README, minor structure improvements

README.md

@@ -0,0 +1,19 @@
+# Requirements:
+CentOS 7 vm equipped with 2 CPU cores and 2 disks: one main disk containing OS
+and an additional virtio disk containing docker images. Typically choose 5GB
+for size of each disk.
+
+# Tags
+- htcondor, singularity, docker, slurm
+- htcondor-containered, slurm-config
+
+Just update slurm config using --tags slurm-config.
+Full setup of just slurm using --skip-tags htcondor,singularity
+
+# Example: Setup SLURM
+First adjust inv.yml to you needs, specifying the hostname of your VM. Run:
+
+    ansible-playbook -i inv.yml --skip-tags htcondor,singularity play.yml
+
+Configuration goes into ```/container/volumes/slurm/slurm.conf``` generated
+from ```roles/slurm/templates/slurm.conf.j2```.

inv.yml

@@ -5,3 +5,10 @@ all:
       ansible_host: ed-c7-1.virt.magni.thoto.net
       ssh_args: -o ControlMaster=auto -o ControlPersist=60s
       # ansible_host: 192.168.122.139
+  children:
+    htcondor:
+      hosts:
+        ed-c7-1:
+    slurm:
+      hosts:
+        ed-c7-1:

play.yml

@@ -1,43 +1,54 @@
 ---
-- hosts: ed-c7-1
+- hosts: all
   tasks:
   - name: "install tools"
     yum:
       name: [ vim-enhanced, htop, screen, bind-utils, nmap-ncat, net-tools ]
       state: present
 
+- hosts: htcondor
+  pre_tasks:
   - name: "install htcondor repo"
     yum:
       name: https://research.cs.wisc.edu/htcondor/repo/8.9/htcondor-release-current.el7.noarch.rpm
       state: present
+    tags: htcondor
 
   - name: "install htcondor software "
     yum:
       name: htcondor-ce
       state: present
+    tags: htcondor
 
   - name: "remove minicondor configuration"
     yum:
       name: minicondor
       state: absent
+    tags: htcondor
 
   - name: "setup singularity"
     import_tasks: "singularity.yml"
     tags: singularity
 
+  roles:
   - name: "setup docker"
-    import_tasks: "docker_setup.yml"
+    role: docker
     tags: docker
 
   - name: "setup htcondor test environment in docker containers"
-    import_role:
+    role: docker-htcondor
-      name: docker-htcondor
+    tags:
-    tags: htcondor-containered
+      - htcondor-containered
+      - htcondor
 
-  - name: "setup slurm test environment in docker containers"
+- hosts: slurm
-    import_role:
-      name: slurm
   vars:
     container_privileged: True
     num_nodes: 3
+  roles:
+  - name: "setup docker"
+    role: docker
+    tags: docker
+  - name: "setup slurm test environment in docker containers"
+    role: slurm
     tags: slurm