[yocto-autobuilder2][RFC][PATCH] README-Guide.md: Add multi-node content, extra config info

* [yocto-autobuilder2][RFC][PATCH] README-Guide.md: Add multi-node content, extra config info
@ 2021-04-05 16:23 Trevor Gamblin
  2021-04-05 18:55 ` [yocto] " Michael Halstead
  0 siblings, 1 reply; 3+ messages in thread
From: Trevor Gamblin @ 2021-04-05 16:23 UTC (permalink / raw)
  To: yocto

Signed-off-by: Trevor Gamblin <trevor.gamblin@windriver.com>
---
 README-Guide.md | 94 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 94 insertions(+)

diff --git a/README-Guide.md b/README-Guide.md
index 21dd7c1..8558c48 100644
--- a/README-Guide.md
+++ b/README-Guide.md
@@ -43,6 +43,16 @@ yocto-controller/yoctoabb
 yocto-worker
 ```
 
+Before proceeding, make sure that the following is added to the
+pokybuild3 user's exports (e.g. in .bashrc), or builds will fail after
+being triggered:
+
+```
+export LC_ALL=en_US.UTF-8
+export LANG=en_US.UTF-8
+export LANGUAGE=en_US.UTF-8
+```
+
 Next, we need to update the `yocto-controller/yoctoabb/master.cfg` towards the bottom where the `title`, `titleURL`, and `buildbotURL` are all set.  This is also where you would specify a different password for binding workers to the master.
 
 Then, we need to update the `yocto-controller/yoctoabb/config.py` to include our worker.  In that file, find the line where `workers` is set and add: ["example-worker"].  _NOTE:_ if your worker's name is different, use that here.  Section 3.1 discusses how to further refine this list of workers.
@@ -112,6 +122,90 @@ sudo /home/pokybuild3/yocto-worker/qemuarm/build/scripts/runqemu-gen-tapdevs \
 
 In the above command, we assume the a build named qemuarm failed.  The value of 8 is the number of tap interfaces to create on the worker.
 
+### 1.3) Adding Dedicated Worker Nodes
+
+Running both the controller and the worker together on a single machine
+can quickly result in long build times and an unresponsive web UI,
+especially if you plan on running any of the more comprehensive builders
+(e.g. a-full). Additional workers can be added to the cluster by
+following the steps given above, except that the yocto-controller steps
+do not need to be repeated. For example, to add a new worker
+"ala-blade51" to an Autobuilder cluster with a yocto-controller at the
+IP address 147.11.105.72:
+
+1. On the yocto-controller host, add the name of the new worker to a worker
+list (or create a new one) e.g. 'workers_wrlx = ["ala-blade51"]' and
+make sure that it is added to the "workers" list.
+
+2. On the new worker node:
+
+```
+sudo apt-get install gawk wget git-core diffstat unzip texinfo \
+gcc-multilib build-essential chrpath socat cpio python python3 \
+python3-pip python3-pexpect xz-utils debianutils iputils-ping \
+libsdl1.2-dev xterm
+
+sudo pip3 install buildbot buildbot-www buildbot-waterfall-view \
+buildbot-console-view buildbot-grid-view buildbot-worker
+
+useradd -m --system pokybuild3
+cd /home/pokybuild3
+mkdir -p git/trash
+buildbot-worker create-worker -r --umask=0o22 yocto-worker 147.11.105.72 ala-blade51 pass
+chown -R pokybuild3:pokybuild3 /home/pokybuild3
+```
+
+ > Note 1: The URL/IP given to the create-worker command must match the
+host running the yocto-controller.
+
+ > Note 2: The "pass" argument given to the create-worker command must
+match the common "worker_pass" variable set in yocto-controller/yoctoabb/config.py.
+
+
+### 1.4) Configuring NFS for the Autobuilder Cluster
+
+The Yocto Autobuilder relies on NFS to distribute a common sstate cache
+and other outputs between nodes. A similar configuration can be
+deployed by performing the steps given below, which were written for
+Ubuntu 18.04.In order for both the controller and worker nodes to be able 
+to access the NFS share without issue, the "pokybuild3" user on all 
+systems must have the same UID/GID, or sufficient permissions must be 
+granted on the /srv/autobuilder path (or wherever you modified the config 
+files to point to). The following instructions assume a controller node
+at 147.11.105.72 and a single worker node at 147.11.105.71, but
+additional worker nodes can be added as needed (see the previous
+section).
+
+1. On the NFS host:
+
+```
+sudo apt install -y nfs-kernel-server
+sudo mkdir -p /srv/autobuilder/autobuilder.yoctoproject.org/pub/sstate
+sudo chown -R pokybuild3:pokybuild3 /srv
+```
+2. Add the following to /etc/exports, replacing the path and IP fields
+   as necessary for each client node:
+```
+/srv/autobuilder/autobuilder.yoctoproject.org/pub/sstate 147.11.105.71(rw,sync,no_subtree_check)
+```
+
+3. Run
+```
+sudo systemctl restart nfs-kernel-server
+```
+
+4. Adjust the firewall (if required). Example:
+```
+sudo ufw allow from 147.11.105.71 to any port nfs
+```
+
+5. On the client node(s):
+```
+sudo mkdir -p /srv/autobuilder/autobuilder.yoctoproject.org/pub/sstate
+sudo chown -R pokybuild3:pokybuild3 /srv/autobuilder/
+sudo mount 147.11.105.72:/srv/autobuilder/autobuilder.yoctoproject.org/pub/sstate /srv/autobuilder/autobuilder.yoctoproject.org/pub/sstate
+```
+
 ## 2) Basics
 
 This section is an overview of operation and a few basic configuration file relationships.  See Section 3 for more detailed instructions.
-- 
2.30.2


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