what is the skywalking agent image address about 7.0.0 - kubernetes

Question

I am now using skywalking as my apm, and now I am configuring the address of my skywalking agent like this:
"initContainers": [
{
"name": "init-agent",
"image": "apache/skywalking-agent:7.0.0",
"command": [
"sh",
"-c",
"set -ex;mkdir -p /skywalking/agent;cp -r /opt/skywalking/agent/* /skywalking/agent;"
],
"resources": {},
"volumeMounts": [
{
"name": "agent",
"mountPath": "/skywalking/agent"
}
],
"terminationMessagePath": "/dev/termination-log",
"terminationMessagePolicy": "File",
"imagePullPolicy": "IfNotPresent"
}
],
but it tells me this address is not correct. Is skywalking agent having docker image? What is the docker image address to use in kubernetes v1.16.0 cluster? I am searching from internet and only find a skywalking base image.

Answer 1

We (Apache SkyWalking Team) have officially provided the Java agent Docker image here https://github.com/apache/skywalking-docker/tree/master/java-agent#use-this-image-as-sidecar-of-kubernetes-service, its usage can be also found there.
As for this specific question, you can always pass environment variable to override the default configuration, for the OAP backend address, its env var is SW_AGENT_COLLECTOR_BACKEND_SERVICES so you can simply pass SW_AGENT_COLLECTOR_BACKEND_SERVICES=your-oap-address:11800 to point the agent to your real OAP address.
apiVersion: v1
kind: Pod
metadata:
name: agent-as-sidecar
spec:
restartPolicy: Never
volumes:
- name: skywalking-agent
emptyDir: { }
containers:
- name: agent-container
image: apache/skywalking-java-agent:8.4.0-alpine
volumeMounts:
- name: skywalking-agent
mountPath: /agent
command: [ "/bin/sh" ]
args: [ "-c", "cp -R /skywalking/agent /agent/" ]
- name: app-container
image: springio/gs-spring-boot-docker
volumeMounts:
- name: skywalking-agent
mountPath: /skywalking
env:
- name: JAVA_TOOL_OPTIONS
value: "-javaagent:/skywalking/agent/skywalking-agent.jar"
- name: SW_AGENT_COLLECTOR_BACKEND_SERVICES
value: "your-oap-address-accessible-inside-docker" # <<=== THIS

Answer 2

Finally I build the side car image by myself:
wget https://www.apache.org/dyn/closer.cgi/skywalking/7.0.0/apache-skywalking-apm-7.0.0.tar.gz && tar -zxvf apache-skywalking-apm-7.0.0.tar.gz
this is the docker file:
FROM busybox:latest
ENV LANG=C.UTF-8
RUN set -eux && mkdir -p /usr/skywalking/agent/
ADD apache-skywalking-apm-bin/agent/ /usr/skywalking/agent/
WORKDIR /