# Direct Installation

> The direct installation refers to downloading and installing packages directly in your own server(s)

---

Site [llms.txt](/flexter/v2.1/llms.txt)

---

## Requirements

* OS: RedHat or compatible (CentOS, Oracle Linux, Fedora), Debian or compatible (Ubuntu)
* Java: JDK 8/11 (OpenJDK, Oracle, Temurin or other JDK compatible distributions)
* Scala: 2.12
* Memory: 16GB+
* Metadata DB: PostgreSQL 12+
* Spark: 2.1.x to 2.4.x (for local mode it can be installed with the `download.sh` module)
* YARN+HDFS: Hadoop 2.7+
* Hadoop Tools: Hive: 2.1+, Impala
* Ports open: 
  * Flexter metadata - ports to a PostgreSQL instance storing Flexter's metastore. Not required if installed on the same machine as the Flexter processor. Usually 5432 (default).
  * Flexter UI
    * backend (default: 8081)
    * frontend (default: 9091)
  * Spark
    * Master - Web UI and job submissions (defaults: 8080, 7077)
    * Worker - WebUI (defaults: 7071)
    * Application WebUI/driver (default: 4040 and subsequent if multiple)
    * History Server (default: 18080)
  * HDFS (as per existing cluster configuration)
    * master node(s) (default: 8020/9000)
    * worker node(s) (default: 50010)
  * Hive (if used)
    * metastore (as per existing metastore configuration)

---

Section pages:

- [Download/Install](/flexter/v2.1/docs/installation/direct-installation/download/): The Flexter download process.
- [Database Setup](/flexter/v2.1/docs/installation/direct-installation/database/): The flexter database setup based on Official PostgreSQL documentation
- [Post-Installation](/flexter/v2.1/docs/installation/direct-installation/post-installation/): License, metadata database access, metadata schema, Apache Spark, smoke tests and Flexter UI setup.
- [Upgrade](/flexter/v2.1/docs/installation/direct-installation/upgrade/): The Flexter upgrade process.