Adding CentOS 7 Keycloak image.

# CentOS 7 replica of jboss/keycloak (https://hub.docker.com/r/jboss/keycloak/dockerfile)

FROM centos:7.8.2003

ENV KEYCLOAK_VERSION 11.0.0

ENV JDBC_POSTGRES_VERSION 42.2.5

ENV JDBC_MYSQL_VERSION 8.0.19

ENV JDBC_MARIADB_VERSION 2.5.4

ENV JDBC_MSSQL_VERSION 7.4.1.jre11

ENV LAUNCH_JBOSS_IN_BACKGROUND 1

ENV PROXY_ADDRESS_FORWARDING false

ENV JBOSS_HOME /opt/jboss/keycloak

ENV LANG en_US.UTF-8

ARG GIT_REPO

ARG GIT_BRANCH

ARG KEYCLOAK_DIST=https://downloads.jboss.org/keycloak/$KEYCLOAK_VERSION/keycloak-$KEYCLOAK_VERSION.tar.gz

USER root

RUN yum update -y && yum install -y glibc-langpack-en gzip hostname java-11-openjdk-headless openssl tar which git && yum clean all

RUN git clone https://github.com/keycloak/keycloak-containers.git --depth 1 --branch $KEYCLOAK_VERSION /usr/local/keycloak-containers

RUN mkdir -p /opt/jboss

RUN cp -r /usr/local/keycloak-containers/server/tools /opt/jboss/

RUN /opt/jboss/tools/build-keycloak.sh

USER 1000

EXPOSE 8080

EXPOSE 8443

ENTRYPOINT [ "/opt/jboss/tools/docker-entrypoint.sh" ]

CMD ["-b", "0.0.0.0"]

# Building the image

```docker build -t esgf/keycloak .```

# Running a container

```

docker container run -d --name keycloak \

  -p 8080:8080 \

  -e KEYCLOAK_USER=admin \

  -e KEYCLOAK_PASSWORD=secret \

  esgf/keycloak

```