Docker image with some network utilities for investigating and troubleshooting
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Dockerfile linksThis image contains various network utilities and tools. More specifically, it contains the tools incorporated in the Alpine Linux bind-tools and net-tools packages.
Running a container derived from the image will place you in a shell, from where it will be possible to run any of the network utilities included in the packages, e.g.:
$ docker container run --rm -it nbrown/nwutils
/ # nslookup docker.io
Server: google-public-dns-a.google.com
Address: 8.8.8.8#53
Non-authoritative answer:
Name: docker.io
Address: 34.200.194.233
Name: docker.io
Address: 52.87.47.61
Name: docker.io
Address: 52.200.132.201
Alternatively, the default CMD instruction can be overridden on container invocation:
$ docker container run --rm nbrown/nwutils dig docker.io @google-public-dns-a.google.com
; <<>> DiG 9.11.1-P1 <<>> docker.io @google-public-dns-a.google.com
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 35030
;; flags: qr rd ra; QUERY: 1, ANSWER: 3, AUTHORITY: 0, ADDITIONAL: 1
;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 512
;; QUESTION SECTION:
;docker.io. IN A
;; ANSWER SECTION:
docker.io. 59 IN A 34.200.194.233
docker.io. 59 IN A 52.87.47.61
docker.io. 59 IN A 52.200.132.201
;; Query time: 53 msec
;; SERVER: 8.8.8.8#53(8.8.8.8)
;; WHEN: Fri Jul 14 11:54:54 UTC 2017
;; MSG SIZE rcvd: 86
docker pull nbrown/nwutils