6 address


CIDR-Address	IP-Address + IP-Mask	Comment
192.107.2.89/32	192.107.2.89  255.255.255.255	Single network
192.107.2.0/24	192.107.2.0  255.255.255.0	Small  network
192.107.0.0/16	192.107.0.0  255.255.0.0	Large  network
0.0.0.0/0	0.0.0.0      0.0.0.0  	Full   network

pg_hba.conf配置用户的认证方法

Authentication method:
trust : 该模式能够不用密码直接链接数据库，不安全，通常用于集群内部局域网内
reject：该模式表示拒绝全部请求
md5 : 该模式较经常使用，发送以前使用md5算法加密的密码
password : 该模式是使用明文密码进行身份认证
ldap : 使用LDAP服务器认证
gss : 用GSSAPI和Kerberos认证用户，只对TCP/IP连接可用
pam: 使用操做系统提供的可插入认证模块服务(PAM)认证
redius:用RADIUS服务器认证
cert : 使用SSL客户端证书认证
Ident: 经过获取客户端的操做系统用户名，检查是否与被访问的数据库用户名匹配

来自 https://github.com/xfg0218/greenplum--summarize/tree/master/202009/greenplum%E5%A4%87%E4%BB%BD%E5%AE%89%E5%85%A8%E4%B8%8E%E9%AB%98%E5%8F%AF%E7%94%A8 加密