I successfully deployed a test docker container based on the instructions from the lab Building an IOx Application with Docker
I then attempted to change the lab, to use ubuntu:18.04 as my base image rather than "alpine:3.5".
I was able to package, install, and activate the application. However, I received an error when trying to start the application:
Error while starting the app: ubuntutest, Cause: Failed to start container: Error: internal error: guest failed to start: /usr/libexec/libvirt_lxc: relocation error: /lib/x86_64-linux-gnu/libnss_dns.so.2: symbol __resolv_context_get, version GLIBC_PRIVATE not defined in file libc.so.6 with link time reference
I would like to know:
- is ubuntu:18.04 a supported base image?
- is alpine linux the only supported base image?
Code...
Dockerfile
FROM ubuntu:18.04
RUN apt -y update && \
apt -y install python3 \
python3-pip && pip3 install bottle
EXPOSE 8000
COPY main.py /main.py
CMD python3 /main.pymain.py
from bottle import route, run
from datetime import datetime
@route('/status/<device_id>')
def status(device_id):
return { "system": 1, "device": str(device_id) }
@route('/time')
def time():
current_time = datetime.now().isoformat(' ')
return {"system": 1, "datetime": current_time}
run(host='0.0.0.0', port=8000)package.yaml
descriptor-schema-version: "2.2"
info:
name: iox_docker_python_ll
description: "IOx Docker Python Web Learning Lab Application"
version: "1.0"
author-link: "http://www.cisco.com"
author-name: "Cisco Systems"
app:
cpuarch: "x86_64"
type: docker
resources:
profile: c1.small
network:
-
interface-name: eth0
ports:
tcp:
- 8000
startup:
rootfs: rootfs.tar
target: ["python3 main.py"]activation.json
{
"resources": {
"profile": "c1.small",
"network": [{
"interface-name": "eth0",
"network-name": "iox-nat0",
"port_map": {
"mode": "auto",
"tcp": {
"8000": "8000"
}
}
}]
}
}
