Building OPA

Building OPA

The instructions specify the steps to build OPA version 0.63.0 on Linux on IBM Z for following distributions:

• RHEL (8.6, 8.8, 8.9, 9.0, 9.2, 9.3)
• SLES (15 SP5)
• Ubuntu (20.04, 22.04. 23.10)

General Notes:

• When following the steps below please use a standard permission user unless otherwise specified.
• A directory /<source_root>/ will be referred to in these instructions, this is a temporary writable directory anywhere you'd like to place it.

Step 1: Build environment set up

Ensure that Docker-CE is installed.

Ensure the current user belongs to group docker.

Use the below command to add group docker if it does not exist:

sudo groupadd docker

Use the below command to add current user to group docker if it has not been done:

sudo usermod -aG docker $USER && newgrp docker

Step 2: Build using script

If you want to build OPA using manual steps, go to STEP 3.

Use the following commands to build OPA using the build script. Please make sure you have wget installed.

wget https://raw.githubusercontent.com/linux-on-ibm-z/scripts/master/OPA/0.63.0/build_opa.sh

# Build OPA
bash build_opa.sh   [Provide -t option for executing build with tests]

If the build and tests complete successfully, go to STEP 6. In case of error, check logs at <source_root>/logs/ for more details or go to STEP 3 to follow manual build steps.

Step 3: Install the system dependencies

export SOURCE_ROOT=/<source_root>/

• RHEL (8.6, 8.8, 8.9, 9.0, 9.2, 9.3)

  sudo yum install -y yum install -y gcc git make python3 python3-pip tar wget

• SLES 15 SP5

  sudo zypper refresh
  sudo zypper install -y gcc git make python3 python3-pip tar wget

• Ubuntu (20.04, 22.04, 23.10)

  sudo apt-get update
  sudo apt-get install -y gcc git make python3 python3-pip tar wget

Step 4: Install prerequisites

4.1) Install Go 1.22.1

GO_VERSION=1.22.1
wget -q https://storage.googleapis.com/golang/go"${GO_VERSION}".linux-s390x.tar.gz
chmod ugo+r go"${GO_VERSION}".linux-s390x.tar.gz
sudo rm -rf /usr/local/go /usr/bin/go
sudo tar -C /usr/local -xzf go"${GO_VERSION}".linux-s390x.tar.gz
sudo ln -sf /usr/local/go/bin/go /usr/bin/
sudo ln -sf /usr/local/go/bin/gofmt /usr/bin/
sudo ln -sf /usr/bin/gcc /usr/bin/s390x-linux-gnu-gcc  # Rhel and Sles only
go version

4.2) Install wasmtime library

cd $SOURCE_ROOT
mkdir golang-wasmtime && cd golang-wasmtime
wget https://github.com/bytecodealliance/wasmtime/releases/download/v3.0.1/wasmtime-v3.0.1-s390x-linux-c-api.tar.xz
tar xf wasmtime-v3.0.1-s390x-linux-c-api.tar.xz
sudo cp wasmtime-v3.0.1-s390x-linux-c-api/lib/libwasmtime.a /usr/lib

# Build toolchain image
wget https://raw.githubusercontent.com/linux-on-ibm-z/scripts/master/OPA/0.63.0/patch/golang-wasmtime.Dockerfile
docker build -t golang-wasmtime:1.22.1-bullseye -f ./golang-wasmtime.Dockerfile .

Step 5: Build OPA

5.1) Build OPA from source

cd $SOURCE_ROOT
wget https://raw.githubusercontent.com/linux-on-ibm-z/scripts/master/OPA/0.63.0/patch/opa.diff
git clone -b v0.63.0 https://github.com/open-policy-agent/opa.git
cd opa
git apply --ignore-whitespace ../opa.diff
make ci-go-ci-build-linux

Note: In case of errors encountered while cloning the OPA repository, you might try increasing the POST buffer size:

git config --global http.postBuffer 1048576000
git config --global https.postBuffer 1048576000

5.2) Build OPA Docker image

cd $SOURCE_ROOT/opa
make image-s390x

5.3) Run OPA unit tests (Optional)

cd $SOURCE_ROOT/opa
make test

Step 6: Verify build is successful (Optional)

cd $SOURCE_ROOT/opa
./_release/0.63.0/opa_linux_s390x run

Please refer to Running OPA for more information

References

• https://www.openpolicyagent.org/docs/latest/contrib-development/