Playbooks

deployment to a clean infrastructure

General remarks:

GCP does not route any traffic to your services unless the service is "healthy". It might take a few minutes after startup before the services is classified as healthy. Until then you will only see some generic error message.

These are the steps to set up the build server on a clean infrastructure:

Configure the tools on your local machine:
```
./local_setup.sh
```

Delete the old cluster, if it still exists:

cd kubernetes/cluster
./cluster_delete.sh

Create the cluster:

cd kubernetes/cluster
./cluster_create.sh

Create the disk storage, if it does not yet exist:
```
cd kubernetes/cluster
./disk_create.sh
```

SSH into the VM instance mounting the volume, find the mount point and then set

# go to the mount point of the volume
cd  /var/lib/kubelet/plugins/kubernetes.io/gce-pd/mounts/jenkins-home
# change the permissions
sudo chmod a+rwx

Push the docker images to gcr.io:

cd containers
#for each subfolder:
./build_deploy.sh <foldername>

Deploy the stack:
```
cd kubernetes
./deploy.sh
```
Configure it

creating basic authentication for reverse proxy

create auth file, based on ingress-nginx documentation

cd kubernetes/reverse-proxy
htpasswd -c auth <username>
# enter password at prompt
# add more users as required
kubectl create secret generic proxy-auth --from-file=auth --namespace=jenkins

Creating docker containers on Windows

If you want to build/update/test docker container for Windows, you need to do this on a Windows machine. Here are the instructions to set up such a machine on GCP.

Pick a GCP Windows image with Desktop Support.
- pick a "persistent SSD" as boot Disk. This is much faster
- Add a "local scratch SSD" and use it as you workspace. This is much faster.
Format the local SSD partition and use it as workspace.
install Chocolately.
Install git: choco install -y git
Install docker-Desktop (requires docker account)
- select "use Windows containers" during installation
- note: The installation via Chocolately might not work. So do this manually.
optional: install apps to help you work in the machine:

choco install -y googlechrome vscode

Log out of the machine and log back in.
Repeast until success:
1. Start "Docker Desktop" and let it install it's dependencies. Then reboot manually, when the error message pops up.
2. If you have trouble with the machine name: try to shorten it to 16 chars.
Contigure the Docker credentials for GCP:

gcloud components install docker-credential-gcr
docker-credential-gcr configure-docker

To build and run the current agent run:

git clone https://github.com/google/llvm-premerge-checks
cd llvm-premerge-checks\containers
powershell .\build_run.ps1 agent-windows-jenkins

To push push a new container run in containers:

powershell .\build_deploy.ps1 <container-folder>

Spawning a new windows agent

To spawn a new windows agent:

Go to the GCP page and pick a new number for the agent.
Update the machine name in kubernetes/windows_agent_create.sh.
Run kubernetes/windows_agent_create.sh
Go to the GCP page again
login to the new machine via RDP (you probably need to set the i).
In the RDP session: run these commands in the CMD window to start the docker container:

powershell 
Invoke-WebRequest -uri 'https://raw.githubusercontent.com/google/llvm-premerge-checks/master/kubernetes/windows_agent_bootstrap.ps1' -OutFile windows_agent_bootstrap.ps1
.\windows_agent_bootstrap.ps1

Testing scripts locally

Build and run agent docker image sudo build_run.sh agent-debian-testing-clang8-ssd /bin/bash.

Within a container set environment variables similar to pipeline.

Additionally set WORKSPACE, PHID and DIFF_ID parameters. Set CONDUIT_TOKEN with your personal one from https://reviews.llvm.org/settings/user/<USERNAME>/page/apitokens/.

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