Hadoop集群之开启kerberos安全认证

1.KDC节点

KDC节点上需要安装krb5-server、krb5-libs、krb5-auth-dialog、krb5-workstation服务，Client单独部署在其他节点

yum install krb5-server krb5-libs krb5-auth-dialog krb5-workstation -y

2.Client节点

Client节点上部署krb5-devel、krb5-workstation服务

yum install krb5-devel krb5-workstation -y

3.配置KDC服务器上Kerberos相关文件

3.1配置/etc/krb5.conf

修改其中的realm，把默认的EXAMPLE.COM修改为自己要定义的值，也可以不修改。

default_realm：默认的realm。设置为realm。如ZHUZI.COM# Configuration snippets may be placed in this directory as well
includedir /etc/krb5.conf.d/[logging]default = FILE:/var/log/krb5libs.logkdc = FILE:/var/log/krb5kdc.logadmin_server = FILE:/var/log/kadmind.log[libdefaults]dns_lookup_realm = falseticket_lifetime = 24hrenew_lifetime = 7dforwardable = truerdns = falsepkinit_anchors = FILE:/etc/pki/tls/certs/ca-bundle.crtdefault_realm = EXAMPLE.COMdefault_ccache_name = KEYRING:persistent:%{uid}[realms]EXAMPLE.COM = {kdc = nyyjh1admin_server = nyyjh1}[domain_realm]
# .example.com = EXAMPLE.COM
# example.com = EXAMPLE.COM

kdc：代表要kdc的位置。添加格式是机器名

admin_server:代表admin的位置。格式是机器名

default_domain：代表默认的域名。（设置Master主机所对应的域名，如master162.ispeco.com）

[kdcdefaults]

3.2配置/var/kerberos/krb5kdc/kdc.conf

 kdc_ports = 88kdc_tcp_ports = 88[realms]EXAMPLE.COM = {#master_key_type = aes256-ctsacl_file = /var/kerberos/krb5kdc/kadm5.acldict_file = /usr/share/dict/wordsadmin_keytab = /var/kerberos/krb5kdc/kadm5.keytabsupported_enctypes = aes256-cts:normal aes128-cts:normal des3-hmac-sha1:normal arcfour-hmac:normal camellia256-cts:normal camellia128-cts:normal des-hmac-sha1:normal des-cbc-md5:normal des-cbc-crc:normal}

3.3配置/var/kerberos/krb5kdc/kadm5.acl

*/admin@EXAMPLE.COM     *

注意：

1. krb5.conf (Master、Worker节点均需配置，且文件内容必须相同)

2. kdc.conf (仅配置Master节点，如果没有，需自建)

3. kadm5.acl (Master节点配置)

4.创建 Kerberos数据库

创建Kerberos数据库，需要设置管理员密码，创建成功后会在/var/Kerberos/krb5kdc/下生成一系列文件，

如果重新创建，需要先删除/var/kerberos/krb5kdc下面principal相关文件。

cd /var/kerberos/krb5kdc/
rm principal* -rf

需在Master节点的root用户下执行以下命令新建数据库：

kdb5_util create -s -r EXAMPLE.COM
service krb5kdc start
service kadmin start

5.创建 kerberos的管理员

在Master节点的root用户下分别执行以下命令：

kadmin.local
addprinc admin/admin@EXAMPLE.COM