{"id":16393,"date":"2021-06-03T15:05:50","date_gmt":"2021-06-03T13:05:50","guid":{"rendered":"https:\/\/www.dbi-services.com\/blog\/patroni-on-freebsd-13\/"},"modified":"2021-06-03T15:05:50","modified_gmt":"2021-06-03T13:05:50","slug":"patroni-on-freebsd-13","status":"publish","type":"post","link":"https:\/\/www.dbi-services.com\/blog\/patroni-on-freebsd-13\/","title":{"rendered":"Patroni on FreeBSD 13?"},"content":{"rendered":"

You can already find several blog posts around PostgreSQL protected by Patroni on our blog<\/a>. They all have in common, that the setup is on a flavor of Linux. As I got impressed by FreeBSD<\/a> and played with it during the last weeks (some blog posts here<\/a>), I wanted to know if Patroni runs well on FreeBSD. Well, here are the results …<\/p>\n

<\/p>\n

As usual you need at least three nodes for automatic fail-over to work, in my case these are:<\/p>\n

\npostgres@freebsd-patroni1:\/home\/postgres\/ [pg133] grep patroni \/etc\/hosts\n192.168.22.71          patroni1-freebsd  patroni1-freebsd.it.dbi-services.com\n192.168.22.72          patroni2-freebsd  patroni2-freebsd.it.dbi-services.com\n192.168.22.73          patroni3-freebsd  patroni3-freebsd.it.dbi-services.com\n<\/pre>\n
On all of these nodes PostgreSQL 13.3 is already installed in the same location:<\/p>\n
\npostgres@freebsd-patroni2:\/home\/postgres\/ [pg133] ls \/u01\/app\/postgres\/product\/13\/db_3\/\nbin     include lib     share\n<\/pre>\n
Except for this sudo configuration:<\/p>\n
\npostgres@freebsd-patroni1:\/home\/postgres\/ [pg133] sudo grep postgres \/usr\/local\/etc\/sudoers \npostgres ALL=(ALL) NOPASSWD: ALL\n<\/pre>\n
… nothing happened on these systems. <\/p>\n
The first bit we usually install and configure is etcd<\/a> but there are no pre-build binaries to download from the GitHub page<\/a>. So either we need to compile it from source, or we use the packages provided by FreeBSD:<\/p>\n
\npostgres@freebsd-patroni1:\/home\/postgres\/ [pg133] sudo pkg search etcd\ncoreos-etcd-2.3.8_4            Highly-available key value store and service discovery\ncoreos-etcd31-3.1.20_2         Highly-available key value store and service discovery\ncoreos-etcd32-3.2.32           Highly-available key value store and service discovery\ncoreos-etcd33-3.3.23           Highly-available key value store and service discovery\ncoreos-etcd34-3.4.14           Highly-available key value store and service discovery\netcd-1.0.1_3                   Enhanced Tiny CD, a simple ncurses-based CD player\nnetcdf-4.7.4                   C library for machine-independent, array-oriented data access\nnetcdf-cxx-4.3.1_1             C++ library for machine-independent, array-oriented data access\nnetcdf-fortran-4.5.3           Fortran library for machine-independent, array-oriented data access\noctave-forge-netcdf-1.0.14_2   Octave-forge package netcdf\np5-NetCDF-1.2.4_7              Perl5 module to read and write netCDF files\npnetcdf-1.8.1_10               Library providing high-performance I\/O\npy37-netCDF4-1.3.1_8           Python Interface to the NetCDF Library (versions 3 and 4)\npy37-netcdf-flattener-1.2.0    Flatten NetCDF files while preserving references\nrubygem-ruby-netcdf-0.7.2_3    Ruby interface to the NetCDF scientific IO library\nsetcdboot-1.0                  Mark a file bootable within a DEC Alpha ISO-966\n<\/pre>\n
Let’s use the latest release and install the FreeBSD package (on all nodes):<\/p>\n
\npostgres@freebsd-patroni1:\/home\/postgres\/ [pg133] sudo pkg install coreos-etcd34-3.4.14\nUpdating FreeBSD repository catalogue...\nFreeBSD repository is up to date.\nAll repositories are up to date.\nThe following 1 package(s) will be affected (of 0 checked):\n\nNew packages to be INSTALLED:\n        coreos-etcd34: 3.4.14\n\nNumber of packages to be installed: 1\n\nThe process will require 35 MiB more space.\n9 MiB to be downloaded.\n\nProceed with this action? [y\/N]: y\n[1\/1] Fetching coreos-etcd34-3.4.14.txz: 100%    9 MiB   2.3MB\/s    00:04    \nChecking integrity... done (0 conflicting)\n[1\/1] Installing coreos-etcd34-3.4.14...\n[1\/1] Extracting coreos-etcd34-3.4.14: 100%\n<\/pre>\n
Once etcd is installed it needs a configuration file on each host, here they are:<\/p>\n
\npostgres@freebsd-patroni1:\/home\/postgres\/ [pg133] cat \/usr\/local\/etc\/etcd.conf \nname: patroni1\ndata-dir: \/u02\/pgdata\/etcd\ninitial-advertise-peer-urls: http:\/\/192.168.22.71:2380\nlisten-peer-urls: http:\/\/192.168.22.71:2380\nlisten-client-urls: http:\/\/192.168.22.71:2379,http:\/\/localhost:2379\nadvertise-client-urls: http:\/\/192.168.22.71:2379\ninitial-cluster: patroni1=http:\/\/192.168.22.71:2380,patroni2=http:\/\/192.168.22.72:2380,patroni3=http:\/\/192.168.22.73:2380\nenable-v2: true\n\npostgres@freebsd-patroni1:\/home\/postgres\/ [pg133] ssh patroni2-freebsd cat \/usr\/local\/etc\/etcd.conf\nname: patroni2\ndata-dir: \/u02\/pgdata\/etcd\ninitial-advertise-peer-urls: http:\/\/192.168.22.72:2380\nlisten-peer-urls: http:\/\/192.168.22.72:2380\nlisten-client-urls: http:\/\/192.168.22.72:2379,http:\/\/localhost:2379\nadvertise-client-urls: http:\/\/192.168.22.72:2379\ninitial-cluster: patroni1=http:\/\/192.168.22.71:2380,patroni2=http:\/\/192.168.22.72:2380,patroni3=http:\/\/192.168.22.73:2380\nenable-v2: true\n\npostgres@freebsd-patroni1:\/home\/postgres\/ [pg133] ssh patroni3-freebsd cat \/usr\/local\/etc\/etcd.conf\nname: patroni3\ndata-dir: \/u02\/pgdata\/etcd\ninitial-advertise-peer-urls: http:\/\/192.168.22.73:2380\nlisten-peer-urls: http:\/\/192.168.22.73:2380\nlisten-client-urls: http:\/\/192.168.22.73:2379,http:\/\/localhost:2379\nadvertise-client-urls: http:\/\/192.168.22.73:2379\ninitial-cluster: patroni1=http:\/\/192.168.22.71:2380,patroni2=http:\/\/192.168.22.72:2380,patroni3=http:\/\/192.168.22.73:2380\nenable-v2: true\n<\/pre>\n
Testing the configuration can easily be done by starting etcd on all nodes:<\/p>\n
\npostgres@freebsd-patroni2:\/home\/postgres\/ [pg133] etcd --config-file \/usr\/local\/etc\/etcd.conf \n<\/pre>\n
Once up and running on all three nodes, verify that all is fine with etcd:<\/p>\n
\npostgres@freebsd-patroni1:\/home\/postgres\/ [pg133] etcdctl endpoint status --endpoints=192.168.22.71:2379,192.168.22.72:2379,192.168.22.73:2379 -w table\n+--------------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+\n|      ENDPOINT      |        ID        | VERSION | DB SIZE | IS LEADER | IS LEARNER | RAFT TERM | RAFT INDEX | RAFT APPLIED INDEX | ERRORS |\n+--------------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+\n| 192.168.22.71:2379 | 52009b42a701a943 |  3.4.14 |   25 kB |      true |      false |        13 |         10 |                 10 |        |\n| 192.168.22.72:2379 | 26d9ce490122dc7a |  3.4.14 |   25 kB |     false |      false |        13 |         10 |                 10 |        |\n| 192.168.22.73:2379 | 6141508d7bd79cb5 |  3.4.14 |   25 kB |     false |      false |        13 |         10 |                 10 |        |\n+--------------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+\n<\/pre>\n
The next step is to configure automatic start of etcd when the nodes comes up. This is a bit different in FreeBSD than what you know from Linux. A detailed guide on how to do that can be found here<\/a>. We’ll be using this simple script (you should of course extend that script to provide a stop command, add logging to a logfile …):<\/p>\n
\npostgres@freebsd-patroni1:\/home\/postgres\/ [pg133] cat \/etc\/rc.d\/etcd \n#!\/usr\/local\/bin\/bash\n\n# PROVIDE: ETCD\n# REQUIRE: DAEMON FILESYSTEMS NETWORKING\n# BEFORE:  LOGIN \n# KEYWORD: shutdown\n\n. \/etc\/rc.subr\n\nname=\"etcd\"\nrcvar=etcd_enable\nstart_cmd=\"su - postgres -c '\/usr\/sbin\/daemon -c -f \/usr\/local\/bin\/etcd --config-file \/usr\/local\/etc\/etcd.conf'\"\n\nload_rc_config $name\nrun_rc_command \"$1\"\n<\/pre>\n
To test if it basically works use the “onestart” argument:<\/p>\n
\nostgres@freebsd-patroni1:\/home\/postgres\/ [pg133] sudo \/etc\/rc.d\/etcd onestart\n[WARNING] Deprecated '--logger=capnslog' flag is set; use '--logger=zap' flag instead\n2021-06-03 17:31:49.344284 I | etcdmain: Loading server configuration from \"\/usr\/local\/etc\/etcd.conf\". Other configuration command line flags and environment variables will be ignored if provided.\n2021-06-03 17:31:49.344428 I | etcdmain: etcd Version: 3.4.14\n2021-06-03 17:31:49.344461 I | etcdmain: Git SHA: Not provided (use .\/build instead of go build)\n...\n<\/pre>\n
Looks good, let’s add it to rc.conf so etcd will startup automatically:<\/p>\n
\npostgres@freebsd-patroni1:\/home\/postgres\/ [pg133] grep etcd \/etc\/rc.conf\netcd_enable=\"YES\"\n<\/pre>\n
Once you’ve done that on all nodes, reboot and check that all is fine:<\/p>\n
\npostgres@freebsd-patroni1:\/home\/postgres\/ [pg133] sudo init 6\npostgres@freebsd-patroni1:\/home\/postgres\/ [pg133] ssh patroni2-freebsd init 6\npostgres@freebsd-patroni1:\/home\/postgres\/ [pg133] ssh patroni3-freebsd init 6\n# wait for reboot\npostgres@freebsd-patroni1:\/home\/postgres\/ [pg133] etcdctl endpoint status --endpoints=192.168.22.71:2379,192.168.22.72:2379,192.168.22.73:2379 -w table\n+--------------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+\n|      ENDPOINT      |        ID        | VERSION | DB SIZE | IS LEADER | IS LEARNER | RAFT TERM | RAFT INDEX | RAFT APPLIED INDEX | ERRORS |\n+--------------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+\n| 192.168.22.71:2379 | 52009b42a701a943 |  3.4.14 |   33 kB |     false |      false |       146 |         16 |                 16 |        |\n| 192.168.22.72:2379 | 26d9ce490122dc7a |  3.4.14 |   33 kB |      true |      false |       146 |         16 |                 16 |        |\n| 192.168.22.73:2379 | 6141508d7bd79cb5 |  3.4.14 |   25 kB |     false |      false |       146 |         16 |                 16 |        |\n+--------------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+\n<\/pre>\n
So far, so good for etcd. The next step is to install Patroni, and this is not different from an installation on Linux (no surprise here, it is based on Python):<\/p>\n
\npostgres@freebsd-patroni1:\/home\/postgres\/ [pg133] sudo pkg install py37-pip\npostgres@freebsd-patroni1:\/home\/postgres\/ [pg133] sudo pip install --upgrade setuptools\npostgres@freebsd-patroni1:\/home\/postgres\/ [pg133] pip install --user psycopg2-binary\npostgres@freebsd-patroni1:\/home\/postgres\/ [pg133] pip install --user python-etcd\npostgres@freebsd-patroni1:\/home\/postgres\/ [pg133] pip install --user wheel\npostgres@freebsd-patroni1:\/home\/postgres\/ [pg133] pip install --user patroni[etcd]\n<\/pre>\n
The configuration of Patroni is of course not different than on Linux, here is an example for the first host:<\/p>\n
\npostgres@freebsd-patroni1:\/home\/postgres\/ [pg133] cat \/usr\/local\/etc\/patroni.yml \nscope: postgres_patroni\nname: pg-patroni1\n\nrestapi:\n  listen: 192.168.22.71:8008\n  connect_address: 192.168.22.71:8008\n\netcd:\n    hosts: 192.168.22.71:2379,192.168.22.72:2379,192.168.22.73:2379\n\nlog:\n  dir: \/u02\/log\/patroni\/\n  file_num: 14\n  file_size: 10000000\n  \nbootstrap:\n  dcs:\n    ttl: 30\n    loop_wait: 10\n    retry_timeout : 10\n    maximum_lag_on_failover: 1048576\n    postgresql:\n      use_pg_rewind: true\n      use_slots: true\n      parameters:\n        wal_keep_segments: 100\n\n  initdb:\n  - encoding: UTF8\n  - data-checksums\n\n  pg_hba:\n  - host replication all 0.0.0.0\/0 md5\n  - host all all 0.0.0.0\/0 md5\n  - hostssl all all 0.0.0.0\/0 md5\npostgresql:\n  listen: \"*:5432\"\n  connect_address: 192.168.22.71:5432\n  data_dir: \/u02\/pgdata\/13\/PG1\n  bin_dir: \/u01\/app\/postgres\/product\/13\/db_3\/bin\n  authentication:\n    replication:\n      username: postgres\n      password: postgres\n    superuser:\n      username: postgres\n      password: postgres\n  parameters:\n    logging_collector: 'on'\n    log_truncate_on_rotation: 'on'\n    log_filename: 'postgresql-%a.log'\n    log_rotation_age: '1440'\n    log_line_prefix: '%m - %l - %p - %h - %u@%d - %x'\n    log_directory: '\/u02\/pgdata\/13\/PG1\/pg_log'\n    log_min_messages: 'WARNING'\n    log_autovacuum_min_duration: '60s'\n    log_min_error_statement: 'NOTICE'\n    log_min_duration_statement: '30s'\n    log_checkpoints: 'on'\n    log_statement: 'ddl'\n    log_lock_waits: 'on'\n    log_temp_files: '0'\n    log_timezone: 'Europe\/Zurich'\n    log_connections: off\n    log_disconnections: off\n    log_duration: off\n    checkpoint_completion_target: 0.9\n    checkpoint_timeout: '20min'\n    client_min_messages: 'WARNING'\n    wal_level: 'replica'\n    hot_standby_feedback: 'on'\n    max_wal_senders: '10'\n    max_replication_slots: '10'\n    shared_preload_libraries: 'pg_stat_statements'\n    autovacuum_vacuum_threshold: 50\n    archive_mode: 'on'\n    archive_command: '\/bin\/true'\n    cluster_name: 'PG1' \n<\/pre>\n
If all is fine, you should be able to bootstrap the first node:<\/p>\n
\npostgres@freebsd-patroni1:\/home\/postgres\/ [pg133] .local\/bin\/patroni \/usr\/local\/etc\/patroni.yml \nThe files belonging to this database system will be owned by user \"postgres\".\nThis user must also own the server process.\n\nThe database cluster will be initialized with locale \"C.UTF-8\".\nThe default text search configuration will be set to \"english\".\n\nData page checksums are enabled.\n\ncreating directory \/u02\/pgdata\/13\/PG1 ... ok\ncreating subdirectories ... ok\nselecting dynamic shared memory implementation ... posix\nselecting default max_connections ... 100\nselecting default shared_buffers ... 128MB\nselecting default time zone ... Europe\/Vaduz\ncreating configuration files ... ok\nrunning bootstrap script ... ok\nperforming post-bootstrap initialization ... ok\nsyncing data to disk ... ok\n\ninitdb: warning: enabling \"trust\" authentication for local connections\nYou can change this by editing pg_hba.conf or using the option -A, or\n--auth-local and --auth-host, the next time you run initdb.\n\nSuccess. You can now start the database server using:\n\n    \/u01\/app\/postgres\/product\/13\/db_3\/bin\/pg_ctl -D \/u02\/pgdata\/13\/PG1 -l logfile start\n\nlocalhost:5432 - no response\n2021-06-03 18:39:24.699 CEST - 1 - 1495 -  - @ - 0LOG:  redirecting log output to logging collector process\n2021-06-03 18:39:24.699 CEST - 2 - 1495 -  - @ - 0HINT:  Future log output will appear in directory \"\/u02\/pgdata\/13\/PG1\/pg_log\".\nlocalhost:5432 - accepting connections\nlocalhost:5432 - accepting connections\n<\/pre>\n
Do exactly the same on the remaining to nodes and then create the rc script for Patroni (note the dependency on etcd):<\/p>\n
\npostgres@freebsd-patroni1:\/home\/postgres\/ [pg133] sudo cat \/etc\/rc.d\/patroni\n#!\/usr\/local\/bin\/bash\n\n# PROVIDE: PATRONI\n# REQUIRE: ETCD\n# BEFORE:  LOGIN \n# KEYWORD: shutdown\n\n. \/etc\/rc.subr\n\nname=\"patroni\"\nrcvar=patroni_enable\nstart_cmd=\"su - postgres -c '\/usr\/sbin\/daemon -c -f \/home\/postgres\/.local\/bin\/patroni \/usr\/local\/etc\/patroni.yml'\"\n\nload_rc_config $name\nrun_rc_command \"$1\"\n<\/pre>\n
Enable autostart in rc.conf:<\/p>\n
\npostgres@freebsd-patroni1:\/home\/postgres\/ [pg133] grep patroni \/etc\/rc.conf\nhostname=\"freebsd-patroni1.it.dbi-services.com\"\npatroni_enable=\"YES\"\n<\/pre>\n
… and reboot all nodes. The result should be this:<\/p>\n
\npostgres@freebsd-patroni1:\/home\/postgres\/ [pg133] .local\/bin\/patronictl -c \/usr\/local\/etc\/patroni.yml list \n+ Cluster: postgres_patroni (6969608203440481745) +----+-----------+\n| Member      | Host          | Role    | State   | TL | Lag in MB |\n+-------------+---------------+---------+---------+----+-----------+\n| pg-patroni1 | 192.168.22.71 | Leader  | running |  5 |           |\n| pg-patroni2 | 192.168.22.72 | Replica | running |  5 |         0 |\n| pg-patroni3 | 192.168.22.73 | Replica | running |  5 |         0 |\n+-------------+---------------+---------+---------+----+-----------+\n<\/pre>\n
Works as expected.<\/p>\n","protected":false},"excerpt":{"rendered":"
You can already find several blog posts around PostgreSQL protected by Patroni on our blog. They all have in common, that the setup is on a flavor of Linux. As I got impressed by FreeBSD and played with it during the last weeks (some blog posts here), I wanted to know if Patroni runs well […]<\/p>\n","protected":false},"author":28,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[229],"tags":[1543,77],"type_dbi":[],"class_list":["post-16393","post","type-post","status-publish","format-standard","hentry","category-database-administration-monitoring","tag-patroni","tag-postgresql"],"acf":[],"yoast_head":"\nPatroni on FreeBSD 13? - dbi Blog<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.dbi-services.com\/blog\/patroni-on-freebsd-13\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Patroni on FreeBSD 13?\" \/>\n<meta property=\"og:description\" content=\"You can already find several blog posts around PostgreSQL protected by Patroni on our blog. 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