[cloud] Enable DC to return null to core when log dir is not configured and we run into containers with the system property "terracotta.config.logDir.noDefault"

[mathieucarbou]

Examples

• Starting in diagnostic mode will always log to stdout and not to a log file

rm -f -r ~/terracotta/ && ./kit/target/platform-kit-5.9-SNAPSHOT/platform-kit-5.9-SNAPSHOT/server/bin/start-tc-server.sh

outputs:

2022-07-22 10:28:21,644 INFO - Logging directory is not set. Logging only to the console

• Starting an active node with default log dir value

rm -f -r ~/terracotta/ && ./kit/target/platform-kit-5.9-SNAPSHOT/platform-kit-5.9-SNAPSHOT/server/bin/start-tc-server.sh -auto-activate -cluster-name=foo

outputs:

2022-07-22 10:29:41,158 INFO - Created logging directory /Users/matc/terracotta/logs/node-NEGJzh3-S0OoGMWUj8rU0A
2022-07-22 10:29:41,158 INFO - Log file: /Users/matc/terracotta/logs/node-NEGJzh3-S0OoGMWUj8rU0A/terracotta.server.log

• Starting an active node with a custom log dir value

rm -f -r ~/terracotta/ && ./kit/target/platform-kit-5.9-SNAPSHOT/platform-kit-5.9-SNAPSHOT/server/bin/start-tc-server.sh -auto-activate -cluster-name=foo -log-dir=foo

outputs:

2022-07-22 10:30:32,082 INFO - Created logging directory /Users/matc/workspace/terracotta/terracotta-platform/foo/node-nbR3fz6xS1uxpCahCn2f_Q
2022-07-22 10:30:32,082 INFO - Log file: /Users/matc/workspace/terracotta/terracotta-platform/foo/node-nbR3fz6xS1uxpCahCn2f_Q/terracotta.server.log

• Starting an active node on a container with a default log dir value

rm -f -r ~/terracotta/ && JAVA_OPTS=-Dterracotta.config.logDir.noDefault=true ./kit/target/platform-kit-5.9-SNAPSHOT/platform-kit-5.9-SNAPSHOT/server/bin/start-tc-server.sh -auto-activate -cluster-name=foo

outputs:

2022-07-22 10:31:45,515 INFO - Logging directory is not set. Logging only to the console

• Starting an active node on a container with a custom log dir value

rm -f -r ~/terracotta/ && JAVA_OPTS=-Dterracotta.config.logDir.noDefault=true ./kit/target/platform-kit-5.9-SNAPSHOT/platform-kit-5.9-SNAPSHOT/server/bin/start-tc-server.sh -auto-activate -cluster-name=foo -log-dir=foo

outputs:

2022-07-22 10:32:51,463 INFO - Created logging directory /Users/matc/workspace/terracotta/terracotta-platform/foo/node-jyy1ATrCSQGMC-FSZ2QF1w
2022-07-22 10:32:51,463 INFO - Log file: /Users/matc/workspace/terracotta/terracotta-platform/foo/node-jyy1ATrCSQGMC-FSZ2QF1w/terracotta.server.log