mirror of
https://github.com/projectcapsule/capsule.git
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9ebbbed785
* chore: name change for webhook names Signed-off-by: Oliver Bähler <oliverbaehler@hotmail.com> * chore: remove apidocs Signed-off-by: Oliver Bähler <oliverbaehler@hotmail.com> * feat(helm): implement crd lifecycle and values consistency Signed-off-by: Oliver Bähler <oliverbaehler@hotmail.com> * chore: change default group name Signed-off-by: Oliver Bähler <oliverbaehler@hotmail.com> --------- Signed-off-by: Oliver Bähler <oliverbaehler@hotmail.com>
119 lines
3.3 KiB
Bash
Executable File
119 lines
3.3 KiB
Bash
Executable File
#!/bin/bash
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# This script uses Kubernetes CertificateSigningRequest (CSR) to generate a
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# certificate signed by the Kubernetes CA itself.
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# It requires cluster admin permission.
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#
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# e.g.: ./create-user-openshift.sh alice oil
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# where `oil` is the Tenant and `alice` the owner
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# Exit immediately if a command exits with a non-zero status.
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set -e
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# Check if OpenSSL is installed
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if [[ ! -x "$(command -v openssl)" ]]; then
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echo "Error: openssl not found"
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exit 1
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fi
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# Check if kubectl is installed
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if [[ ! -x "$(command -v kubectl)" ]]; then
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echo "Error: kubectl not found"
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exit 1
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fi
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# Check if oc is installed
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if [[ ! -x "$(command -v oc)" ]]; then
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echo "Error: kubectl not found"
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exit 1
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fi
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USER=$1
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TENANT=$2
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GROUP=$3
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if [[ -z ${USER} ]]; then
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echo "User has not been specified!"
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exit 1
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fi
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if [[ -z ${TENANT} ]]; then
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echo "Tenant has not been specified!"
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exit 1
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fi
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if [[ -z ${GROUP} ]]; then
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GROUP=projectcapsule.dev
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fi
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TMPDIR=$(mktemp -d)
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echo "creating certs in TMPDIR ${TMPDIR} "
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MERGED_GROUPS=$(echo "/O=$GROUP" | sed "s/,/\/O=/g")
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echo "merging groups ${MERGED_GROUPS}"
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openssl genrsa -out ${TMPDIR}/tls.key 2048
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openssl req -new -key ${TMPDIR}/tls.key -subj "/CN=${USER}${MERGED_GROUPS}" -out ${TMPDIR}/${USER}-${TENANT}.csr
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# Clean any previously created CSR for the same user.
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kubectl delete csr ${USER}-${TENANT} 2>/dev/null || true
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#
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# Create a new CSR file.
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#
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if [ $(kubectl version -o json | jq -r .serverVersion.minor) -gt 19 ]; then
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cat <<EOF > ${TMPDIR}/${USER}-${TENANT}-csr.yaml
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apiVersion: certificates.k8s.io/v1
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kind: CertificateSigningRequest
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metadata:
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name: ${USER}-${TENANT}
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spec:
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signerName: kubernetes.io/kube-apiserver-client
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groups:
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- system:authenticated
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request: $(cat ${TMPDIR}/${USER}-${TENANT}.csr | base64 | tr -d '\n')
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usages:
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- digital signature
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- key encipherment
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- client auth
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EOF
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else
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cat <<EOF > ${TMPDIR}/${USER}-${TENANT}-csr.yaml
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apiVersion: certificates.k8s.io/v1beta1
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kind: CertificateSigningRequest
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metadata:
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name: ${USER}-${TENANT}
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spec:
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groups:
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- system:authenticated
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request: $(cat ${TMPDIR}/${USER}-${TENANT}.csr | base64 | tr -d '\n')
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usages:
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- digital signature
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- key encipherment
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- client auth
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EOF
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fi
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# Create the CSR
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kubectl apply -f ${TMPDIR}/${USER}-${TENANT}-csr.yaml
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# Approve and fetch the signed certificate
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# In OCP why must use oc adm certificate approve
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oc adm certificate approve ${USER}-${TENANT}
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kubectl get csr ${USER}-${TENANT} -o jsonpath='{.status.certificate}' | base64 --decode > ${TMPDIR}/tls.crt
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# Create the kubeconfig file
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CONTEXT=$(kubectl config current-context)
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CLUSTER=$(kubectl config view -o jsonpath="{.contexts[?(@.name == \"$CONTEXT\"})].context.cluster}")
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SERVER=$(kubectl config view -o jsonpath="{.clusters[?(@.name == \"${CLUSTER}\"})].cluster.server}")
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#create context for the new user:
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oc config set-credentials ${USER} --client-certificate=${TMPDIR}/tls.crt --client-key=${TMPDIR}/tls.key --embed-certs --kubeconfig=${USER}-${TENANT}.kubeconfig
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#set current context for new user
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oc config set-context ${USER} --cluster=$(oc config view -o jsonpath='{.clusters[0].name}') --namespace=default --user=${USER} --kubeconfig=${USER}-${TENANT}.kubeconfig
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echo "kubeconfig file is:" ${USER}-${TENANT}.kubeconfig
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echo "to use it as ${USER}: 'oc config use-context ${USER} --kubeconfig=${USER}-${TENANT}.kubeconfig'"
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