charts/mongodb/templates/replicaset/scripts-configmap.yaml

{{- /*
Copyright Broadcom, Inc. All Rights Reserved.
SPDX-License-Identifier: APACHE-2.0
*/}}

{{- if eq .Values.architecture "replicaset" }}
apiVersion: v1
kind: ConfigMap
metadata:
  name: {{ printf "%s-scripts" (include "mongodb.fullname" .) }}
  namespace: {{ include "mongodb.namespace" . | quote }}
  labels: {{- include "common.labels.standard" ( dict "customLabels" .Values.commonLabels "context" $ ) | nindent 4 }}
    app.kubernetes.io/component: mongodb
  {{- if .Values.commonAnnotations }}
  annotations: {{- include "common.tplvalues.render" ( dict "value" .Values.commonAnnotations "context" $ ) | nindent 4 }}
  {{- end }}
data:
  {{- $fullname := include "mongodb.fullname" . }}
  {{- $releaseNamespace := include "mongodb.namespace" . }}
  {{- if and .Values.externalAccess.autoDiscovery.enabled (eq .Values.externalAccess.service.type "LoadBalancer") }}
  auto-discovery.sh: |-
    #!/bin/bash

    SVC_NAME="${MY_POD_NAME}-external"

    # Auxiliary functions
    retry_while() {
        local -r cmd="${1:?cmd is missing}"
        local -r retries="${2:-12}"
        local -r sleep_time="${3:-5}"
        local return_value=1

        read -r -a command <<< "$cmd"
        for ((i = 1 ; i <= retries ; i+=1 )); do
            "${command[@]}" && return_value=0 && break
            sleep "$sleep_time"
        done
        return $return_value
    }
    k8s_svc_lb_ip() {
        local namespace=${1:?namespace is missing}
        local service=${2:?service is missing}
        local service_ip=$(kubectl get svc "$service" -n "$namespace" -o jsonpath="{.status.loadBalancer.ingress[0].ip}")
        local service_hostname=$(kubectl get svc "$service" -n "$namespace" -o jsonpath="{.status.loadBalancer.ingress[0].hostname}")

        if [[ -n ${service_ip} ]]; then
            echo "${service_ip}"
        else
            echo "${service_hostname}"
        fi
    }
    k8s_svc_lb_ip_ready() {
        local namespace=${1:?namespace is missing}
        local service=${2:?service is missing}
        [[ -n "$(k8s_svc_lb_ip "$namespace" "$service")" ]]
    }
    # Wait until LoadBalancer IP is ready
    retry_while "k8s_svc_lb_ip_ready {{ $releaseNamespace }} $SVC_NAME" || exit 1
    # Obtain LoadBalancer external IP
    k8s_svc_lb_ip "{{ $releaseNamespace }}" "$SVC_NAME" | tee "$SHARED_FILE"
  {{- end }}
  setup.sh: |-
    #!/bin/bash

    . /opt/bitnami/scripts/mongodb-env.sh
    . /opt/bitnami/scripts/libfs.sh
    . /opt/bitnami/scripts/liblog.sh
    . /opt/bitnami/scripts/libvalidations.sh

    {{- if .Values.externalAccess.enabled }}
    {{- if eq .Values.externalAccess.service.type "LoadBalancer" }}
    {{- if .Values.externalAccess.autoDiscovery.enabled }}
    export MONGODB_ADVERTISED_HOSTNAME="$(<${SHARED_FILE})"
    {{- else }}
    ID="${MY_POD_NAME#"{{ $fullname }}-"}"
    export MONGODB_ADVERTISED_HOSTNAME=$(echo '{{ coalesce .Values.externalAccess.service.publicNames .Values.externalAccess.service.loadBalancerIPs }}' | tr -d '[]' | cut -d ' ' -f "$(($ID + 1))")
    {{- end }}
    {{- else if eq .Values.externalAccess.service.type "NodePort" }}
    ID="${MY_POD_NAME#"{{ $fullname }}-"}"
    if is_empty_value "$MONGODB_ADVERTISED_PORT_NUMBER"; then
      export MONGODB_ADVERTISED_PORT_NUMBER=$(echo '{{ .Values.externalAccess.service.nodePorts }}' | tr -d '[]' | cut -d ' ' -f "$(($ID + 1))")
    fi
    {{- if .Values.externalAccess.service.domain }}
    export MONGODB_ADVERTISED_HOSTNAME={{ .Values.externalAccess.service.domain }}
    {{- else }}
    export MONGODB_ADVERTISED_HOSTNAME=$MY_POD_HOST_IP
    {{- end }}
    {{- end }}
    {{- end }}

    {{- if .Values.replicaSetConfigurationSettings.enabled }}
    # placed here before root password env is overwritten
    # makes no assumption about starting state
    # ensures that any stepDown or non-default starting state is handled
    /scripts/replicaSetConfigurationSettings.sh &
    {{- end }}

    if is_empty_value "$MONGODB_ADVERTISED_PORT_NUMBER"; then
      export MONGODB_ADVERTISED_PORT_NUMBER="$MONGODB_PORT_NUMBER"
    fi

    info "Advertised Hostname: $MONGODB_ADVERTISED_HOSTNAME"
    info "Advertised Port: $MONGODB_ADVERTISED_PORT_NUMBER"

    # Check for existing replica set in case there is no data in the PVC
    # This is for cases where the PVC is lost or for MongoDB caches without
    # persistence
    current_primary=""
    if is_dir_empty "${MONGODB_DATA_DIR}/db"; then
      info "Data dir empty, checking if the replica set already exists"
      {{- $replicaCount := int .Values.replicaCount }}
      {{- $portNumber := int .Values.service.ports.mongodb }}
      {{- $fullname := include "mongodb.fullname" . }}
      {{- $releaseNamespace := include "mongodb.namespace" . }}
      {{- $clusterDomain := .Values.clusterDomain }}
      {{- $mongoList := list }}
      {{- range $e, $i := until $replicaCount }}
      {{- $mongoList = append $mongoList (printf "%s-%d.%s-headless.%s.svc.%s:%d" $fullname $i $fullname $releaseNamespace $clusterDomain $portNumber) }}
      {{- end }}

      {{- if .Values.externalAccess.externalMaster.enabled }}
        current_primary={{ printf "%s:%d" (.Values.externalAccess.externalMaster.host) ( int .Values.externalAccess.externalMaster.port) }}
      {{- else }}
        current_primary=$(mongosh admin --host "{{ join "," $mongoList }}" {{- if .Values.auth.enabled }} --authenticationDatabase admin -u $MONGODB_ROOT_USER -p $MONGODB_ROOT_PASSWORD{{- end }}{{- if .Values.tls.enabled}} --tls {{ if .Values.tls.mTLS.enabled }}--tlsCertificateKeyFile=/certs/mongodb.pem {{ end }}--tlsCAFile=/certs/mongodb-ca-cert{{- end }} --eval 'db.runCommand("ismaster")' | awk -F\' '/primary:/ {print $2}')
      {{- end }}
      if ! is_empty_value "$current_primary"; then
        info "Detected existing primary: ${current_primary}"
      fi
    fi

    if ! is_empty_value "$current_primary" && [[ "$MONGODB_ADVERTISED_HOSTNAME:$MONGODB_ADVERTISED_PORT_NUMBER" == "$current_primary" ]]; then
        info "Advertised name matches current primary, configuring node as a primary"
        export MONGODB_REPLICA_SET_MODE="primary"
    elif ! is_empty_value "$current_primary" && [[ "$MONGODB_ADVERTISED_HOSTNAME:$MONGODB_ADVERTISED_PORT_NUMBER" != "$current_primary" ]]; then
        info "Current primary is different from this node. Configuring the node as replica of ${current_primary}"
        export MONGODB_REPLICA_SET_MODE="secondary"
        export MONGODB_INITIAL_PRIMARY_HOST="${current_primary%:*}"
        export MONGODB_INITIAL_PRIMARY_PORT_NUMBER="${current_primary#*:}"
        export MONGODB_SET_SECONDARY_OK="yes"
    elif [[ "$MY_POD_NAME" = "{{ $fullname }}-0" ]]; then
        info "Pod name matches initial primary pod name, configuring node as a primary"
        export MONGODB_REPLICA_SET_MODE="primary"
    else
        info "Pod name doesn't match initial primary pod name, configuring node as a secondary"
        export MONGODB_REPLICA_SET_MODE="secondary"
        export MONGODB_INITIAL_PRIMARY_PORT_NUMBER="$MONGODB_PORT_NUMBER"
    fi

    if [[ "$MONGODB_REPLICA_SET_MODE" == "secondary" ]]; then
        export MONGODB_INITIAL_PRIMARY_ROOT_USER="$MONGODB_ROOT_USER"
        export MONGODB_INITIAL_PRIMARY_ROOT_PASSWORD="$MONGODB_ROOT_PASSWORD"
        export MONGODB_ROOT_PASSWORD=""
        export MONGODB_EXTRA_USERNAMES=""
        export MONGODB_EXTRA_DATABASES=""
        export MONGODB_EXTRA_PASSWORDS=""
        export MONGODB_ROOT_PASSWORD_FILE=""
        export MONGODB_EXTRA_USERNAMES_FILE=""
        export MONGODB_EXTRA_DATABASES_FILE=""
        export MONGODB_EXTRA_PASSWORDS_FILE=""
    fi
    exec /opt/bitnami/scripts/mongodb/entrypoint.sh /opt/bitnami/scripts/mongodb/run.sh
  setup-hidden.sh: |-
    #!/bin/bash

    . /opt/bitnami/scripts/mongodb-env.sh

    {{- if .Values.externalAccess.hidden.enabled }}
    {{- if eq .Values.externalAccess.hidden.service.type "LoadBalancer" }}
    {{- if .Values.externalAccess.autoDiscovery.enabled }}
    export MONGODB_ADVERTISED_HOSTNAME="$(<${SHARED_FILE})"
    {{- else }}
    ID="${MY_POD_NAME#"{{ $fullname }}-hidden-"}"
    export MONGODB_ADVERTISED_HOSTNAME=$(echo '{{ .Values.externalAccess.hidden.service.loadBalancerIPs }}' | tr -d '[]' | cut -d ' ' -f "$(($ID + 1))")
    {{- end }}
    {{- else if eq .Values.externalAccess.hidden.service.type "NodePort" }}
    ID="${MY_POD_NAME#"{{ $fullname }}-hidden-"}"
    if is_empty_value "$MONGODB_ADVERTISED_PORT_NUMBER"; then
      export MONGODB_ADVERTISED_PORT_NUMBER=$(echo '{{ .Values.externalAccess.service.nodePorts }}' | tr -d '[]' | cut -d ' ' -f "$(($ID + 1))")
    fi
    {{- if .Values.externalAccess.hidden.service.domain }}
    export MONGODB_ADVERTISED_HOSTNAME={{ .Values.externalAccess.hidden.service.domain }}
    {{- else }}
    export MONGODB_ADVERTISED_HOSTNAME=$MY_POD_HOST_IP
    {{- end }}
    {{- end }}
    {{- end }}

    {{- if .Values.replicaSetConfigurationSettings.enabled }}
    # placed here before root password env is overwritten
    # makes no assumption about starting state
    # ensures that any stepDown or non-default starting state is handled
    /scripts/replicaSetConfigurationSettings.sh &
    {{- end }}

    echo "Advertised Hostname: $MONGODB_ADVERTISED_HOSTNAME"
    echo "Advertised Port: $MONGODB_ADVERTISED_PORT_NUMBER"
    echo "Configuring node as a hidden node"
    export MONGODB_REPLICA_SET_MODE="hidden"
    export MONGODB_INITIAL_PRIMARY_ROOT_USER="$MONGODB_ROOT_USER"
    export MONGODB_INITIAL_PRIMARY_ROOT_PASSWORD="$MONGODB_ROOT_PASSWORD"
    export MONGODB_INITIAL_PRIMARY_PORT_NUMBER="$MONGODB_PORT_NUMBER"
    export MONGODB_ROOT_PASSWORD=""
    export MONGODB_EXTRA_USERNAMES=""
    export MONGODB_EXTRA_DATABASES=""
    export MONGODB_EXTRA_PASSWORDS=""
    export MONGODB_ROOT_PASSWORD_FILE=""
    export MONGODB_EXTRA_USERNAMES_FILE=""
    export MONGODB_EXTRA_DATABASES_FILE=""
    export MONGODB_EXTRA_PASSWORDS_FILE=""
    exec /opt/bitnami/scripts/mongodb/entrypoint.sh /opt/bitnami/scripts/mongodb/run.sh
  {{- if .Values.replicaSetConfigurationSettings.enabled }}
  replicaSetConfigurationSettings.sh: |-
    #!/bin/bash
    # This script to be called when pod starts.
    # This script sets rs settings which can not be applied via conf file

    function logger ()
    #$1 is the line to be logged
    {
      echo "replicaSetConfigurationSettings.sh -- ${1}" >&1
    }

    SLEEP_PERIOD=10

    {{- if and .Values.auth.enabled (or .Values.auth.rootPassword .Values.auth.existingSecret)}}
    usernameAndPassword="{{- if .Values.tls.enabled}} --tls {{ if .Values.tls.mTLS.enabled }}--tlsCertificateKeyFile=/certs/mongodb.pem {{ end }}--tlsCAFile=/certs/mongodb-ca-cert{{- end }} -u ${MONGODB_ROOT_USER} -p ${MONGODB_ROOT_PASSWORD}"
    {{- else }}
    usernameAndPassword=""
    {{- end }}

    # load Values.replicaSetConfigurationSettings.configuration into associtive array which makes iterating and string manipulation easy
    declare -A desiredRsConf
    {{ range $setting, $value := .Values.replicaSetConfigurationSettings.configuration -}}
    {{ printf "desiredRsConf[%s]='%v'" $setting $value }}
    {{ end }}

    rsConfWriteAttempts=0
    rs_conf_configured_ok=unknown

    while [[ "${rs_conf_configured_ok}" != "true" ]]; do

      # give the rs setup a chance to succeed before attempting to read or configure
      sleep ${SLEEP_PERIOD}

      counter=0
      while ! mongosh ${usernameAndPassword} --eval 'rs.conf()'; do
        counter=$((${counter} +1))
        logger "not yet able to read rs.conf settings from the currently running rs (after ${counter} attempts)"
        sleep ${SLEEP_PERIOD}
      done
      counter=$((${counter} +1))
      logger "rs.conf settings have been read from the currently running rs (after ${counter} attempts)"

      # read rs.conf again and store it. settings format is '"<key>" : <value>,'
      currentRsConf=$(mongosh ${usernameAndPassword} --eval 'rs.conf()')

      desiredEqualsactual=unknown
      settingsToConfigure=""
      for key in ${!desiredRsConf[@]}; do
        value=${desiredRsConf[$key]}
        if ! $(echo "\"${currentRsConf}"\" | grep -q -e "${key}: ${value},"); then
           if [[ $key =~ ^members\[[0-9]+\]\..+ ]]; then
            memberIndex=$(echo $key | grep -o -E '[0-9]+')
            nodeConfigKey=${key#*.}
            settingsToConfigure="${settingsToConfigure}cfg.members[${memberIndex}].${nodeConfigKey} = ${value}; "
          else
            # General rs settings
            settingsToConfigure="${settingsToConfigure}cfg.settings.${key} = ${value}; "
          fi
           desiredEqualsactual=false
        else
          logger "rs conf: ${key} is already at desired value: ${value}"
        fi
      done

      if [[ "${desiredEqualsactual}" != "false" ]]; then
        logger "replicaSetConfigurationSettings match the settings of the currently running rs"
        desiredEqualsactual=true
        rs_conf_configured_ok=true
        logger "Current settings match desired settings (There have been ${rsConfWriteAttempts} attempts to write to mongoDB rs configuration)"
        exit
      fi

      # apply the settings only if this member is currently the mongo replicaset PRIMARY
      # it might take a little time before any pod is PRIMARY
      isMaster=unknown
      if ! mongosh ${usernameAndPassword} --eval 'rs.isMaster()' | grep -q "ismaster: true"; then
        isMaster=false
        logger "This node is not yet PRIMARY - replicaSetConfigurationSettings will only be set on the member that is currently PRIMARY"
      else
        isMaster=true
        logger "This node is PRIMARY"
      fi

      if [[ "${isMaster}" == "true" ]]; then
        logger "This node is currently PRIMARY - will apply rs.conf settings"

        # avoiding tricky string substitution with single quotes by making the eval string a set of vars
        rsconf="cfg = rs.conf();"
        rsreconf="rs.reconfig(cfg);"
        rsCommand="${rsconf} ${settingsToConfigure} ${rsreconf}"

        mongosh ${usernameAndPassword} --eval "${rsCommand}"
        if [ $? -ne 0 ]; then
          logger "Failed to apply mongodb cfg.settings configuration"
        else
          logger "mongodb replicaset cfg.settings configuration applied"
          logger "Will check rs conf"
          # don't exit just yet - the settings will be checked in the next loop
        fi
        rsConfWriteAttempts=$((${rsConfWriteAttempts} + 1 ))
      fi
    done
  {{- end }}
{{- end }}