ovirt配置为cas登录

准备工作

Ovirt测试机、CAS服务器、AD服务器

cas.crt —— CAS服务器的CA证书

allwinner.cer —— CAS服务器的证书颁发机构根证书

Ovirt测试机要求：apache 2.2、mod_auth_cas、ovirt 3.6、openssl

CAS服务器地址：https://sso.allwinnertech.com:3443/

Ovirt测试机地址：https://kvmtest.allwinnertech.com/

安装ovirt的authenticate extension，并配置properties文件

yum install -y ovirt-engine-extension-aaa-misc ovirt-engine-extension-aaa-ldap ovirt-engine-extension-aaa-ldap-setup

# 将配置模板拷贝到 ovirt-engine 的安装目录（/etc/ovirt-engine）

cp -rf /usr/share/ovirt-engine-extension-aaa-ldap/examples/ad-sso/* /etc/ovirt-engine

# 修改配置文件的权限和所有者

chown ovirt:ovirt /etc/ovirt-engine/extensions.d/*
chown ovirt:ovirt /etc/ovirt-engine/aaa/*
chmod 600 /etc/ovirt-engine/extensions.d/*
chmod 600 /etc/ovirt-engine/aaa/*

# 修改配置文件的名字（自定义）以及内容

mv /etc/ovirt-engine/extensions.d/profile1-http-mapping.properties /etc/ovirt-engine/extensions.d/apachesso-http-mapping.properties
mv /etc/ovirt-engine/extensions.d/profile1-http-authn.properties /etc/ovirt-engine/extensions.d/apachesso-http-authn.properties
mv /etc/ovirt-engine/extensions.d/profile1-authz.properties /etc/ovirt-engine/extensions.d/allwinnertech-authz.properties
mv /etc/ovirt-engine/aaa/profile1.properties /etc/ovirt-engine/aaa/allwinnertech.properties

注意：这里的授权文件的名字最好定义为域名，比如：allwinnertech。

# 新增一个认证文件，用于账号、密码登录

touch /etc/ovirt-engine/extensions.d/login-authn.properties
# /etc/ovirt-engine/extensions.d/login-authn.properties
ovirt.engine.extension.name = login-authn
ovirt.engine.extension.bindings.method = jbossmodule
ovirt.engine.extension.binding.jbossmodule.module = org.ovirt.engine-extensions.aaa.ldap
ovirt.engine.extension.binding.jbossmodule.class = org.ovirt.engineextensions.aaa.ldap.AuthnExtension
ovirt.engine.extension.provides = org.ovirt.engine.api.extensions.aaa.Authn
ovirt.engine.aaa.authn.profile.name = login
ovirt.engine.aaa.authn.authz.plugin = allwinnertech-authz
config.profile.file.1 = ../aaa/allwinnertech.properties

# 上面配置内容如下：

# /etc/ovirt-engine/extensions.d/apachesso-http-mapping.properties
ovirt.engine.extension.name = apachesso-http-mapping
ovirt.engine.extension.bindings.method = jbossmodule
ovirt.engine.extension.binding.jbossmodule.module = org.ovirt.engine-extensions.aaa.misc
ovirt.engine.extension.binding.jbossmodule.class = org.ovirt.engineextensions.aaa.misc.mapping.MappingExtension
ovirt.engine.extension.provides = org.ovirt.engine.api.extensions.aaa.Mapping
config.mapAuthRecord.type = regex
config.mapAuthRecord.regex.mustMatch = false
config.mapAuthRecord.regex.pattern = ^(?<user>.*?)((\\(?<at>@)(?<suffix>.*?)@.*)|(?<realm>@.*))$
config.mapAuthRecord.regex.replacement = ${user}${at}${suffix}${realm}

# /etc/ovirt-engine/extensions.d/apachesso-http-authn.properties
ovirt.engine.extension.name = apachesso-http-authn
ovirt.engine.extension.bindings.method = jbossmodule
ovirt.engine.extension.binding.jbossmodule.module = org.ovirt.engine-extensions.aaa.misc
ovirt.engine.extension.binding.jbossmodule.class = org.ovirt.engineextensions.aaa.misc.http.AuthnExtension
ovirt.engine.extension.provides = org.ovirt.engine.api.extensions.aaa.Authn
ovirt.engine.aaa.authn.profile.name = apachesso-http
ovirt.engine.aaa.authn.authz.plugin = allwinnertech-authz
ovirt.engine.aaa.authn.mapping.plugin = apachesso-http-mapping
config.artifact.name = HEADER
config.artifact.arg = X-Remote-User

# /etc/ovirt-engine/extensions.d/allwinnertech-authz.properties
ovirt.engine.extension.name = allwinnertech-authz
ovirt.engine.extension.bindings.method = jbossmodule
ovirt.engine.extension.binding.jbossmodule.module = org.ovirt.engine-extensions.aaa.ldap
ovirt.engine.extension.binding.jbossmodule.class = org.ovirt.engineextensions.aaa.ldap.AuthzExtension
ovirt.engine.extension.provides = org.ovirt.engine.api.extensions.aaa.Authz
config.profile.file.1 = ../aaa/allwinnertech.properties

# /etc/ovirt-engine/aaa/allwinnertech.properties
include = <ad.properties>
vars.forest = allwinnertech.com
vars.user = cas@${global:vars.forest}
vars.password = ****
pool.default.serverset.type = srvrecord
pool.default.serverset.srvrecord.domain = ${global:vars.forest}
pool.default.auth.simple.bindDN = ${global:vars.user}
pool.default.auth.simple.password = ${global:vars.password}

Apache配置

配置Ovirt单点登录端口（443）

# 在ssl.conf中增加如下内容

LoadModule auth_cas_module modules/mod_auth_cas.so
CASLoginURL https://sso.allwinnertech.com:3443/login
CASValidateURL https://sso.allwinnertech.com:3443/serviceValidate
CASCookiePath /tmp/cas-cookies/
CASTimeout 50400
CASDebug On
......
<VirtualHost *:443>
......
Servername kvmtest.allwinnertech.com
<LocationMatch ^(/ovirt-engine/(webadmin|userportal|api))>
AuthType CAS
AuthName "CAS Login"
Require valid-user
CASAuthNHeader Remote-User

RewriteEngine on
RewriteCond %{LA-U:REMOTE_USER} ^(.*)$
RewriteRule ^(.*)$ - [L,NS,P,E=REMOTE_USER:%1]
RequestHeader set X-Remote-User %{REMOTE_USER}s
</LocationMatch>
</VirtualHost>

注意：这里需指定一个有效的CAS服务器，同时需要处理以下两件事：

# 创建cas存放cookie的目录（/tmp/cas-cookies）

mkdir /tmp/cas-cookies
chmod 700 /tmp/cas-cookies
chown apache:apache /tmp/cas-cookies
# 创建目录策略，避免写入操作被Selinux阻止
chcon -R -h -t httpd_sys_content_t /tmp/cas-cookies

# 因为CAS使用的是SSL传输，而CAS证书颁发机构不被信任，所以需要配置为可信（如果不配置，mod_auth_cas里面执行curl命令会失败）

yum install -y ca-certificates
update-ca-trust force-enable
cp allwinner.cer /etc/pki/ca-trust/source/anchors/
update-ca-trust extract

将准备好的allwinner.cer放入上面的目录中，然后将cas.crt放入 /etc/ssl/certs 目录中。

Ovirt账号、密码登录端口（3443）

# 在/etc/httpd/conf.d/下面增加文件 ovirt-sso.conf

LoadModule ssl_module modules/mod_ssl.so

Listen 3443

<VirtualHost *:3443>
ErrorLog logs/ovirt_error_log
TransferLog logs/ovirt_access_log
LogLevel debug

SSLEngine on
SSLCertificateFile /etc/httpd/ssl/kvm.crt
SSLCertificateKeyFile /etc/httpd/ssl/kvm.key

SetEnvIf User-Agent ".*MSIE.*" 
nokeepalive ssl-unclean-shutdown 
downgrade-1.0 force-response-1.0

CustomLog logs/ssl1_request_log 
"%t %h %{SSL_PROTOCOL}x %{SSL_CIPHER}x "%r" %b"

Servername kvmtest.allwinnertech.com
</VirtualHost>

注意：这个配置主要是用于不适合通过单点登录进入的设备，需要准备 kvm.crt 和 kvm.key 两个文件。这里没有配置Location的原因是因为在ovirt在/etc/httpd/conf.d下有一个被强制执行的配置文件（z-ovirt-engine-proxy.conf），因为Ovirt不支持http登录（https://bugzilla.redhat.com/show_bug.cgi?id=1077447），所以才选择配置为SSL的方式。

重启ovirt和apache服务

service ovirt-engine restart
service httpd restart

测试配置

访问测试

https://kvmtest.allwinnertech.com/ovirt-engine/userportal # 跳转到CAS的登录页面

https://kvmtest.allwinnertech.com:3443/ovirt-engine/userportal # 返回的是ovirt的登录页面

访问上面两个链接，看是否按照后面注释执行。

登录测试

当提示没有授权时，这时应该以管理员账号进入，为该用户授权登录权限。

ldap调试日志开启

如果要记录ldap的登录日志，可以编辑 /usr/share/ovirt-engine/services/ovirt-engine/ovirt-engine.xml.in 文件，然后在root-logger上面增加

<logger category="org.ovirt.engineextensions.aaa.ldap">

　　<level name="DEBUG"/>

</logger>
然后保存，重启ovirt-engine。

日志访问位置为：/var/log/ovirt-engine/engine.log

参考：https://bugzilla.redhat.com/show_bug.cgi?id=1019243