FEATURE: Docker image for creating Helm secrets

This change adds a docker image that generates Kubernetes
secrets from TLS keys and certificates; it is primarily
intended for use with TLS-enabled helm/tiller.

Signed-off-by: dave kormann <dk3239@att.com>
Change-Id: I850b8c9cd24abf260abde8be5ed4331807f8856f

diff --git a/ric-infra/25-tiller/docker/Dockerfile b/ric-infra/25-tiller/docker/Dockerfile
new file mode 100644 (file)
index 0000000..5883e03
--- /dev/null
+++ b/ric-infra/25-tiller/docker/Dockerfile
@@ -0,0 +1,36 @@
+#   Copyright (c) 2019 AT&T Intellectual Property.
+#   Copyright (c) 2019 Nokia.
+#
+#   Licensed under the Apache License, Version 2.0 (the "License");
+#   you may not use this file except in compliance with the License.
+#   You may obtain a copy of the License at
+#
+#       http://www.apache.org/licenses/LICENSE-2.0
+#
+#   Unless required by applicable law or agreed to in writing, software
+#   distributed under the License is distributed on an "AS IS" BASIS,
+#   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#   See the License for the specific language governing permissions and
+#   limitations under the License.
+FROM alpine
+
+MAINTAINER "RIC"
+
+LABEL name="A container with support for creating Kubernetes SSL secrets"
+
+RUN apk update
+
+RUN apk add openssl
+
+# unfortunately not available by itself in apk
+ADD https://storage.googleapis.com/kubernetes-release/release/v1.14.1/bin/linux/amd64/kubectl /bin/kubectl
+RUN chmod +x /bin/kubectl
+
+COPY bin/cert-gen.sh /bin/cert-gen.sh
+COPY bin/svcacct-to-kubeconfig.sh /bin/svcacct-to-kubeconfig.sh
+COPY bin/tls-secrets.sh /tls-secrets.sh
+
+RUN mkdir /pki
+
+CMD /tls-secrets.sh
+

diff --git a/ric-infra/25-tiller/docker/bin/cert-gen.sh b/ric-infra/25-tiller/docker/bin/cert-gen.sh
new file mode 100755 (executable)
index 0000000..29fba98
--- /dev/null
+++ b/ric-infra/25-tiller/docker/bin/cert-gen.sh
@@ -0,0 +1,84 @@
+#!/bin/sh
+
+#   Copyright (c) 2019 AT&T Intellectual Property.
+#   Copyright (c) 2019 Nokia.
+#
+#   Licensed under the Apache License, Version 2.0 (the "License");
+#   you may not use this file except in compliance with the License.
+#   You may obtain a copy of the License at
+#
+#       http://www.apache.org/licenses/LICENSE-2.0
+#
+#   Unless required by applicable law or agreed to in writing, software
+#   distributed under the License is distributed on an "AS IS" BASIS,
+#   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#   See the License for the specific language governing permissions and
+#   limitations under the License.
+
+dnBase=${CERT_DN:-'/C=US/O=O-RAN Alliance/OU=O-RAN Software Community'}
+keyBits=${KEY_BITS:-4096}
+
+CAHome=${CA_DIR:-'/pki'}
+CADays=${CA_CERT_EXPIRY:-9125}
+CAKey=${CAHome}/${CA_KEY_NAME:-ca.key.pem}
+CACert=${CAHome}/${CA_CERT_NAME:-ca.cert.pem}
+#
+CertHome=${CERT_DIR:-$CAHome}
+#
+TillerDays=${TILLER_CERT_EXPIRY:-3650}
+TillerKey=${CertHome}/${TILLER_KEY_NAME:-tiller.key.pem}
+TillerCert=${CertHome}/${TILLER_CERT_NAME:-tiller.cert.pem}
+TillerCN=${TILLER_CN:-tiller}
+#
+HelmDays=${HELM_CERT_EXPIRY:-3650}
+HelmKey=${CertHome}/${HELM_KEY_NAME:-helm.key.pem}
+HelmCert=${CertHome}/${HELM_CERT_NAME:-helm.cert.pem}
+HelmCN=${HELM_CN:-helm}
+
+# 1. CA
+if [ ! -d ${CAHome} ]; then
+  mkdir -p ${CAHome}
+fi
+if [ ! -f ${CAKey} ]; then
+  openssl genrsa -out ${CAKey} ${keyBits}
+fi
+if [ ! -f ${CACert} ]; then
+ openssl req -new -x509 -extensions v3_ca -sha256 -days ${CADays} \
+  -key ${CAKey} \
+  -out ${CACert} \
+  -subj "${dnBase}" 
+fi
+
+# 2. tiller server cert
+if [ ! -f ${TillerKey} ]; then
+ openssl genrsa -out ${TillerKey} ${keyBits}
+fi
+if [ ! -f ${TillerCert} ]; then
+ CSR=`mktemp`
+ openssl req -new -sha256 \
+  -key ${TillerKey} \
+  -out ${CSR} \
+  -subj "${dnBase}/CN=${TillerCN}"
+ openssl x509 -req -CAcreateserial -days ${TillerDays} \
+  -CA ${CACert} \
+  -CAkey ${CAKey} \
+  -in ${CSR} \
+  -out ${TillerCert}
+fi
+
+# 3. helm client cert
+if [ ! -f ${HelmKey} ]; then
+ openssl genrsa -out ${HelmKey} ${keyBits}
+fi
+if [ ! -f ${HelmCert} ]; then
+ CSR=`mktemp`
+ openssl req -new -sha256 \
+  -key ${HelmKey} \
+  -out ${CSR} \
+  -subj "${dnBase}/CN=${HelmCN}"
+ openssl x509 -req -CAcreateserial -days ${HelmDays} \
+  -CA ${CACert} \
+  -CAkey ${CAKey} \
+  -in ${CSR} \
+  -out ${HelmCert}
+fi

diff --git a/ric-infra/25-tiller/docker/bin/svcacct-to-kubeconfig.sh b/ric-infra/25-tiller/docker/bin/svcacct-to-kubeconfig.sh
new file mode 100755 (executable)
index 0000000..e294b61
--- /dev/null
+++ b/ric-infra/25-tiller/docker/bin/svcacct-to-kubeconfig.sh
@@ -0,0 +1,45 @@
+#!/bin/sh
+
+#   Copyright (c) 2019 AT&T Intellectual Property.
+#   Copyright (c) 2019 Nokia.
+#
+#   Licensed under the Apache License, Version 2.0 (the "License");
+#   you may not use this file except in compliance with the License.
+#   You may obtain a copy of the License at
+#
+#       http://www.apache.org/licenses/LICENSE-2.0
+#
+#   Unless required by applicable law or agreed to in writing, software
+#   distributed under the License is distributed on an "AS IS" BASIS,
+#   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#   See the License for the specific language governing permissions and
+#   limitations under the License.
+
+# generate a kubconfig (at ${KUBECONFIG} file from the automatically-mounted
+# service account token.
+# ENVIRONMENT:
+# SVCACCT_NAME: the name of the service account user.  default "default"
+# CLUSTER_NAME: the name of the kubernetes cluster.  default "kubernetes"
+# KUBECONFIG: where the generated file will be deposited.
+SVCACCT_TOKEN=`cat /var/run/secrets/kubernetes.io/serviceaccount/token`
+CLUSTER_CA=`base64 /var/run/secrets/kubernetes.io/serviceaccount/ca.crt|tr -d '\n'`
+
+cat >${KUBECONFIG} <<__EOF__
+ApiVersion: v1
+kind: Config
+users:
+- name: ${SVCACCT_NAME:-default}
+  user:
+    token: ${SVCACCT_TOKEN}
+clusters:
+- cluster:
+    certificate-authority-data: ${CLUSTER_CA}
+    server: https://kubernetes.default.svc.cluster.local/
+  name: ${CLUSTER_NAME:-kubernetes}
+contexts:
+- context:
+    cluster: ${CLUSTER_NAME:-kubernetes}
+    user: ${SVCACCT_NAME:-default}
+  name: svcs-acct-context
+current-context: svcs-acct-context
+__EOF__

diff --git a/ric-infra/25-tiller/docker/bin/tls-secrets.sh b/ric-infra/25-tiller/docker/bin/tls-secrets.sh
new file mode 100755 (executable)
index 0000000..b265750
--- /dev/null
+++ b/ric-infra/25-tiller/docker/bin/tls-secrets.sh
@@ -0,0 +1,51 @@
+#!/bin/sh
+
+#   Copyright (c) 2019 AT&T Intellectual Property.
+#   Copyright (c) 2019 Nokia.
+#
+#   Licensed under the Apache License, Version 2.0 (the "License");
+#   you may not use this file except in compliance with the License.
+#   You may obtain a copy of the License at
+#
+#       http://www.apache.org/licenses/LICENSE-2.0
+#
+#   Unless required by applicable law or agreed to in writing, software
+#   distributed under the License is distributed on an "AS IS" BASIS,
+#   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#   See the License for the specific language governing permissions and
+#   limitations under the License.
+
+set -x
+
+export ENTITIES=${ENTITIES:-helm tiller}
+export KUBECONFIG=${KUBECONFIG:-/kubeconfig}
+export CA_DIR=${CA_DIR:-/pki}
+if [ ! -z ${TARGET_NAMESPACE} ]; then
+  SECRET_NS="--namespace ${TARGET_NAMESPACE}"
+else
+  SECRET_NS=''
+fi
+
+if [ ! -f ${KUBECONFIG} ]; then
+  export SVCACCT_NAME=${SVCACCT_NAME:-tiller}
+  /bin/svcacct-to-kubeconfig.sh
+fi    
+
+if [ ! -f ${CA_DIR}/helm.key.pem -o \
+     ! -f ${CA_DIR}/tiller.key.pem ]; then
+ /bin/cert-gen.sh
+fi    
+
+# i'm assuming we can just lose the CA key.
+for entity in ${ENTITIES}; do
+ kubectl create secret generic \
+  --from-file=ca.crt=/pki/ca.cert.pem \
+  --from-file=tls.crt=/pki/${entity}.cert.pem \
+  --from-file=tls.key=/pki/${entity}.key.pem \
+  ${SECRET_NS} ${entity}
+ 
+ kubectl label secret \
+  ${SECRET_NS} ${entity} \
+  app=helm \
+  name=${entity}
+done

diff --git a/ric-infra/25-tiller/docker/container-tag.yaml b/ric-infra/25-tiller/docker/container-tag.yaml
new file mode 100644 (file)
index 0000000..079c0dc
--- /dev/null
+++ b/ric-infra/25-tiller/docker/container-tag.yaml
@@ -0,0 +1,2 @@
+---
+tag: 0.0.1