add readme

README.md

+# Tivoli Storage Manager aka IBM Spectrum Protect -- RWTH Edition
+
+Deployment of TSM software and configuration, adhering to the specifics at RWTH Aachen.
+
+## Roles
+
+- `tsm-archive`, configures the software for archival purposes
+- `tsm-backup`, configure the software for backup purposes
+- `tsm-client`, installs software and ensures a compatible environment
+
+`tsm-client` is a dependency of the other roles and does not need manual inclusion in playbooks.
+
+*Note:* The backup and archive functionality are mutual exclusive.
+
+## Variables
+
+- `tsm_name`, name of backup/archive node
+- `tsm_node`, number of tsm server
+- `tsm_port`, optional (dervied from server number)
+- `tsm_repo`, repository containing tsm packages
+- `tsm_repo_pubkey`, the repository's public key
+- `tsm_backup_domains`, adds directories to backup
+- `tsm_backup_virtual`, must include all domains which are NOT mountpoints
+- `tsm_backup_includes`, include additional files
+- `tsm_backup_excludes`, exclude files
+- `tsm_backup_include_dirs`, include addtional directories
+- `tsm_backup_exclude_dirs`, exclude directories
+
+`tsm_backup_*` have defaults.
+