charts/bitnami/mongodb/templates/common-scripts-cm.yaml

apiVersion: v1
kind: ConfigMap
metadata:
  name: {{ printf "%s-common-scripts" (include "mongodb.fullname" .) }}
  namespace: {{ include "mongodb.namespace" . | quote }}
  labels: {{- include "common.labels.standard" . | nindent 4 }}
    app.kubernetes.io/component: mongodb
    {{- if .Values.commonLabels }}
    {{- include "common.tplvalues.render" ( dict "value" .Values.commonLabels "context" $ ) | nindent 4 }}
    {{- end }}
  {{- if .Values.commonAnnotations }}
  annotations: {{- include "common.tplvalues.render" ( dict "value" .Values.commonAnnotations "context" $ ) | nindent 4 }}
  {{- end }}
data:
  {{- $fullname := include "mongodb.fullname" . }}
  startup-probe.sh: |
    #!/bin/bash
    {{- if .Values.tls.enabled }}
    TLS_OPTIONS='--tls --tlsCertificateKeyFile=/certs/mongodb.pem --tlsCAFile=/certs/mongodb-ca-cert'
    {{- end }}
    mongosh  $TLS_OPTIONS --port $MONGODB_PORT_NUMBER --eval 'db.hello().isWritablePrimary || db.hello().secondary' | grep 'true'
  readiness-probe.sh: |
    #!/bin/bash
    {{- if .Values.tls.enabled }}
    TLS_OPTIONS='--tls --tlsCertificateKeyFile=/certs/mongodb.pem --tlsCAFile=/certs/mongodb-ca-cert'
    {{- end }}
    # Run the proper check depending on the version
    [[ $(mongod -version | grep "db version") =~ ([0-9]+\.[0-9]+\.[0-9]+) ]] && VERSION=${BASH_REMATCH[1]}
    . /opt/bitnami/scripts/libversion.sh
    VERSION_MAJOR="$(get_sematic_version "$VERSION" 1)"
    VERSION_MINOR="$(get_sematic_version "$VERSION" 2)"
    VERSION_PATCH="$(get_sematic_version "$VERSION" 3)"
    if [[ ( "$VERSION_MAJOR" -ge 5 ) || ( "$VERSION_MAJOR" -ge 4 && "$VERSION_MINOR" -ge 4 && "$VERSION_PATCH" -ge 2 ) ]]; then
        mongosh $TLS_OPTIONS --port $MONGODB_PORT_NUMBER --eval 'db.hello().isWritablePrimary || db.hello().secondary' | grep 'true'
    else
        mongosh  $TLS_OPTIONS --port $MONGODB_PORT_NUMBER --eval 'db.isMaster().ismaster || db.isMaster().secondary' | grep 'true'
    fi
  ping-mongodb.sh: |
    #!/bin/bash
    {{- if .Values.tls.enabled }}
    TLS_OPTIONS='--tls --tlsCertificateKeyFile=/certs/mongodb.pem --tlsCAFile=/certs/mongodb-ca-cert'
    {{- end }}
    mongosh  $TLS_OPTIONS --port $MONGODB_PORT_NUMBER --eval "db.adminCommand('ping')"
  {{- if .Values.tls.enabled }}
  generate-certs.sh: |
    #!/bin/bash
    {{- if (include "mongodb.autoGenerateCerts" .) }}
    additional_ips=()
    additional_names=()
    while getopts "i:n:s:" flag
    do
        case "${flag}" in
            i) read -a additional_ips <<< ${OPTARG//,/ } ;;
            n) read -a additional_names <<< ${OPTARG//,/ } ;;
            s) svc=${OPTARG// /} ;;
            \?) exit 1 ;;
        esac
    done

    my_hostname=$(hostname)
    cp /certs/CAs/* /certs/
    cat >/certs/openssl.cnf <<EOL
    [req]
    req_extensions = v3_req
    distinguished_name = req_distinguished_name
    [req_distinguished_name]
    [ v3_req ]
    basicConstraints = CA:FALSE
    keyUsage = nonRepudiation, digitalSignature, keyEncipherment
    subjectAltName = @alt_names
    [alt_names]
    DNS.1 = $svc
    DNS.2 = $my_hostname
    {{- if eq .Values.architecture "replicaset" }}
    DNS.3 = $my_hostname.$svc.$MY_POD_NAMESPACE.svc.{{ .Values.clusterDomain }}
    {{- else }}
    DNS.3 = $svc.$MY_POD_NAMESPACE.svc.{{ .Values.clusterDomain }}
    {{- end }}
    DNS.4 = localhost
    IP.0 = ${MY_POD_HOST_IP}
    IP.1 = 127.0.0.1
    EOL
    index=2
    for ip in "${additional_ips[@]}"; do
        cat >>/certs/openssl.cnf <<EOL
    IP.$index = $ip
    EOL
        ((index++))
    done;
    index=5
    for name in "${additional_names[@]}"; do
        cat >>/certs/openssl.cnf <<EOL
    DNS.$index = $(eval echo "${name}")
    EOL
        ((index++))
    done;

    export RANDFILE=/certs/.rnd && openssl genrsa -out /certs/mongo.key 2048
    #Create the client/server cert
    openssl req -new -key /certs/mongo.key -out /certs/mongo.csr -subj "/C=US/O=My Organisations/OU=IT/CN=$my_hostname" -config /certs/openssl.cnf
    #Signing the server cert with the CA cert and key
    openssl x509 -req -in /certs/mongo.csr -CA /certs/mongodb-ca-cert -CAkey /certs/mongodb-ca-key -CAcreateserial -out /certs/mongo.crt -days 3650 -extensions v3_req -extfile /certs/openssl.cnf
    rm /certs/mongo.csr
    #Concatenate to a pem file for use as the client PEM file which can be used for both member and client authentication.
    cat /certs/mongo.crt /certs/mongo.key > /certs/mongodb.pem
    cd /certs/
    shopt -s extglob
    rm -rf !(mongodb-ca-cert|mongodb.pem|CAs|openssl.cnf)
    chmod 0600 mongodb-ca-cert mongodb.pem
    {{- else }}
    {{- if eq .Values.architecture "standalone" }}
      ID="0"
    {{- else }}
    if [[ "$MY_POD_NAME" =~ "arbiter-0"$ ]]; then
      ID="0"
    elif [[ "$MY_POD_NAME" =~ "hidden-"[0-9]{1,}$ ]]; then
      ID="${MY_POD_NAME#"{{ printf "%s-hidden-" $fullname }}"}"
    else
      ID="${MY_POD_NAME#"{{ $fullname }}-"}"
    fi
    {{- end }}

    {{- if .Values.tls.pemChainIncluded }}
    #Split the pem chain by the END CERTIFICATE string and store in files /certs/xx00, /certs/xx01 etc.
    cat /certs-${ID}/tls.crt | csplit - -s -z '/\-*END CERTIFICATE\-*/+1' '{*}' -f /certs/xx

    #Use first certificate as leaf node and combine with key to store in pem file
    cat "/certs/xx00" "/certs-${ID}/tls.key" > "/certs/mongodb.pem"

    #Use remaining intermediate certificates for ca.crt
    echo $(find /certs/ -not -name 'xx00' -name 'xx*') | sort | xargs cat > "/certs/mongodb-ca-cert"

    rm -rf /certs/xx*
    {{- else }}
    cat "/certs-${ID}/tls.crt" "/certs-${ID}/tls.key" > "/certs/mongodb.pem"
    cp "/certs-${ID}/ca.crt" "/certs/mongodb-ca-cert"
    {{- end }}

    chmod 0600 /certs/mongodb-ca-cert /certs/mongodb.pem
    {{- end }}
  {{- end }}