rm -r deletes matching directories recursively, but not matching filenames. To delete matching files recursively, use:
find . -type f -name ‘pattern’ -delete
Which JavaScript language version features are supported by which version of Node.js?
This site, http://node.green/, has an excellent table showing a matrix of supported JavaScript language features for each Node.js version.
Adding Spring Boot Actuator Metrics to a Jersey App
Spring Boot Actuator adds a number of health monitoring endpoints to support monitoring of your Spring Boot based applications. To add to an existing Spring Boot app, you just add a dependency on spring-boot-starter-actuator as described here.
This works out of the box for a Spring MVC based Spring Boot app, but if you’re building JAX-RS endpoints using Jersey, by default the Jersey resources and Actuator resources both get mapped to the root ( / ), so you need to map either Jersey or Actuator to something other than /. You can easily re-map Actuator be adding this line to application.properties (change /system as needed):
server.servlet-path=/system
This is described here: http://docs.spring.io/spring-boot/docs/current/reference/html/howto-actuator.html#howto-use-actuator-with-jersey
Running a local insecure Docker Registry for testing
To start and run a local Repository for sharing images between machines (from here):
docker run -d -p 5000:5000 --restart=always --name registry registry:2
To tag a local image and push it into your repository:
docker tag imagename [ip of your docker machine]:5000/imagename
And then push it into your repo:
docker push [ip of your docker machine]:5000/imagename
By default, the docker client fails when attempting to push an image to a locally running registry if you haven’t configured TLS and certificates. If you’re running a registry locally for testing, you can configure the local client to trust an insecure Registry by:
- docker-machine ssh [name of docker machine]
-
sudo vi /var/lib/boot2docker/profile - Add this line to the EXTRA_ARGS var:
--insecure-registry=[ip of your docker machine]:5000
This tip from this article.
Update1: if running on Linux (no docker-machine), add the above property to /etc/default/docker and then
sudo service docker restart
Update2: if docker is running as a service using systemd (e.g. the Hypriot Raspberry Pi image), you need to edit
/etc/systemd/system/docker.service
… append the –insecure-registry option to the end of the line that starts: ExecStart (further details here)
Now trying the push again, and success!
$ docker push 192.168.99.100:5000/spring-boot-rest-alpine The push refers to a repository [192.168.99.100:5000/spring-boot-rest-alpine] d5a685774b12: Pushed 726baddb2cde: Pushed bb81ee534db3: Pushed 77f08abee8bf: Pushed latest: digest: sha256:cafa45a64cf25533a1544f37ef7ee3fac614cb2a8d8be30efe9b3c84cebabc52 size: 1159