【原创】大叔经验分享（66）docker启动tomcat不输出catalina.out

docker启动tomcat默认是：

Run the default Tomcat server (CMD ["catalina.sh", "run"]):

查看tomcat启动脚本catalish.sh

elif [ "$1" = "run" ]; then

  shift
  if [ "$1" = "-security" ] ; then
    if [ $have_tty -eq 1 ]; then
      echo "Using Security Manager"
    fi
    shift
    eval exec ""$_RUNJAVA"" ""$LOGGING_CONFIG"" $LOGGING_MANAGER $JAVA_OPTS $CATALINA_OPTS 
      -D$ENDORSED_PROP=""$JAVA_ENDORSED_DIRS"" 
      -classpath ""$CLASSPATH"" 
      -Djava.security.manager 
      -Djava.security.policy==""$CATALINA_BASE/conf/catalina.policy"" 
      -Dcatalina.base=""$CATALINA_BASE"" 
      -Dcatalina.home=""$CATALINA_HOME"" 
      -Djava.io.tmpdir=""$CATALINA_TMPDIR"" 
      org.apache.catalina.startup.Bootstrap "$@" start
  else
    eval exec ""$_RUNJAVA"" ""$LOGGING_CONFIG"" $LOGGING_MANAGER $JAVA_OPTS $CATALINA_OPTS 
      -D$ENDORSED_PROP=""$JAVA_ENDORSED_DIRS"" 
      -classpath ""$CLASSPATH"" 
      -Dcatalina.base=""$CATALINA_BASE"" 
      -Dcatalina.home=""$CATALINA_HOME"" 
      -Djava.io.tmpdir=""$CATALINA_TMPDIR"" 
      org.apache.catalina.startup.Bootstrap "$@" start
  fi

elif [ "$1" = "start" ] ; then

  if [ ! -z "$CATALINA_PID" ]; then
    if [ -f "$CATALINA_PID" ]; then
      if [ -s "$CATALINA_PID" ]; then
        echo "Existing PID file found during start."
        if [ -r "$CATALINA_PID" ]; then
          PID=`cat "$CATALINA_PID"`
          ps -p $PID >/dev/null 2>&1
          if [ $? -eq 0 ] ; then
            echo "Tomcat appears to still be running with PID $PID. Start aborted."
            echo "If the following process is not a Tomcat process, remove the PID file and try again:"
            ps -f -p $PID
            exit 1
          else
            echo "Removing/clearing stale PID file."
            rm -f "$CATALINA_PID" >/dev/null 2>&1
            if [ $? != 0 ]; then
              if [ -w "$CATALINA_PID" ]; then
                cat /dev/null > "$CATALINA_PID"
              else
                echo "Unable to remove or clear stale PID file. Start aborted."
                exit 1
              fi
            fi
          fi
        else
          echo "Unable to read PID file. Start aborted."
          exit 1
        fi
      else
        rm -f "$CATALINA_PID" >/dev/null 2>&1
        if [ $? != 0 ]; then
          if [ ! -w "$CATALINA_PID" ]; then
            echo "Unable to remove or write to empty PID file. Start aborted."
            exit 1
          fi
        fi
      fi
    fi
  fi

  shift
  if [ -z "$CATALINA_OUT_CMD" ] ; then
    touch "$CATALINA_OUT"
    catalina_out_command=">> "$CATALINA_OUT" 2>&1"
  else
    catalina_out_command="| $CATALINA_OUT_CMD"
  fi
  if [ ! -z "$CATALINA_PID" ]; then
    catalina_pid_file="$CATALINA_PID"
  else
    catalina_pid_file=/dev/null
  fi
  if [ "$1" = "-security" ] ; then
    if [ $have_tty -eq 1 ]; then
      echo "Using Security Manager"
    fi
    shift
    eval { $_NOHUP ""$_RUNJAVA"" ""$LOGGING_CONFIG"" $LOGGING_MANAGER $JAVA_OPTS $CATALINA_OPTS 
      -D$ENDORSED_PROP=""$JAVA_ENDORSED_DIRS"" 
      -classpath ""$CLASSPATH"" 
      -Djava.security.manager 
      -Djava.security.policy==""$CATALINA_BASE/conf/catalina.policy"" 
      -Dcatalina.base=""$CATALINA_BASE"" 
      -Dcatalina.home=""$CATALINA_HOME"" 
      -Djava.io.tmpdir=""$CATALINA_TMPDIR"" 
      org.apache.catalina.startup.Bootstrap "$@" start 
      2>&1 & echo $! >"$catalina_pid_file" ; } $catalina_out_command "&"

  else
    eval { $_NOHUP ""$_RUNJAVA"" ""$LOGGING_CONFIG"" $LOGGING_MANAGER $JAVA_OPTS $CATALINA_OPTS 
      -D$ENDORSED_PROP=""$JAVA_ENDORSED_DIRS"" 
      -classpath ""$CLASSPATH"" 
      -Dcatalina.base=""$CATALINA_BASE"" 
      -Dcatalina.home=""$CATALINA_HOME"" 
      -Djava.io.tmpdir=""$CATALINA_TMPDIR"" 
      org.apache.catalina.startup.Bootstrap "$@" start 
      2>&1 & echo $! >"$catalina_pid_file" ; } $catalina_out_command "&"

  fi

  echo "Tomcat started."

elif [ "$1" = "stop" ] ; then

可以发现run时并不会输出catalina.out（exec直接启动java），start时才会输出catalina.out（nohup后台启动java）；

要想输出catalina.out，一种是tee，一种是重定向，后者脚本如下：

# cat start.sh
#!/bin/sh

/usr/local/tomcat/bin/catalina.sh run >> /usr/local/tomcat/logs/catalina.out 2>&1

启动命令改为

$ docker run -d -p 8080:8080 -v /dir/start.sh:/usr/local/tomcat/start.sh tomcat:9 sh /usr/local/tomcat/start.sh

即可

参考：

https://hub.docker.com/_/tomcat