Add PostgreSQL DBA roadmap.

content/authors.json

@@ -33,5 +33,10 @@
     "twitter": "BharmalEbrahim",
     "picture": "/authors/ebrahimbharmal007.png",
     "bio": "Love building projects using tools completely new to me. Python forever. Senior at University of Texas at Arlington (2021)"
+  },
+  {
+    "username": "lesovsky",
+    "name": "Alexey Lesovsky",
+    "bio": "Linux system administrator and PostgreSQL DBA at DataEgret."
   }
 ]

content/roadmaps.json

@@ -168,7 +168,7 @@
       "name": "Kamran Ahmed",
       "url": "https://twitter.com/kamranahmedse"
     },
-    "contributorsCount": 0,
+    "contributorsCount": 1,
     "contributorsUrl": "/react/contributors",
     "url": "/react",
     "sidebar": {}
@@ -208,7 +208,7 @@
       "name": "Kamran Ahmed",
       "url": "https://twitter.com/kamranahmedse"
     },
-    "contributorsCount": 0,
+    "contributorsCount": 1,
     "contributorsUrl": "/android/contributors",
     "url": "/android",
     "sidebar": {}
@@ -246,5 +246,31 @@
     "contributorsUrl": "/qa/contributors",
     "url": "/qa",
     "sidebar": {}
+  },
+  {
+    "title": "PostgreSQL DBA Roadmap",
+    "description": "Step by step guide to becoming a modern PostgreSQL DBA",
+    "featuredDescription": "Step by step guide to becoming a modern PostgreSQL DBA in 2020",
+    "path": "/roadmaps/7-postgresql-dba/landscape.md",
+    "resources": "/roadmaps/7-postgresql-dba/resources.md",
+    "author": {
+      "name": "Alexey Lesovsky",
+      "url": "https://github.com/lesovsky"
+    },
+    "featured": false,
+    "detailed": false,
+    "versions": [],
+    "contributorsCount": 0,
+    "contributorsUrl": "/postgresql-dba/contributors",
+    "url": "/postgresql-dba",
+    "sidebar": {
+      "About": [
+        {
+          "url": "/postgresql-dba/summary",
+          "title": "Summary",
+          "path": "/roadmaps/7-postgresql-dba/0-About/0-Summary.md"
+        }
+      ]
+    }
   }
 ]

content/roadmaps/7-postgresql-dba/0-About/0-Summary.md

@@ -0,0 +1,173 @@
+#### PostgreSQL DBA Roadmap
+
+##### Learn basic RDBMS terms and concepts
+Get basic understanding of Postgres key terms and basic RDBMS concepts.
+- Object model: data types, columns, rows, tables, schemas, databases, queries.
+- Relational model: domains, attributes, tuples, relations, constraints, NULL.
+- Databases high-level concepts: ACID, MVCC, transactions, write-ahead log, query processing.
+- Links:
+ - [Postgres Glossary](https://www.postgresql.org/docs/13/glossary.html) 
+ - SQL and Relational Theory - Christopher J. Date, 2009
+ - Database Design and Relational Theory - Christopher J. Date, 2012
+
+##### Learn how to install and run PostgreSQL
+Get practical skills of how to set up and run Postgres to get a working environment for further learning.
+- using package managers (APT, YUM, etc.)
+- using `Docker`.
+- managing Postgres service using `systemd` (start, stop, restart, reload).
+- managing Postgres service using `pg_ctl`, or OS-specific tools (like `pg_ctlcluster`).
+- connect to Postgres using `psql`.
+- deploy database service in cloud environment (AWS, GCE, Azure, Heroku, DigitalOcean, etc...).
+- Links:
+ - [Official download and install instructions](https://www.postgresql.org/download/) 
+ - [Official Docker images](https://hub.docker.com/_/postgres) 
+
+##### Learn SQL concepts
+Get practical skills of how to create and manipulate database objects and how to execute queries using `psql` client.
+- Understanding basic data types.
+- DML queries: querying data, modifying data, filtering data, joining tables.
+ - advanced topics: transactions, CTE, subqueries, lateral join, grouping, set operations.
+- DDL queries: managing tables and schemas (create, alter, drop).
+- Import and export data using `COPY`.
+- Links:
+ - [DB Fiddle](https://www.db-fiddle.com/) 
+ - [PostgreSQL Tutorial](https://www.postgresqltutorial.com/) 
+ - [PostgreSQL SQL Getting Started](https://www.postgresql.org/docs/current/tutorial-sql.html)  
+ - [The SQL Language](https://www.postgresql.org/docs/current/sql.html)
+
+##### Learn how to configure Postgres
+Get understanding of the main aspects of how Postgres could be configured. Deep understanding of Postgres internals is not yet necessary here.
+- postgresql.conf:
+ - resources usage
+ - write-ahead log
+ - checkpoints and background writer
+ - cost-based vacuum and autovacuum
+ - replication
+ - query planner
+ - reporting, logging and statistics
+ - adding extra extensions
+ - ... keep exploring other configuration options
+Links:
+ - [Postgresqlco.nf](http://postgresqlco.nf/) 
+
+##### Learn Postgres security concepts
+Get understanding about basic security concepts and common ways of how to deploy secure configurations.
+- Authentication models, roles, pg_hba.conf, SSL settings.
+- Objects privileges: grant/revoke, default privileges.
+- Advanced topics - row-level security, selinux.
+- Links:
+ - [Client authentication](https://www.postgresql.org/docs/current/client-authentication.html)  
+ - [Roles and users managements](https://www.postgresql.org/docs/current/user-manag.html)
+
+##### Develop infrastructure DBA skills
+Get practical skills of how to deploy, extend, maintain and support Postgres installations and 3rd-party Postgres ecosystem software.
+- Replication: streaming replication, logical replication
+- Backup/recovery tools:
+ - Built-in: `pg_dump`, `pg_dumpall`, `pg_restore`, `pg_basebackup`
+ - 3rd-party: `barman`, `pgbackrest`, `pg_probackup`, `WAL-G`
+ - Backup validation procedures
+- Upgrading procedures
+ - minor and major upgrades using `pg_upgrade`
+ - upgrades using logical replication
+- Connection pooling:
+ - `Pgbouncer`
+ - alternatives: `Pgpool-II`, `Odyssey`, `Pgagroal`
+- Infrastructure monitoring: `Prometheus`, `Zabbix`, other favourite monitoring solution
+- High availability and cluster management tools:
+ - `Patroni`
+ - alternatives: `Repmgr`, `Stolon`, `pg_auto_failover`, `PAF`
+- Applications Load Balancing and Service Discovery: `Haproxy`, `Keepalived`, `Consul`, `Etcd`
+- Deploy Postgres on `Kubernetes`: simple `StatefulSet` setup, `HELM`, operators
+- Resource usage and provisioning, capacity planning
+
+##### Learn how to automate routines
+Get practical skills, learn automation tools and automate existing routine tasks.
+- Automation using shell scripts or any other favourite language (`Bash`, `Python`, `Perl`, etc)
+- Configuration management: `Ansible`, `Salt`, `Chef`, `Puppet`
+
+##### Develop application DBA skills
+Learn theory and get practical skills of how applications should work with Postgres
+- Migrations:
+ - practical patterns and antipatterns
+ - tools: `liquibase`, `sqitch`, language-specific tools
+- Data import/export, bulk loading and processing
+- Queues:
+ - practical patterns and anti-patterns
+ - `Skytools PGQ`
+- Data partitioning and sharding patterns.
+- Database normalization and normal forms.
+- Books:
+ - The Art of PostgreSQL - Dimitri Fontaine, 2020
+
+##### Learn Postgres advanced topics
+Here is important to continuously extend and develop existing knowledge about Postgres.
+- Low level internals:
+ - Processes and memory architecture
+ - Vacuum processing
+ - Buffer management
+ - Lock management
+ - [Physical storage and file layout](https://www.postgresql.org/docs/current/storage.html) 
+ - [System catalog](https://www.postgresql.org/docs/current/catalogs.html) 
+- Fine-grained tuning:
+ - Per-user, per-database settings
+ - [Storage parameters](https://www.postgresql.org/docs/current/sql-createtable.html#SQL-CREATETABLE-STORAGE-PARAMETERS) 
+ - Workload-dependant tuning: OLTP, OLAP, HTAP
+- Advanced SQL topics:
+ - PL/pgSQL, procedures and functions, triggers
+ - aggregate and window functions
+ - recursive CTE
+- Links:
+ - [The Internals of PostgreSQL](http://www.interdb.jp/pg/index.html) for database administrators and system developers
+ - [PL/pgSQL Guide](https://www.postgresql.org/docs/current/plpgsql.html)
+
+##### Learn Postgres troubleshooting technics
+Get basic understanding about troubleshooting tools and get practical skills of how to detect and resolve problems.
+- Operating system tools
+ - `top` (`htop`, `atop`)
+ - `sysstat`
+ - `iotop`
+- Postgres system views
+ - `pg_stat_activity`
+ - `pg_stat_statements`
+- Postgres tools
+ - `pgcenter` - *personal recommendation*
+- Query analyzing:
+ - [EXPLAIN](https://www.postgresql.org/docs/current/sql-explain.html)
+ - [Depesz](https://explain.depesz.com/) online EXPLAIN visualization tool
+ - [PEV](https://tatiyants.com/pev/#/plans) online EXPLAIN visualization tool
+ - [Tensor](https://explain.tensor.ru/) online EXPLAIN visualization tool, RU language only
+- Log analyzing:
+ - `pgBadger`
+ - Ad-hoc analyzing using `grep`, `awk`, `sed`, etc.
+- External tracing/profiling tools: `gdb`, `strace`, `perf-tools`, `ebpf`, core dumps
+- Troubleshooting methods: USE, RED, Golden signals
+- Links:
+ - [Linux Performance](http://www.brendangregg.com/linuxperf.html) by Brendan Gregg
+ - [USE Method](http://www.brendangregg.com/usemethod.html)
+
+##### Learn SQL optimization technics
+Get understanding and practical skills of how to optimize SQL queries.
+- Indexes, and their use cases: B-tree, Hash, GiST, SP-GiST, GIN, BRIN
+- SQL queries patterns and anti-patterns
+- SQL schema design patterns and anti-patterns
+- Links:
+ - [Use the Index, Luke](https://use-the-index-luke.com/) - a Guide to Database Performance for Developers
+- Books:
+ - SQL Antipatterns: Avoiding the Pitfalls of Database Programming - Bill Karwin, 2010 
+
+##### Develop architect skills
+Get deeper understanding of Postgres use cases and where Postgres is suitable and where is not.
+- Postgres forks and extensions: `Greenplum`, `Timescaledb`, `Citus`, `Postgres-XL`, etc.
+- RDBMS in general, benefits and limitations
+- Differences between Postgres and other RDBMS and NoSQL databases
+
+#####  Develop Postgres hacker skills
+Get involved to Postgres community and contribute to Postgres; be a useful member of Postgres, and the open source community; use personal experience to help other people.
+- daily reading and answering in [mailing lists](https://www.postgresql.org/list/)
+  - pgsql-general
+  - pgsql-admin
+  - pgsql-performance
+  - pgsql-hackers
+  - pgsql-bugs
+- reviewing patches
+- writing patches, attending in [Commitfests](https://commitfest.postgresql.org/)

content/roadmaps/7-postgresql-dba/landscape.md

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+## PostgreSQL DBA Roadmap
+Roadmap to becoming a PostgreSQL Database Administrator

content/roadmaps/7-postgresql-dba/meta.json

@@ -0,0 +1,14 @@
+{
+  "title": "PostgreSQL DBA Roadmap",
+  "description": "Step by step guide to becoming a modern PostgreSQL DBA",
+  "featuredDescription": "Step by step guide to becoming a modern PostgreSQL DBA in 2020",
+  "path": "./landscape.md",
+  "resources": "./resources.md",
+  "author": {
+    "name": "Alexey Lesovsky",
+    "url": "https://github.com/lesovsky"
+  },
+  "featured": false,
+  "detailed": false,
+  "versions": []
+}

content/roadmaps/7-postgresql-dba/resources.md

@@ -0,0 +1,7 @@
+> **We are still preparing the resources**. Please check back later or [subscribe to get notified](/signup).
+
+While we prepare the list, follow this simple advice to learn anything
+ 
+> Just **pick a project and start working on it**, you will learn all that you need along the way.
+
+**→**   [All Roadmaps](/roadmaps)  •  [Programming guides](/guides)  •  [Subscribe](/signup)