trackActivity(id, ip, event, reason) {
    if (this.activity.length > this.activityMaxLength) {
      this.activity.shift();
    }

    this.activity.push({
      address: ip,
      date: new Date().toISOString(),
      event,
      id,
      reason,
    });
  }
Cluster activity tracking

@param {string} id
@param {string} ip
@param {nodeActivityEnum} event
@param {string} [reason]