connection refused when using dockerfile to pull git repository - docker

Question

Local setup for kubernetes: Mac OS
Docker for desktop >> kubernetes >> traefik >> Gitea
The gitea is installed in the cluster and exposed as clusterIP service ingresses through treafik which is accessible at http://gitea.local. Everything is butter smooth till here.
The pain:
Now i am creating a dockerfile and using a docker build to build an image. This dockerfile is trying to clone a repository from http://gitea.local. The problem is i am getting connection refused all the times.
RUN mkdir -p apps sites/assets/css \
&& cd apps \
&& git clone http://gitea.local/inviadmin/testing.git
Then i simply tried RUN curl http://gitea.local from inside dockerfile just to debug and got the same:
curl: (7) Failed to connect to gitea.local port 80: Connection refused
if i curl google.com from dockerfile its working. Any help is strongly appreciated.
Dockerfile:
# syntax = docker/dockerfile:1.0-experimental
FROM bitnami/python:3.7-prod
ENV NVM_DIR=/root/.nvm
ENV NODE_VERSION=12.18.3
ENV PATH="/root/.nvm/versions/node/v${NODE_VERSION}/bin/:${PATH}"
RUN install_packages wget \
&& wget https://raw.githubusercontent.com/nvm-sh/nvm/v0.35.3/install.sh \
&& chmod +x install.sh \
&& ./install.sh \
&& . "$NVM_DIR/nvm.sh" && nvm install ${NODE_VERSION} \
&& nvm use v${NODE_VERSION} && npm install -g yarn
RUN install_packages \
# when using ssh
git openssh-client openssh-server iputils-ping
#git
ARG GIT_BRANCH=master
#RUN ping host.docker.internal
RUN mkdir -p apps sites/assets/css \
&& cd apps \
&& git clone http://gitea.local/inviadmin/test.git --branch $GIT_BRANCH
FROM nginx:latest
COPY --from=0 /home/test/sample/sites /var/www/html/
COPY --from=0 /var/www/error_pages /var/www/
COPY build/nginx/nginx-default.conf.template /etc/nginx/conf.d/default.conf.template
COPY build/entry/docker-entrypoint.sh /
RUN apt-get update && apt-get install -y rsync && apt-get clean \
&& echo "#!/bin/bash" > /rsync \
&& chmod +x /rsync
VOLUME [ "/assets" ]
ENTRYPOINT ["/docker-entrypoint.sh"]
CMD ["nginx", "-g", "daemon off;"]

Answer 1

I tested your dockerfile and here's the outcome
Since the only part you were having issue was the git pull, i chose to use the following lines only.
Notice from the build that how adding entry to the /etc/hosts took effect for the following commands.
If the issue still persists then i suggest you start looking into the gitea container's logs.