If you are using Homebrew, you can install the SDK CLI tool with the following command:
$ brew install operator-sdk
# Set the release version variable
$ RELEASE_VERSION=v0.12.0
# Linux
$ curl -LO https://github.com/operator-framework/operator-sdk/releases/download/${RELEASE_VERSION}/operator-sdk-${RELEASE_VERSION}-x86_64-linux-gnu
# macOS
$ curl -LO https://github.com/operator-framework/operator-sdk/releases/download/${RELEASE_VERSION}/operator-sdk-${RELEASE_VERSION}-x86_64-apple-darwin
# Linux
$ curl -LO https://github.com/operator-framework/operator-sdk/releases/download/${RELEASE_VERSION}/operator-sdk-${RELEASE_VERSION}-x86_64-linux-gnu.asc
# macOS
$ curl -LO https://github.com/operator-framework/operator-sdk/releases/download/${RELEASE_VERSION}/operator-sdk-${RELEASE_VERSION}-x86_64-apple-darwin.asc
To verify a release binary using the provided asc files, place the binary and corresponding asc file into the same directory and use the corresponding command:
# Linux
$ gpg --verify operator-sdk-${RELEASE_VERSION}-x86_64-linux-gnu.asc
# macOS
$ gpg --verify operator-sdk-${RELEASE_VERSION}-x86_64-apple-darwin.asc
If you do not have the maintainers public key on your machine, you will get an error message similar to this:
$ gpg --verify operator-sdk-${RELEASE_VERSION}-x86_64-apple-darwin.asc
$ gpg: assuming signed data in 'operator-sdk-${RELEASE_VERSION}-x86_64-apple-darwin'
$ gpg: Signature made Fri Apr 5 20:03:22 2019 CEST
$ gpg: using RSA key <KEY_ID>
$ gpg: Can't check signature: No public key
To download the key, use the following command, replacing $KEY_ID
with the RSA key string provided in the output of the previous command:
$ gpg --recv-key "$KEY_ID"
You'll need to specify a key server if one hasn't been configured. For example:
$ gpg --keyserver keyserver.ubuntu.com --recv-key "$KEY_ID"
Now you should be able to verify the binary.
# Linux
$ chmod +x operator-sdk-${RELEASE_VERSION}-x86_64-linux-gnu && sudo mkdir -p /usr/local/bin/ && sudo cp operator-sdk-${RELEASE_VERSION}-x86_64-linux-gnu /usr/local/bin/operator-sdk && rm operator-sdk-${RELEASE_VERSION}-x86_64-linux-gnu
# macOS
$ chmod +x operator-sdk-${RELEASE_VERSION}-x86_64-apple-darwin && sudo mkdir -p /usr/local/bin/ && sudo cp operator-sdk-${RELEASE_VERSION}-x86_64-apple-darwin /usr/local/bin/operator-sdk && rm operator-sdk-${RELEASE_VERSION}-x86_64-apple-darwin
$ go get -d github.com/operator-framework/operator-sdk # This will download the git repository and not install it
$ cd $GOPATH/src/github.com/operator-framework/operator-sdk
$ git checkout master
$ make tidy
$ make install