Creating an Installation Manager on z/OS for installing IBM HTTP Server

You can create one or more Installation Managers on your z/OS® system to install and maintain software products.

Before you begin

In order to install WebSphere Application Server Version 8.5, your Installation Manager must be at Version 1.5.2 or later.

Install the fix for z/OS APAR OA34228 on each z/OS system that will run IBM Installation Manager to allow the copying of files with extended attributes.

Decide in which of the following modes you want to run the Installation Manager:

admin mode: In admin mode, the Installation Manager is installed from a superuser ID (uid=0) and can be invoked from any superuser ID. There can only be one admin-mode Installation Manager on a system.

user mode: In user mode (also called nonAdmin mode), the Installation Manager can be invoked only by the user that installed it. There can only be one user-mode Installation Manager for a user.

group mode: In group mode, the Installation Manager can be invoked by any user ID that is connected to the owning group for the Installation Manager (the default group of the user ID that creates it). There is no limit to the number of group-mode Installation Managers that you can have on a system.

The Installation Manager will consist of two sets of files—a set of executable files that are copied or updated from the installation kit, and a set of runtime data files that describe the products installed by this Installation Manager. Both sets of files must be writeable by the Installation Manager. You must select locations for both the executable and runtime data for each Installation Manager.

Table 1. Default locations for Installation Manager files. The following table shows the default locations for the Installation Manager executable files (binaries) and runtime data on z/OS.
Files	Admin or group mode	User mode
Binaries	`/InstallationManager/bin`	`$HOME/InstallationManager/bin`
Runtime data (also called agent data)	`/InstallationManager/appdata`	`$HOME/InstallationManager/appdata`

These locations are assumed in the Installation Manager documentation and sample jobs. If these names are not appropriate for your system or if you choose to have several Installation Managers, you can choose different names and specify them when you create the Installation Manager.

Procedure

Make sure that the fix for z/OS APAR OA34228 is installed on your z/OS system.
Create a user ID and group to own the Installation Manager.
This user ID must have the following attributes:
- Read/write home directory
- Read access to FACILITY profile BPX.FILEATTR.APF
- Read access to FACILITY profile BPX.FILEATTR.PROGCTL
- Read access to FACILITY profile BPX.FILEATTR.SHARELIB
- Read access to UNIXPRIV profile SUPERUSER.FILESYS.CHOWN or CHOWN.UNRESTRICTED
- Read access to UNIXPRIV profile SUPERUSER.FILESYS.CHANGEPERMS
The user ID that creates the Installation Manager will become the initial (possibly only) user ID that can invoke that particular Installation Manager. If you create an Installation Manager in group mode, the default group for this user will become the owning group for the Installation Manager. This user ID must have a read/write home directory.

You can use an existing user ID if it meets these requirements.

If you installed the Installation Manager installation kit with SMP/E, you can use the Installation Manager sample job GIN2ADMN in SGINJCL to create this user ID and group as well as to assign appropriate permissions.

When you invoke a group mode Installation Manager, your effective group must be the same as the group that created the Installation Manager.

It is no longer necessary to set your umask to allow group-write when invoking a group-mode Installation Manager. Instead, an Installation Manager running in group mode will turn on group-write by default then reset the umask to its previous value when Installation Manager processing is complete.
If the Installation Manager binaries and runtime data will not reside in existing read/write file systems, create file systems for the data and mount the file systems read/write.

The file systems should be owned by the user ID and group that will create the Installation Manager and have permissions 755 for an admin or user-mode Installation Manager or 775 for a group-mode Installation Manager.

If you installed the Installation Manager installation kit with SMP/E, you can use the Installation Manager sample job GIN2CFS in SGINJCL to allocate and mount a file system to hold the binaries and runtime data.

The Installation Manager creation process creates the binaries and runtime data directories if they do not already exist.
Log in to the Unix system services shell under the owning user ID for the Installation Manager, and change the directory to the location of the Installation Manager installation kit.
```
cd /usr/lpp/InstallationManager/V1R4
```
The installation kit must be at Version 1.5.2 or later.
Run the installc, userinstc, or groupinstc command from the installation kit to create the Installation Manager.
- To create an Installation Manager in admin mode, issue the following command from the shell:
```
installc -acceptLicense 
  -installationDirectory binaries_location 
  -dataLocation appdata_location
```
- To create an Installation Manager in user mode, issue the following command from the shell:
```
userinstc -acceptLicense 
  -installationDirectory binaries_location 
  -dataLocation appdata_location
```
- To create an Installation Manager in group mode, issue the following command from the shell:
```
groupinstc  -acceptLicense
  -installationDirectory binaries_location 
  -dataLocation appdata_location
```
You can omit the -installationDirectory and -dataLocation parameters if you use the default locations.

If you used SMP/E to install the Installation Manager installation kit, you can use sample job GIN2INST in SGINJCL to create an Installation Manager.
You can now unmount the Installation Manager installation kit.

What to do next

You can verify that the Installation Manager is correctly installed by logging in to the Unix System Services shell under the user ID that created the Installation Manager and running the Installation Manager imcl command from the eclipse/tools subdirectory of the Installation Manager's binaries location. For example:

cd /InstallationManager/bin/eclipse/tools

imcl -version

You are now ready to install products using IBM® Installation Manager.

Authorizing additional users to a group-mode Installation Manager: To allow additional users to access a group-mode Installation Manager, make sure that they meet the requirements listed in the first step of the procedure described in the previous section and then connect them to the owning group for the Installation Manager using the TSO CONNECT command:

CONNECT user2 GROUP(IMGROUP)

To create an additional Installation Manager, follow the steps in the procedure described in the previous section, selecting a new user ID and group (if appropriate) and new binaries and runtime data locations. Do not share binaries or runtime data locations between separate Installation Managers.

Correcting file ownership or permission problems: If you accidentally invoke an Installation Manager from the wrong user ID, some files might end up with ownerships that prevent normal use of the Installation Manager. To correct this problem, log on to a super user or other privileged user ID and reset the file ownership and permissions for the Installation Manager binaries and runtime data. For example:

chown IMADMIN:IMGROUP /InstallationManager/bin
chmod 775 /InstallationManager/bin

chown IMADMIN:IMGROUP /InstallationManager/appdata
chmod 775 /InstallationManager/appdata

If the users of a group-mode Installation Manager do not have umask set to allow group-write permission on created files, you might also have to perform this step when switching from one user ID to another. You might also need to set permissions and owners for the product files that you install with the Installation Manager to ensure that maintenance can be performed from other user IDs in the group.

Upgrading the Installation Manager: To upgrade an Installation Manager to a new level of the Installation Manager product, download or install the new level of the IBM Installation Manager installation kit and mount it on your system. Then, change directory to the new level of the installation kit and reissue the same installc, userinstc, or groupinstc command that you used to create the Installation Manager. This will update the Installation Manager's binaries from the new installation kit.