Dockerfile

# Multi-stage build for optimized nginx image
# FROM nginx:alpine
FROM openresty/openresty:alpine

LABEL maintainer="FishcakeLab"
# LABEL description="Fishcake RPC Nginx Load Balancer"
LABEL description="Fishcake RPC OpenResty Load Balancer"

# Install required packages for health checks and SSL
RUN apk add --no-cache \
    wget \
    ca-certificates \
    tzdata
    
RUN apk add --no-cache perl curl && opm get ledgetech/lua-resty-http

# Set timezone
ENV TZ=UTC

# Remove default nginx configuration
# RUN rm -f /etc/nginx/conf.d/default.conf \
#     && rm -f /etc/nginx/nginx.conf

# Create necessary directories
# RUN mkdir -p /var/log/nginx \
#     && mkdir -p /var/cache/nginx \
#     && mkdir -p /etc/nginx/conf.d

# Remove default config
RUN rm -f /etc/openresty/conf.d/default.conf || true

# Ensure /etc/nginx exists and copy mime.types there
RUN mkdir -p /etc/nginx && cp /usr/local/openresty/nginx/conf/mime.types /etc/nginx/mime.types

# Create necessary directories with proper permissions
RUN mkdir -p /var/log/nginx /tmp/client_temp /tmp/proxy_temp /tmp/fastcgi_temp /tmp/uwsgi_temp /tmp/scgi_temp && \
    chown -R nobody:nobody /var/log/nginx /tmp/client_temp /tmp/proxy_temp /tmp/fastcgi_temp /tmp/uwsgi_temp /tmp/scgi_temp

# Copy custom nginx configuration
# Note: nginx.conf will be provided via ConfigMap in Kubernetes
# For local testing, you can uncomment the line below
# COPY nginx.conf /etc/nginx/nginx.conf

# # Set proper permissions
# RUN chown -R nginx:nginx /var/log/nginx \
#     && chown -R nginx:nginx /var/cache/nginx \
#     && chmod -R 755 /var/log/nginx

# Expose HTTP port
# EXPOSE 80
EXPOSE 8080

# Health check configuration
# Checks if nginx is responding on /health endpoint
HEALTHCHECK --interval=30s \
    --timeout=3s \
    --start-period=5s \
    --retries=3 \
    CMD wget --quiet --tries=1 --spider http://localhost:8080/health || exit 1

# # Use non-root user for better security (optional, nginx:alpine already uses nginx user)
# USER nginx

# Start nginx in foreground mode
# CMD ["nginx", "-g", "daemon off;"]
CMD ["openresty", "-c", "/etc/nginx/nginx.conf", "-g", "daemon off;"]