diff --git a/README.md b/README.md
index 24cdea2..7bb6277 100644
--- a/README.md
+++ b/README.md
@@ -1,221 +1,237 @@
 c4science.ch
 =========
 
 * Ansible playbook for git infrastructure on openstack
 
 INSTALL
 -------
 
 * Dependencies. You need ansible >= 2.0
 
 ```
 cd ~
 git clone https://github.com/ansible/ansible.git
 cd ansible
 git submodule update --init --recursive
 sudo python setup.py install
 sudo pip install shade python-novaclient
 ```
 
 * Repo
 
 ```
   git clone repourl c4science.ch
   cd c4science.ch
   git submodule update --init --recursive
 ```
 
 USAGE
 -----
 
 * How to use,
 
 ```
   make status #list instances
   make up #create instances
   make clean #destroy instances
 ```
 
 * You must configure SSH so the connections go trough the jump server
 
 ~/.ssh/config
 ```
 Host EXTERNAL_IP
     HostName c4science.ch-jump01
     User centos
     StrictHostKeyChecking no
     UserKnownHostsFile=/dev/null
 
 Host 10.0.*
     User centos
     ProxyCommand ssh c4science.ch-jump01 nc %h %p
     StrictHostKeyChecking no
     UserKnownHostsFile=/dev/null
 ```
 ```
 echo 'EXTERNAL_IP   c4science.ch-jump01' >> /etc/hosts
 ```
 
 * You must create floating IPs
   * One on region_main and put it in external_ip in vars/main.yml
   * One on region_back and put it in backup_ip in vars/main.yml
 
 * You must create a Switch Engines bucket
     * see https://help.switch.ch/engines/documentation/s3-like-object-storage/
 
 ```
   ./s3cmd mb s3://phabricator
 ```
 
 * You have to copy ssh hostkeys for app servers, so they are all the same
 
 ```
 rsync -av c4science.ch-app01:/etc/ssh/ssh_host_*_key /tmp/
 rsync -av /tmp/ssh_host_*_key c4science.ch-app0X:/etc/ssh/
 ssh c4science.ch-app0X 'service sshd_phabricator restart'
 ```
 
 * Create a ssh-key without password in app00 and copy the public key to the backup server (root user)
 
 Build the Jenkins slave docker image
 ------------------------------------
 
 * On a slave
 ```
 docker pull evarga/jenkins-slave
 docker run -i -t evarga/jenkins-slave /bin/bash
 ```
 
 * On the docker image
 
 ```
 apt-get update
-apt-get install bash-completion build-essential cmake git subversion mercurial
+apt-get install bash-completion build-essential cmake git subversion mercurial php5-cli php5-curl
 apt-get clean
 mkdir /home/jenkins/workspace
 chown jenkins.jenkins /home/jenkins/workspace
+cd /opt
+git clone https://github.com/phacility/arcanist.git
+git clone https://github.com/phacility/libphutil.git
+ln -s /opt/arcanist/bin/arc /usr/local/bin/arc
+# Generate a token from the webinterface for a bot user
+# then add this configuration in /home/jenkins/.arcrc
+#{
+#  "hosts": {
+#    "https://c4science.ch/api/": {
+#      "token": "api-YOURTOKEN"
+#    }
+#  },
+#  "config": {
+#    "default": "https://c4science.ch"
+#  }
+#}
 exit
 ```
 
 * On a slave
 ```
 docker images
 docker commit IMAGEID jenkins-1
 docker rm $(docker ps -a -q)
 ```
 
 SCALING UP
 ----------
 
 ### Database
 
 * Add a database node in tasks/create-instances.yml by an numbered item both in the os_server and add_host actions
 # Patch example
 ```
 diff --git a/tasks/create-instances.yml b/tasks/create-instances.yml
 index 3037cc0..a6ac097 100644
 --- a/tasks/create-instances.yml
 +++ b/tasks/create-instances.yml
 @@ -79,6 +79,7 @@
        - 0
        - 1
        - 2
 +      - 3
  
  - add_host: 
      name: "{{ openstackdb.results[item].openstack.private_v4 }}" 
 @@ -89,6 +90,7 @@
        - 0
        - 1
        - 2
 +      - 3
  
  - name: Create Monitoring instance
    os_server:
 ```
 * Run init playbook: `make init`
 * Check that the node joined galera replication: `mysql -e "SHOW STATUS LIKE 'wsrep_cluster_size';"`
 * Even number of dbs instances is not recommended, you can use the arbitrator to have one more node using `make arbitrator`on the monit node
 
 ### Web/storage
 
 * Add an app node in tasks/create-instances.yml by an numbered item both in the os_server and add_host actions
 * Run init playbook: `make init`
 * Check that gluster is working: `gluster volume info`
 
 ### Scaling down
 
 * Stop the instance with: `nova stop <instanceid>`
 * Remove the instance from the configuration file tasks/create-instance.yml
 * Run init playbook: `make init`
 * Eventually delete the instance: `nova delete <instanceid>`
 * The volume is still available, and can be reused
 
 TODO
 ----
 
 * Shibboleth auth
 * Haproxy redundancy using keepalived https://raymii.org/s/articles/Building_HA_Clusters_With_Ansible_and_Openstack.html
 
 TEST
 ----
 
 * Replication information
 
 ```
     mysql -e "SHOW STATUS LIKE 'wsrep_cluster%';"
 ```
 
 * Some benchmarking examples,
 
 ```
 ## GIT Read
 cd /tmp
 parallel -j 10 git clone ssh://git@c4science.ch:2222/diffusion/TEST/test.git \
     -- $(for i in $(seq 20); do echo test$i; done) 1> /dev/null
 ```
 ## GIT Write sequential
 ```
 cd /tmp
 git clone ssh://git@c4science.ch:2222/diffusion/TEST/test.git
 for i in {1..10}; do
     time sh -c "echo 'test' >> README.md;
                 git commit -am 'test';
                 git push" &>/dev/null
 done
 ```
 ```
 ## Conduit API (create repo from remote)
 REPO=$(echo {A..Z})
 # Create some repositories
 for i in $REPO; do
     echo "{\"name\":\"test\", \"callsign\": \"TEST$i\", \"vcs\": \"git\", \"uri\": \"https://git.epfl.ch/repo/repo-test.git\"}" \
         | arc call-conduit repository.create
 done
 
 # Clone them (doesnt work)
 #cd /tmp
 #for i in $REPO; do
 #    git clone ssh://git@c4science.ch:2222/diffusion/TEST$i/test.git test$i
 #done
 # Test commit and push
 #parallel -i -j 10 sh -c 'cd test{};
 #    echo "TEST" > README.md;
 #    git commit -am "test";
 #    git push' -- $(echo $REPO)
 ```
 ```
 ## GIT test lock
 parallel -i -j 5 sh -c 'cd test{};
     git pull --no-edit;
     git commit -am "merge conflicts";
     echo "* TEST" >> README.md;
     git commit -am "test";
     git push || git pull --no-edit;
     git push' -- $(seq 50)
 ```
 ```
 ## HTTP
 ab -C phsid:COOK -C phusr:admin -n 1000 \
     -c 10 https://c4science.ch/diffusion/TEST/repository/master/
 ```