videobridge-installation.md

@@ -4,12 +4,16 @@ Follow [Jitsi Load balancing guide](https://github.com/jitsi/jicofo/blob/master/
 
 This has been deployed on several machines, see https://git.fairkom.net/hosting/fairmeeting/issues/42 . Bare metal preferred.
 
-Prepare videobridge servers with ansible playbook `hardening.yml` (in `/etc/ansible`). MAy 
-require: `apt-get install python-apt`.
+### Prepare server
 
-Change `hosts` and test first with `ansible all -m ping` from your laptop.
+rename server to bridgeN in `/etc/hosts` and `/etc/hostname` and reboot
 
-After that check SSH port an do a `sshd -t` after running the script so you do not lock yourself out! You might need to add: 
+apply ansible playbook `hardening.yml` (in `/etc/ansible`). May 
+require: ~~python `apt-get install python-apt` or~~ `ln --symbolic /usr/bin/python3 /usr/bin/python`
+
+Change `/ansible/hosts` and test first with `ansible all -m ping` from your laptop. Then run with `ansible-playbook playbook.yml`
+
+After that check SSH port an do a `sshd -t` after running the script so you do not lock yourself out! You better add missing keys: 
 
 `/usr/bin/ssh-keygen -A` or do each manually:
 
@@ -90,6 +94,7 @@ JVB_OPTS="--apis=rest,xmpp --subdomain=jvb-HOSTINGPARTNER-0"
 
 In `/etc/systemd/system.conf` add     
 ```
+# jitsi performance
 DefaultLimitNOFILE=65000
 DefaultLimitNPROC=65000
 DefaultTasksMax=65000
@@ -108,8 +113,8 @@ net.core.netdev_max_backlog=100000
 
 # increase Linux autotuning TCP buffer limits
 # min, default, and max number of bytes to use
-net.ipv4.tcp_mem = 382089 509452 764178
-net.ipv4.tcp_rmem = 4096 87380 4194304
+net.ipv4.tcp_mem = 382401 509869 764802
+net.ipv4.tcp_rmem = 4096 131072	6291456
 net.ipv4.tcp_wmem = 4096 16384 4194304
 
 # increase Linux autotuning UDP buffer limits