Failures to start give no indication of problem or sollution

[bib1963]

Tirex has been installed and fails to start properly.

As can be seen below, it is trying to start the mapnik backend with no indication of why it is failing.

The manager, should test if the backend is available and executable and log if it it does not.

Within the backend, it should go through a process of tests to ensure it can run and log why it cannot.

2021-04-29T10:14:33.170232+01:00 ns2 tirex-backend-manager[27191]: tirex-backend-manager started with cmd line options: --config /opt/tirex/etc
2021-04-29T10:14:33.179805+01:00 ns2 tirex-backend-manager[27191]: Config backend_manager_alive_timeout=8
2021-04-29T10:14:33.179888+01:00 ns2 tirex-backend-manager[27191]: Config backend_manager_pidfile=/var/run/tirex/tirex-backend-manager.pid
2021-04-29T10:14:33.179940+01:00 ns2 tirex-backend-manager[27191]: Config backend_manager_syslog_facility=daemon
2021-04-29T10:14:33.179987+01:00 ns2 tirex-backend-manager[27191]: Config bucket=[{maxload=20 maxproc=4 minprio=1 name=live},{maxload=8 maxproc=3 minprio=10 name=important},{maxload=4 maxproc=2 minprio=20 name=background}]
2021-04-29T10:14:33.180031+01:00 ns2 tirex-backend-manager[27191]: Config master_logfile=/var/log/tirex/jobs.log
2021-04-29T10:14:33.180074+01:00 ns2 tirex-backend-manager[27191]: Config master_rendering_timeout=10
2021-04-29T10:14:33.180121+01:00 ns2 tirex-backend-manager[27191]: Config master_syslog_facility=daemon
2021-04-29T10:14:33.180167+01:00 ns2 tirex-backend-manager[27191]: Config metatile_columns=8
2021-04-29T10:14:33.180213+01:00 ns2 tirex-backend-manager[27191]: Config metatile_rows=8
2021-04-29T10:14:33.180260+01:00 ns2 tirex-backend-manager[27191]: Config modtile_socket_name=/var/lib/tirex/modtile.sock
2021-04-29T10:14:33.180304+01:00 ns2 tirex-backend-manager[27191]: Config socket_dir=/var/run/tirex
2021-04-29T10:14:33.180350+01:00 ns2 tirex-backend-manager[27191]: Config stats_dir=/var/lib/tirex/stats
2021-04-29T10:14:33.180394+01:00 ns2 tirex-backend-manager[27192]: Found config for renderers: mapnik
2021-04-29T10:14:33.180545+01:00 ns2 tirex-backend-manager[27192]: opened port 9331 for renderer 'mapnik'
2021-04-29T10:14:33.180652+01:00 ns2 tirex-backend-manager[27192]: renderer mapnik started with pid 27193
2021-04-29T10:14:33.180748+01:00 ns2 tirex-backend-manager[27192]: renderer mapnik started with pid 27194
2021-04-29T10:14:33.180844+01:00 ns2 tirex-backend-manager[27192]: renderer mapnik started with pid 27195
2021-04-29T10:14:33.180936+01:00 ns2 tirex-backend-manager[27192]: child 27193 terminated (exit_code=127, signal=0)
2021-04-29T10:14:33.181036+01:00 ns2 tirex-backend-manager[27192]: child 27194 terminated (exit_code=127, signal=0)
2021-04-29T10:14:34.176121+01:00 ns2 tirex-backend-manager[27192]: renderer mapnik started with pid 27197
2021-04-29T10:14:34.176868+01:00 ns2 tirex-backend-manager[27192]: renderer mapnik started with pid 27198
2021-04-29T10:14:34.177131+01:00 ns2 tirex-backend-manager[27192]: child 27195 terminated (exit_code=127, signal=0)
2021-04-29T10:14:35.178123+01:00 ns2 tirex-backend-manager[27192]: renderer mapnik started with pid 27199
2021-04-29T10:14:35.178612+01:00 ns2 tirex-backend-manager[27192]: child 27197 terminated (exit_code=127, signal=0)
2021-04-29T10:14:35.178767+01:00 ns2 tirex-backend-manager[27192]: child 27198 terminated (exit_code=127, signal=0)
2021-04-29T10:14:36.179341+01:00 ns2 tirex-backend-manager[27192]: renderer mapnik started with pid 27200
2021-04-29T10:14:36.180053+01:00 ns2 tirex-backend-manager[27192]: renderer mapnik started with pid 27201
2021-04-29T10:14:36.180311+01:00 ns2 tirex-backend-manager[27192]: child 27199 terminated (exit_code=127, signal=0)
2021-04-29T10:14:37.181343+01:00 ns2 tirex-backend-manager[27192]: renderer mapnik started with pid 27202
2021-04-29T10:14:37.181852+01:00 ns2 tirex-backend-manager[27192]: child 27200 terminated (exit_code=127, signal=0)
2021-04-29T10:14:37.182094+01:00 ns2 tirex-backend-manager[27192]: child 27201 terminated (exit_code=127, signal=0)
2021-04-29T10:14:38.182570+01:00 ns2 tirex-backend-manager[27192]: renderer mapnik started with pid 27203
2021-04-29T10:14:38.183228+01:00 ns2 tirex-backend-manager[27192]: renderer mapnik started with pid 27204
2021-04-29T10:14:38.183492+01:00 ns2 tirex-backend-manager[27192]: child 27202 terminated (exit_code=127, signal=0)