Introduction
This guide contains advanced configuration information for system administrators working with MyProxy. It provides references to information on procedures typically performed by system administrators, including installation, configuring, deploying, and testing the installation.
![[Important]](/docbook-images/important.gif) | Important |
|---|---|
This information is in addition to the basic Globus Toolkit prerequisite, overview, installation, security configuration instructions in the Installing GT 4.2.0. Read through this guide before continuing! |
A typical MyProxy configuration has one dedicated myproxy-server for the site, with MyProxy clients installed on all systems where other Globus Toolkit client software is installed.
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MyProxy is built and installed as part of a default GT 4.2.0 installation. For basic installation instructions, see the Installing GT 4.2.0. No extra installation steps are required for this component.
If you wish to install MyProxy without installing the rest of the Globus Toolkit, follow the instructions in the Installing GT 4.2.0 with the following changes. First, you do not need Ant, a JDK, or a JDBC database to build only MyProxy. Second, instead of running "make", run:
globus$ make gsi-myproxy
This will install the MyProxy client and server programs. For client-only installations, simply do not configure or use the installed server.
No additional configuration is required to use MyProxy clients after they are installed, although you may want to set the MYPROXY_SERVER environment variable to the hostname of your myproxy-server in the default user environment on your systems.
To configure the myproxy-server you must
modify $GLOBUS_LOCATION/etc/myproxy-server.config.
If you skip this step, your myproxy-server will not accept
any requests.
The default configuration does not enable any
myproxy-server features to provide the greatest security until you
have configured your server.
To enable all myproxy-server features uncomment the provided sample
policy at the top of the myproxy-server.config config file, as
follows:
# # Complete Sample Policy # # The following lines define a sample policy that enables all # myproxy-server features. See below for more examples. accepted_credentials "*" authorized_retrievers "*" default_retrievers "*" authorized_renewers "*" default_renewers "none"
Please see below for additional documentation on the myproxy-server.config options.
If you have root access, you can copy your
myproxy-server.config file to
/etc/myproxy-server.config
so it is not overwritten by later installations.
The myproxy-server.config file sets the policy for
the myproxy-server(8), specifying what credentials may be
stored in the server's repository and who is authorized to retrieve credentials.
By default, the myproxy-server(8) looks for this file in /etc/myproxy-server.config
and if it is not found there, it looks in $GLOBUS_LOCATION/etc/myproxy-server.config.
The myproxy-server -c option can
be used to specify an alternative location. The file installed by default
does not allow any requests.
The file also supports a passphrase_policy_program command for specifying an external program for evaluating the quality of users' passphrases. A sample program is installed in $GLOBUS_LOCATION/share/myproxy/myproxy-passphrase-policy but is not enabled by default.
Lines in the configuration file use limited regular expressions for matching the distinguished names (DNs) of classes of users. The limited regular expressions support the shell-style characters '*' and '?', where '*' matches any number of characters and '?' matches any single character.
The DN limited regexes should be delimited with double quotes ("DN regex").
The configuration file has the following types of lines:
Table 1. myproxy-server.config lines
| accepted_credentials "DNregex" | Each of these lines allows any clients whose DNs match the given
limited regex to connect to the myproxy-server and store
credentials with it for future retrieval. Any number of these
lines may appear. For backwards compatibility, these lines can
also start with allowed_clients instead of
accepted_credentials. |
| authorized_retrievers "DN regex" | Each of these lines allows the server administrator to set
server-wide policies for authorized retrievers. If the client DN
does not match the given limited regex, the client is not allowed
to retrieve the credentials previously stored by a client. In
addition to the server-wide policy, MyProxy also provides support
for per-credential policy. The user can specify the regex DN of the allowed
retrievers of the credential when uploading the credential (using myproxy-init(1)).
The retrieval client DN must also match the user specified regex. In order
to retrieve credentials the client also needs to know the name and pass
phrase provided by the client when the credentials were stored.
Any number of these lines may appear. For backwards compatibility,
these lines can also start with allowed_services instead
of
authorized_retrievers. |
| default_retrievers "DN regex" | Each of these lines allows the server administrator to set
server-wide default policies. The regex specifies the clients
who can access the credentials. The default retriever policy is
enforced if a per-credential policy is not specified on upload
(using myproxy-init(1)). In other words, the client
can override this policy for a credential on upload. The per-credential
policy is enforced in addition to the server-wide policy specified
by the authorized_retrievers line (which clients can
not override). Any number of these lines may be present. For backwards
compatibility, if no default_retrievers line is specified,
the default policy is "*", which allows any client to pass the
per-credential policy check. (The client must still pass the
authorized_retrievers check). |
| authorized_renewers "DN regex" | Each of these lines allows the server administrator to set
server-wide policies for authorized renewers. If the client DN
does not match the given limited regex the client is not allowed
to renew the credentials previously stored by a client. In
addition to the server-wide policy, MyProxy also provides support
for per-credential policy. The user can specify the regex DN of the allowed
renewers of the credential on upload (using
myproxy-init(1)). The renewal client DN must match both
this regex and the user specified regex. In this case, the client
must also already have a credential with a DN matching the DN of
the credentials to be retrieved, to be used in a second authorization step (see the -a option for myproxy-logon(1)). |
| default_renewers "DN regex" | Each of these lines allows the server administrator to set
server-wide default renewer policies. The regex specifies the
clients who can renew the credentials. The default renewer policy
is enforced if a per-credential policy is not specified on upload (using myproxy-init(1)).
This is enforced in addition to the server-wide policy specified by the authorized_renewers
line. Any number of these lines may appear. For backwards compatibility,
if no default_renewers line is specified, the default
policy is "*",
which allows any client to pass the per-credential policy check.
(The client must still pass the authorized_renewers check). |
| passphrase_policy_program full-path-to-script | This line specifies a program to run whenever a passphrase is
set or changed for implementing a local password policy. The
program is passed the new passphrase via stdin and is passed the
following arguments: username, distinguished name, credential
name (if any), per-credential retriever policy (if any), and
per-credential renewal policy (if any). If the passphrase is
acceptable, the program should exit with status 0. Otherwise,
it should exit with non-zero status, causing the operation in
progress (credential load, passphrase change) to fail with the
error message provided by the program's stdout. Note: You must
specify the full path to the external program. $GLOBUS_LOCATION can't be used in the myproxy-server.config file. |
| max_proxy_lifetime hours | This line specifies a server-wide maximum lifetime for retrieved proxy credentials. By default, no server-wide maximum is enforced. However, if this option is specified, the server will limit the lifetime of any retrieved proxy credentials to the value given. |
A sample SysV-style
boot script for MyProxy is installed at
$GLOBUS_LOCATION/share/myproxy/etc.init.d.myproxy.
To install on Linux, copy the file to /etc/rc.d/init.d/myproxy and run:
chkconfig --add myproxy
You will need to edit the file to set the GLOBUS_LOCATION environment
variable correctly.
Alternatively, to run the myproxy server out of inetd or xinetd, you need to do the following as root:
- Add the entries in
$GLOBUS_LOCATION/share/myproxy/etc.services.modifications to the/etc/servicesor/etc/inet/servicesfile. - Add the entries in
$GLOBUS_LOCATION/share/myproxy/etc.inetd.conf.modificationsto/etc/inetd.confor/etc/inet/inetd.conf, or copy$GLOBUS_LOCATION/share/myproxy/etc.xinetd.myproxyto/etc/xinetd.d/myproxy. You'll need to modify the paths in the file according to your installation. - Reactivate the inetd (or xinetd). This is typically accomplished by sending the SIGHUP signal to the daemon. Refer to the inetd or xinetd man page for your system.
To verify your myproxy-server installation and configuration, you can
run the myproxy-server directly from your shell.
If using a host certificate, you will need to run the myproxy-server
as root.
First, make sure your Globus environment is setup in your shell.
Set the GLOBUS_LOCATION environment variable to the location of your
MyProxy installation.
Then, depending on your shell, run one of the following commands.
For csh shells:
source $GLOBUS_LOCATION/etc/globus-user-env.csh
For sh shells:
. $GLOBUS_LOCATION/etc/globus-user-env.sh
Then, run $GLOBUS_LOCATION/sbin/myproxy-server -d.
The -d argument runs the myproxy-server in debug mode.
It will write debugging messages to the terminal and
exit after servicing a single request.
You will need to start it once for each test request.
In another shell, you can run the MyProxy client programs to test the
server.
If run without the -d argument,
the myproxy-server program will start up and background itself.
It accepts connections on TCP port 7512, forking off a separate child
to handle each incoming connection.
It logs information via the syslog service under the daemon facility.
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You should choose a well-protected host to run the myproxy-server on. Consult with security-aware personnel at your site. You want a host that is secured to the level of a Kerberos KDC, that has limited user access, runs limited services, and is well monitored and maintained in terms of security patches.
For a typical myproxy-server installation, the host on which the myproxy-server is running must have /etc/grid-security created and a host certificate installed. In this case, the myproxy-server will run as root so it can access the host certificate and key.
When troubleshooting a MyProxy problem, it is important to consult the myproxy-server logs. If you don't have access to the myproxy-server logs, please contact your myproxy-server administrator for help. The myproxy-server logs to the system logger (syslog) LOG_DAEMON facility. Alternatively, run
myproxy-server -d
from a terminal. In that mode, the myproxy-server will write debugging messages to the terminal and exit after servicing a single request.
As of 4.2.0, the Globus Toolkit provides system administration logs that are CEDPs best practices compliant.
Configuration for this logger can be changed by
editing $GLOBUS_LOCATION/FIXME/path/to/cedpslogfile.
For more details on the CEDPS Logging format, including descriptions of reserved name-value pairs, see http://cedps.net/index.php/LoggingBestPractices:
[FIXME the following is java core's info - tailor to this component] The specific logger to
edit will be log4j.logger.sysadmin in container-log4j.properties. There you can configure the following properties:
log4j.appender.infoCategory=org.apache.log4j.RollingFileAppender log4j.appender.infoCategory.Threshold=INFO log4j.appender.infoCategory.File=var/containerLog log4j.appender.infoCategory.MaxFileSize=10MB log4j.appender.infoCategory.MaxBackupIndex=2
Above implies the logging file is rolling with each file size limited to 10MB and the
logging information is stored in $GLOBUS_LOCATION/var/containerLog.
The sample log file contains many log entries for various scenarios in the Java WS container [FIXME does this apply for your component? if not, can you provide a sample log file?].
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For a list of common errors in GT, see Error Codes.
The most common cause of MyProxy authentication problems is incorrect system clocks. GSI authentication is very sensitive to clock skew. Make sure your system clock is accurate (for example, by running NTP) and your timezone is set correctly.
Table 1. MyProxy Errors
| Error Code | Definition | Possible Solutions |
|---|---|---|
MyProxy server name does not match expected name | This error appears as a mutual authentication failure or a server authentication failure, and the error message should list two names: the expected name of the MyProxy server and the actual authenticated name. By default, the MyProxy clients expect the MyProxy server to be running with a host certificate that matches the target hostname. This error can occur when running the MyProxy server under a non-host certificate or if the server is running on a machine with multiple hostnames. The MyProxy clients authenticate the identity of the MyProxy server to avoid sending passphrases and credentials to rogue servers.If the expected name contains an IP address, your system is unable to do a reverse lookup on that address to get the canonical hostname of the server, indicating either a problem with that machine's DNS record or a problem with the resolver on your system. |
If the server name shown in the error message is acceptable, set the MYPROXY_SERVER_DN environment variable to that name to resolve the problem.
|
Error in bind(): Address already in use | This error indicates that the myproxy-server port (default: 7512) is in use by another process, probably another myproxy-server instance. You cannot run multiple instances of the myproxy-server on the same network port. |
If you want to run multiple instances of the myproxy-server on a machine, you can specify different ports with the -p option,
and then give the same -p option to the MyProxy commands to tell them to use the myproxy-server on that port.
|
grid-proxy-init failed | This error indicates that the grid-proxy-init command failed when myproxy-init attempted to run it, which implies a problem with the underlying Globus installation. |
Run grid-proxy-init -debug -verifyfor more information. |
User not authorized | An error from the myproxy-server saying you are "not authorized" to complete an operation typically indicates that the
myproxy-server.config file settings are restricting your access to the myproxy-server. It is possible that the
myproxy-server is running with the default myproxy-server.config file, which does not authorize any operations. | See Configuring for more information. |
H
- host certificate
An EEC belonging to a host. When using GSI this certificate is typically stored in
/etc/grid-security/hostcert.pem. For more information on possible host certificate locations see the GSI C Developer's Guide.