集群用户权限控制
（一）OpenLdap 服务端安装与配置
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安装OpenLdap服务端(管理节点)
yum -y install openldap openldap-servers openldap-clients migrationtools -
OpenLdap 服务初始化
sed -i -e 's/olcSuffix:.*/olcSuffix: dc=example,dc=edu/g' /etc/openldap/slapd.d/cn\=config/olcDatabase\=\{2\}hdb.ldif sed -i -e 's/olcRootDN:.*/olcRootDN: cn=admin,dc=example,dc=edu/g' /etc/openldap/slapd.d/cn\=config/olcDatabase\=\{2\}hdb.ldif echo 'olcRootPw: PASSWORD@EDU' >> /etc/openldap/slapd.d/cn\=config/olcDatabase\=\{2\}hdb.ldif sed -i -e 's/dn.base="cn=.*"/dn.base="cn=admin,dc=example,dc=edu"/g' /etc/openldap/slapd.d/cn\=config/olcDatabase\=\{1\}monitor.ldif cp /usr/share/openldap-servers/DB_CONFIG.example /var/lib/ldap/DB_CONFIG chown -R ldap.ldap /var/lib/ldap LDAP 超级管理员为 cn=admin,dc=example,dc=edu 密码为：PASSWORD@EDU systemctl restart slapd systemctl enable slapd cd /etc/openldap/schema/ find . -name '*.ldif' -exec ldapadd -Y EXTERNAL -H ldapi:/// -D "cn=config" -f {} \; cd /usr/share/migrationtools/ sed -i -e 's/"ou=Group"/"ou=Groups"/g' migrate_common.ph sed -i -e 's/$DEFAULT_MAIL_DOMAIN = .*/$DEFAULT_MAIL_DOMAIN = "example.edu.cn";/g' migrate_common.ph sed -i -e 's/$DEFAULT_BASE = .*/$DEFAULT_BASE = "dc=example,dc=edu";/g' migrate_common.ph sed -i -e 's/$EXTENDED_SCHEMA = 0;/$EXTENDED_SCHEMA = 1;/g' migrate_common.ph ./migrate_base.pl > /root/base.ldif ldapadd -x -w PASSWORD@EDU -D "cn=admin,dc=example,dc=edu" -f /root/base.ldif -
生成系统用户、用户组 ldif
tail -n 5 /etc/passwd > system tail -n 10 /etc/group > group /usr/share/migrationtools/migrate_passwd.pl system people.ldif /usr/share/migrationtools/migrate_group.pl group group.ldif ldapadd -x -w PASSWORD@EDU -D "cn=admin,dc=example,dc=edu" -f /root/people.ldif ldapadd -x -w PASSWORD@EDU -D "cn=admin,dc=example,dc=edu" -f /root/group.ldif -
添加密码策略模块
vim addmodule.ldif dn: cn=module,cn=config cn: module objectClass: olcModuleList olcModulePath: /usr/lib64/openldap olcModuleLoad: ppolicy.la ldapadd -Y EXTERNAL -Q -H ldapi:/// -f addmodule.ldif -
添加访问权限
vim addAccess.ldif dn: olcDatabase={2}hdb,cn=config changetype: modify replace: olcAccess olcAccess: {0}to attrs=userPassword,shadowLastChange by self write by dn="cn=default,ou=pwpolicies,dc=example,dc=edu" write by anonymous auth by * read olcAccess: {1}to * by self write by dn="cn=default,ou=pwpolicies,dc=example,dc=edu" write by * read ldapadd -Y EXTERNAL -Q -H ldapi:/// -f addAccess.ldif -
添加策略重写
vim overlay.ldif dn: olcOverlay=ppolicy,olcDatabase={2}hdb,cn=config objectClass: olcPPolicyConfig olcOverlay: ppolicy olcPPolicyDefault: cn=default,ou=policy,dc=example,dc=edu olcPPolicyHashCleartext: True olcPPolicyUseLockout: True olcPPolicyForwardUpdates: FALSE structuralobjectClass: olcPPolicyConfig creatorsName: cn=config ldapadd -Y EXTERNAL -Q -H ldapi:/// -f overlay.ldif -
配置SSL
cd /etc/openldap/cacerts #生成证书 创建CA openssl genrsa -out private/cakey.pem 2048 chmod 600 private/cakey.pem openssl req -new -x509 -days 36500 -key private/cakey.pem -out cacert.pem cp /etc/pki/tls/openssl.cnf ./ touch index.txt echo "01" > serial 生成服务器私钥 openssl genrsa -out ldapserverkey.pem 2048 生成请求文件 openssl req -new -key ldapserverkey.pem -out ldapserver.csr vim openssl.cnf 修改第42行, 目录修改为当前目录 签署证书 openssl ca -days 36500 -cert cacert.pem -keyfile cakey.pem -in ldapserver.csr -out ldapserver.crt -config openssl.cnf mkdir /etc/openldap/certs cp ldapserver.crt ldapserverkey.pem /etc/openldap/certs/ #OpenLdap配置证书 vim ~/certs.ldif dn: cn=config changetype: modify add: olcTLSCertificateFile olcTLSCertificateKeyFile: /etc/openldap/certs/ldapserver.crt dn: cn=config changetype: modify add: olcTLSCACertificateFile olcTLSCACertificateFile: /etc/openldap/cacerts/cacert.pem dn: cn=config changetype: modify add: olcTLSCertificateKeyFile olcTLSCertificateKeyFile: /etc/openldap/certs/ldapserverkey.pem ldapmodify -Y EXTERNAL -H ldapi:/// -f certs.ldif vim /etc/sysconfig/slapd SLAPD_URLS="ldapi:/// ldap:/// ldaps:///" 重启slapd 服务 systemctl restart slapd -
添加密码策略
vim ppolicyadd.ldif dn: cn=default,ou=ppolicy,dc=example,dc=edu cn: default objectClass: pwdPolicy objectClass: person pwdAllowUserChange: TRUE pwdAttribute: userPassword pwdExpireWarning: 259200 pwdFailureCountInterval: 0 pwdGraceAuthNLimit: 5 pwdInHistory: 5 pwdLockout: TRUE pwdLockoutDuration: 300 pwdMaxAge: 2592000 pwdMaxFailure: 5 pwdMinAge: 0 pwdMinLength: 8 pwdMustChange: TRUE sn: summy value ldapadd -x -D "cn=admin,dc=example,dc=edu" -w PASSWD@EDU -f ppolicyadd.ldif
（二）OpenLdap 客户端部分配置
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安装相关组件
yum install sssd -
配置名称服务交换机
vim /etc/nsswitch.conf # looked up first in the databases # # Example: #passwd: db files nisplus nis #shadow: db files nisplus nis #group: db files nisplus nis passwd: files sss # 修改这 shadow: files sss # 修改这 group: files sss # 修改这 #initgroups: files sss #hosts: db files nisplus nis dns hosts: files dns myhostname # Example - obey only what nisplus tells us... #services: nisplus [NOTFOUND=return] files #networks: nisplus [NOTFOUND=return] files #protocols: nisplus [NOTFOUND=return] files #rpc: nisplus [NOTFOUND=return] files #ethers: nisplus [NOTFOUND=return] files #netmasks: nisplus [NOTFOUND=return] files bootparams: nisplus [NOTFOUND=return] files ethers: files netmasks: files networks: files protocols: files rpc: files services: files sss netgroup: files sss # 修改这 publickey: nisplus automount: files sss # 修改这 aliases: files nisplus -
配置PAM
authconfig --enablesssdauth --update -
配置SSSD服务
配置参考：
vim /etc/sssd/sssd.conf（如果没有就新建） [domain/default] autofs_provider = ldap cache_credentials = True ldap_search_base = dc=example,dc=edu id_provider = ldap auth_provider = ldap chpass_provider = ldap ldap_uri = ldaps://192.168.101.1:636 ldap_chpass_uri= ldaps://192.168.101.1:636 ldap_id_use_start_tls = True ldap_tls_cacertdir = /etc/openldap/cacerts ldap_schema = rfc2307bis ldap_default_bind_dn= cn=admin,dc=example,dc=edu ldap_default_authtok= PASSWD@EDU ldap_tls_reqcert= allow access_provider = ldap ldap_pwd_policy = shadow ldap_access_order = pwd_expire_policy_renew ldap_account_expire_policy= shadow ldap_chpass_update_last_change = True [sssd] services = nss, pam, autofs config_file_version = 2 domains = default [nss] homedir_substring = /rhome/ [pam] reconnection_retries = 3 offline_credentials_expiration = 2 offline_failed_login_attempts = 3 offline_failed_login_delay = 5 -
启动SSSD 服务并测试
systemctl start sssd systemctl enable sssd 使用LDAP Admin 连接Ldap，在LDAP中新建用户，新建完毕后，若在终端中执行如下命令： id [用户名] 可以获得UID以及用户组，则表示成功。 注意： 当在LDAP中设置用户 shadowLastChange 为0时，则强制用户登录时修改密码。
（三） 限制用户访问无计算任务的节点
- 确认相关so文件存在
find / -name pam_slurm_adopt.so 若存在文件，且位置在/usr/lib64/security/,则继续
- 编辑/etc/pam.d/sshd
在如下位置，添加内容。
auth include password-auth
#newadd-start
account sufficient pam_listfile.so item=user sense=allow file=/etc/ssh/allowed_users onerr=fail
account required pam_slurm_adopt.so
#newadd-end
account required pam_nologin.so
- 新建 /etc/ssh/allowed_users 白名单
编辑sshd用户白名单文件。在步骤3完成后，所有用户（root除外）在没有作业运行的情况下是不能ssh登陆计算节点的。如果想对某些用户进行进行排除（即不受pam配置限制），可以在/etc/ssh/allowed_users中添加。
vim /etc/ssh/allowed_users
root
youruser
chmod 600 /etc/ssh/allowed_users
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修改其他Pam配置
在 system-auth、passowrd-auth 中注释掉以下内容 account sufficient pam_localuser.so -session optional pam_systemd.so -
确保SSH 使用了PAM
cat /etc/ssh/sshd_config | grep UsePAM结果应为 UsePAM yes
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