基于sasl认证配置libvirt

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战狐 2017-12-15 14:26:56 博主文章分类：虚拟化 ©著作权

文章标签 sasl2 kvm 文章分类 运维

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Username and Password Authentication with SASL

SASL provides username and password authentication as well as data encryption (digest-md5, by default).

Since SASL maintains its own user database, the users do not need to exist on the VM Host Server.

SASL is required by TCP connections and on top of TLS/SSL connections.

To configure SASL authentication, proceed as follows:

一、修改libvirtd配置 1.1修改 /etc/libvirt/libvirtd.conf :

listen_tls = 0
listen_tcp = 1
tcp_port = "16509"
auth_tcp = "sasl"

#如果启用tls，配置如下
auth_tls = "sasl"

1.2 修改/etc/sysconfig/libvirtd

#开启tcp端口
LIBVIRTD_ARGS="--listen"

二、添加sasl2配置 2.1 设置加密方式 /etc/sasl2/libvirt.conf

mech_list:digest-md5
sasldb_path: /etc/libvirt/passwd.db

2.2 安装所需依赖包：

#一般我会把所有包装上 yum install cyrus-sasl*
yum install cyrus-sasl-md5-2.1.26-21.el7.x86_64 cyrus-sasl-devel-2.1.26-21.el7.x86_64

三、重启libvirtd

#如果调试或者没生效使用：libvirtd --daemon --listen --config /etc/libvirt/libvirtd.conf
systemctl restart libvirtd

四、添加用户

注意这里必须是libvirt，这是application的名字，只有输入libvirt，才会使用配置/etc/sasl2/libvirt.conf，结果才会写到/etc/libvirt/passwd.db

mercury:~ # saslpasswd2 -a libvirt foxchan # add user foxchan Password: Again (for verification):

mercury:~ # sasldblistusers2 -f /etc/libvirt/passwd.db # list users foxchan@mercury.example.com: userPassword mercury:~ # saslpasswd2 -a libvirt -d foxchan # delete user foxchan


如果使用qemu+tcp://连接，则应该enable digest-md5，这样交互会被加密。
如果使用qemu+tls://连接，则应该disable digest-md5，这样交互就不会被md5加密一次，然后再被TLS加密一次

# virsh -c qemu+tcp://localhost/system nodeinfo
Please enter your authentication name: 
Please enter your password: 
CPU model:           x86_64
CPU(s):              24
CPU frequency:       1999 MHz
CPU socket(s):       1
Core(s) per socket:  6
Thread(s) per core:  2
NUMA cell(s):        2
Memory size:         134171180 KiB

如果是加密连接，配置如下 #对于tcp或者tls则auth

auth_tcp = "sasl"

#对于tls需要configure下面的

auth_tls = "sasl"

key_file = "/etc/pki/libvirt/private/serverkey.pem"

cert_file = "/etc/pki/libvirt/servercert.pem"

ca_file = "/etc/pki/CA/cacert.pem"


创建key和certificate

/////////////////////////////Create the Certificate Authority Certificate

cat certificate_authority_template.info

cn = libvirt.org ca cert_signing_key

apt-get install gnutls-bin

(umask 277 && certtool --generate-privkey > certificate_authority_key.pem)

cat certificate_authority_key.pem

root@popsuper1982:/home/cliu8/keys/certtool# ls -la certificate_authority_key.pem -r-------- 1 root root 1972 Jul 15 22:28 certificate_authority_key.pem

certtool --generate-self-signed --template certificate_authority_template.info --load-privkey certificate_authority_key.pem --outfile certificate_authority_certificate.pem

Generating a self signed certificate... X.509 Certificate Information: Version: 3 Serial Number (hex): 53c53b4d Validity: Not Before: Tue Jul 15 14:31:41 UTC 2014 Not After: Wed Jul 15 14:31:41 UTC 2015 Subject: CN=libvirt.org Subject Public Key Algorithm: RSA Certificate Security Level: Normal Modulus (bits 2432): 00:e9:59:61:58:f3:f4:a0:db:7a:c1:57:48:5c:c4:19 5a:2c:b3:51:cf:2c:37:31:64:3f:52:bc:ea:f8:1b:db 3f:ed:95:7d:c1:0f:56:cd:4c:21:d5:a3:fd:93:78:29 87:ca:fe:1a:7b:79:01:c6:69:c1:d1:84:93:f7:6f:18 87:f9:5b:9f:7a:b8:c1:ac:ab:a8:8c:1f:fc:c9:d8:f5 29:b5:ea:1e:e3:3f:9d:f1:ff:56:83:ea:ed:48:30:ac 61:e5:39:46:22:53:97:57:09:6c:6c:58:de:7f:f5:a5 d8:46:46:79:19:4d:be:6f:1c:d0:2c:1c:8b:ef:1c:be ca:96:5e:87:ef:36:83:7a:9b:1b:1e:03:18:71:60:70 f5:73:1b:11:e6:01:3e:87:43:b9:7a:aa:4b:01:99:21 69:76:4e:22:0e:e6:a5:bc:23:48:d9:04:ad:1e:56:b7 90:8b:01:bb:bb:72:aa:f9:3c:ba:b1:9a:2a:d3:45:de d3:84:82:4e:40:07:da:1f:e9:b7:47:3b:96:6d:e0:f8 1b:b0:c1:98:d0:df:9b:c9:f9:c6:d9:32:58:43:8e:9a e6:6a:a7:6f:a9:c2:df:c8:60:7b:87:f5:d1:f4:25:1a c4:3c:bb:17:fe:83:a1:06:48:8b:a5:1a:b3:00:91:d9 26:2a:8d:73:dc:e5:a1:85:a4:1a:29:1f:1d:c1:fb:14 4f:51:8f:4b:9c:19:15:49:7c:de:3d:0e:cb:47:84:b6 ff:d2:dd:1e:2a:d6:77:59:18:df:c1:82:39:a4:0f:47 51 Exponent (bits 24): 01:00:01 Extensions: Basic Constraints (critical): Certificate Authority (CA): TRUE Key Usage (critical): Certificate signing. Subject Key Identifier (not critical): f113e5356c2b30271aa1f1bb6183676edee28ed7 Other Information: Public Key Id: f113e5356c2b30271aa1f1bb6183676edee28ed7

Signing certificate...

cat certificate_authority_certificate.pem

查看证书

ls -la certificate_authority_certificate.pem -r-------- 1 root root 1204 Jul 15 22:31 certificate_authority_certificate.pem

cp certificate_authority_certificate.pem /etc/pki/CA/cacert.pem

chmod 444 /etc/pki/CA/cacert.pem

scp -r certificate_authority_certificate.pem cliu8@16.158.166.197:/home/cliu8/

on 16.158.166.197 cp certificate_authority_certificate.pem /etc/pki/CA/cacert.pem


/////////////////////////Creating Transport Layer Security Server Certificates for libvirt
# cat popsuper1982_server_template.info 
organization = libvirt.org
cn = popsuper1982
tls_www_server
encryption_key
signing_key

(umask 277 && certtool --generate-privkey > popsuper1982_server_key.pem)

# (umask 277 && certtool --generate-privkey > popsuper1982_server_key.pem)
Generating a 2432 bit RSA private key...

# certtool --generate-certificate --template popsuper1982_server_template.info --load-privkey popsuper1982_server_key.pem --load-ca-certificate certificate_authority_certificate.pem --load-ca-privkey certificate_authority_key.pem --outfile popsuper1982_server_certificate.pem

# certtool --generate-certificate --template popsuper1982_server_template.info --load-privkey popsuper1982_server_key.pem --load-ca-certificate certificate_authority_certificate.pem --load-ca-privkey certificate_authority_key.pem --outfile popsuper1982_server_certificate.pem
Generating a signed certificate...
X.509 Certificate Information:
        Version: 3
        Serial Number (hex): 53c55255
        Validity:
                Not Before: Tue Jul 15 16:09:57 UTC 2014
                Not After: Wed Jul 15 16:09:57 UTC 2015
        Subject: O=libvirt.org,CN=popsuper1982
        Subject Public Key Algorithm: RSA
        Certificate Security Level: Normal
                Modulus (bits 2432):
                        00:ca:e5:92:4f:d8:14:f4:e2:26:26:88:5a:b4:fd:0e
                        ee:86:c6:e8:15:b2:4f:36:6d:8a:b1:23:75:80:b1:0a
                        72:e0:6c:a0:06:ce:03:43:12:2c:6f:e9:ee:bf:21:d2
                        93:82:02:74:14:50:17:fc:f8:21:ec:a6:66:29:9f:d7
                        c3:63:35:50:82:f2:30:9a:12:3b:3e:5a:d1:68:29:7a
                        eb:18:10:7a:69:f8:0b:aa:1a:d9:2d:8b:e4:b3:1b:81
                        c7:de:a8:9f:08:1d:d0:85:db:af:cc:08:00:9b:c1:5a
                        31:f8:9a:43:01:42:88:11:91:35:73:df:57:b9:ce:83
                        34:91:70:ee:29:4b:88:dd:f2:7a:16:1d:c1:36:4d:8b
                        28:7b:05:ba:42:b1:63:8a:92:f8:3d:0c:d1:a2:d8:24
                        92:29:de:c7:8a:73:1d:1e:ec:d3:72:4a:7e:7a:a1:43
                        85:fa:85:ab:58:a3:67:03:4a:48:62:04:b3:f4:8e:f5
                        f0:16:fb:24:28:75:d7:1d:43:52:bc:08:9d:3e:d0:38
                        7d:36:9b:1b:f5:81:0c:17:fd:ba:1b:10:bb:1b:69:cf
                        eb:c1:54:4e:99:ed:ff:15:71:11:9a:63:31:9d:0f:7b
                        b2:31:a2:4c:49:2a:ee:d1:3c:80:c0:98:e0:6c:63:6b
                        52:9a:b5:d6:0b:6c:34:13:86:d6:ab:c4:4d:9a:ff:ae
                        be:60:b2:a7:e3:3d:b4:63:05:d3:f0:f9:69:01:35:97
                        1c:52:48:24:75:b5:73:96:b5:fb:bc:8e:2e:62:7c:5c
                        17
                Exponent (bits 24):
                        01:00:01
        Extensions:
                Basic Constraints (critical):
                        Certificate Authority (CA): FALSE
                Key Purpose (not critical):
                        TLS WWW Server.
                Key Usage (critical):
                        Digital signature.
                        Key encipherment.
                Subject Key Identifier (not critical):
                        0570b6cf340118f7d44dd67c0ca6ffbbb7a4871c
                Authority Key Identifier (not critical):
                        f113e5356c2b30271aa1f1bb6183676edee28ed7
Other Information:
        Public Key Id:
                0570b6cf340118f7d44dd67c0ca6ffbbb7a4871c

Signing certificate...

cp popsuper1982_server_certificate.pem /etc/pki/libvirt/servercert.pem

cp popsuper1982_server_key.pem /etc/pki/libvirt/private/serverkey.pem

///////////////////////Creating Transport Layer Security Client Certificates for libvirt

# cat escto-bj-hp-z620_client_template.info 
country = CN
state = Beijing
locality = Beijing
organization = libvirt.org
cn = escto-bj-hp-z620
tls_www_client
encryption_key
signing_key

(umask 277 && certtool --generate-privkey > escto-bj-hp-z620_client_key.pem)

(umask 277 && certtool --generate-privkey > escto-bj-hp-z620_client_key.pem) Generating a 2432 bit RSA private key...

certtool --generate-certificate --template escto-bj-hp-z620_client_template.info --load-privkey escto-bj-hp-z620_client_key.pem --load-ca-certificate certificate_authority_certificate.pem --load-ca-privkey certificate_authority_key.pem --outfile escto-bj-hp-z620_client_certificate.pem Generating a signed certificate... X.509 Certificate Information: Version: 3 Serial Number (hex): 53c55678 Validity: Not Before: Tue Jul 15 16:27:36 UTC 2014 Not After: Wed Jul 15 16:27:36 UTC 2015 Subject: C=CN,O=libvirt.org,L=Beijing,ST=Beijing,CN=escto-bj-hp-z620 Subject Public Key Algorithm: RSA Certificate Security Level: Normal Modulus (bits 2432): 00:9f:5c:d7:89:2c:0b:fe:e7:38:21:1d:2a:da:92:eb 82:91:96:3c:f3:22:28:a3:d6:3d:70:68:27:a1:2b:3a 3e:79:03:55:ea:1b:eb:1f:81:90:71:3d:41:4c:99:f2 96:46:22:e0:33:91:bb:5b:38:83:a5:3f:d7:0a:25:dd f0:90:cf:0d:4a:18:b3:0d:db:01:5f:70:78:1b:63:01 ac:6f:32:8b:79:cc:51:0f:d4:45:1e:6f:b8:d8:84:57 af:ca:e8:3e:58:0a:79:89:0d:99:e2:8a:b2:2c:85:dc 40:15:7c:52:9b:46:66:a0:0f:6c:52:7d:e8:1b:b4:06 5a:d9:7f:30:84:d0:37:66:2a:3f:53:50:33:99:93:b7 8d:a2:74:cd:4d:ca:76:b5:df:2f:47:f9:e2:1a:7b:91 49:20:be:c9:ca:9b:f1:2c:f1:40:1a:66:37:2e:ac:23 3f:3d:44:de:0f:2d:d2:60:63:22:2d:49:28:98:c0:b7 9f:70:be:51:b8:d3:10:1d:40:3d:3e:6f:1a:f1:a2:1b 5c:2e:68:8b:05:99:7b:0b:5c:9c:78:54:8f:de:ae:7e 75:6d:fb:af:cc:ea:3c:be:9d:25:57:d1:3d:ef:27:66 c3:93:2f:62:f0:43:31:64:df:df:20:b6:b8:df:8a:85 77:38:9b:3d:85:e1:67:1b:e6:b4:9b:e0:30:4e:6c:62 c1:07:72:57:ad:bc:fc:f0:0c:d8:d4:12:ac:eb:80:ee 04:b2:b0:10:e4:d6:71:68:2b:ee:e6:98:23:9a:df:c7 95 Exponent (bits 24): 01:00:01 Extensions: Basic Constraints (critical): Certificate Authority (CA): FALSE Key Purpose (not critical): TLS WWW Client. Key Usage (critical): Digital signature. Key encipherment. Subject Key Identifier (not critical): f4385711f8089b39ba2c13869aa816114d378190 Authority Key Identifier (not critical): f113e5356c2b30271aa1f1bb6183676edee28ed7 Other Information: Public Key Id: f4385711f8089b39ba2c13869aa816114d378190

Signing certificate...

root@popsuper1982:/home/cliu8/keys/certtool# scp escto-bj-hp-z620_client_certificate.pem cliu8@16.158.166.197:/home/cliu8/ cliu8@16.158.166.197's password: escto-bj-hp-z620_client_certificate.pem 100% 1379 1.4KB/s 00:00
root@popsuper1982:/home/cliu8/keys/certtool# scp escto-bj-hp-z620_client_key.pem cliu8@16.158.166.197:/home/cliu8/
cliu8@16.158.166.197's password: escto-bj-hp-z620_client_key.pem 100% 1968 1.9KB/s 00:00

修改/etc/hosts文件

16.158.166.150 popsuper1982 16.158.166.197 escto-bj-hp-z620

修改/etc/default/libvirt-bin

#cat /etc/default/libvirt-bin

Defaults for libvirt-bin initscript (/etc/init.d/libvirt-bin)

This is a POSIX shell fragment

Start libvirtd to handle qemu/kvm:

start_libvirtd="yes"

options passed to libvirtd, add "-l" to listen on tcp

libvirtd_opts="-d -l"

pass in location of kerberos keytab

#export KRB5_KTNAME=/etc/libvirt/libvirt.keytab

重启libvirt-bin

root@popsuper1982:/home/cliu8# netstat -na | grep 16509 tcp 0 0 0.0.0.0:16509 0.0.0.0:* LISTEN
tcp6 0 0 :::16509 :::* LISTEN
root@popsuper1982:/home/cliu8# netstat -na | grep 16514 tcp 0 0 0.0.0.0:16514 0.0.0.0:* LISTEN
tcp6 0 0 :::16514 :::* LISTEN




如果远程连接tls，则需要配置/etc/pki/CA/cacert.pem

在client机器上escto-bj-hp-z620

在server机器上popsuper1982

tree --charset ASCII /etc/pki/

virsh -c qemu+tls://popsuper1982/system list --all

Please enter your authentication name: test1@popsuper1982 Please enter your password: Id Name State

ubuntu-14.04                   shut off

需要用hostname才能通过认证

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