Setup simples de docker-compose Traefik com Lets Encrypt Cloudflare DNS-01 & TLS-ALPN-01 & HTTP-01 challenges

Este é meu setup usando docker-compose para iniciar Traefik, suportando todos os principais provedores de criptografia. Eu recomendo criar o diretório /opt/traefik e salvar o seguinte arquivo como /opt/traefik/docker-compose.yml. Esta config tem os provedores file e docker habilitados por padrão.

docker-compose.yml

services:
  traefik:
    image: "traefik:v3.2"
    network_mode: "host"
    command:
      - "--api.insecure=true"
      - "--providers.docker=true"
      - "--providers.docker.exposedbydefault=false"
      - "--providers.file.directory=/etc/traefik/conf"
      - "--providers.file.watch=true"
      - "--entrypoints.web.address=:80"
      - "--entryPoints.web.http.redirections.entryPoint.to=websecure"
      - "--entryPoints.web.http.redirections.entryPoint.scheme=https"
      - "--entrypoints.websecure.address=:443"
      - "--entryPoints.websecure.http3"
      - "--entryPoints.websecure.http3.advertisedport=443"
      - "--log.level=info"
      - "--serversTransport.insecureSkipVerify=true"
#
      - "--certificatesresolvers.cloudflare-ec384.acme.dnschallenge=true"
      - "--certificatesresolvers.cloudflare-ec384.acme.dnschallenge.provider=cloudflare"
      - "--certificatesresolvers.cloudflare-ec384.acme.dnschallenge.resolvers=1.1.1.1:53,1.0.0.1:53"
      - "--certificatesresolvers.cloudflare-ec384.acme.caserver=https://acme-v02.api.letsencrypt.org/directory"
      - "--certificatesresolvers.cloudflare-ec384.acme.email=letsencrypt@mydomain.com"
      - "--certificatesresolvers.cloudflare-ec384.acme.KeyType=EC384"
      - "--certificatesresolvers.cloudflare-ec384.acme.storage=/letsencrypt/acme.json"
#
      - "--certificatesresolvers.cloudflare.acme.dnschallenge=true"
      - "--certificatesresolvers.cloudflare.acme.dnschallenge.provider=cloudflare"
      - "--certificatesresolvers.cloudflare.acme.dnschallenge.resolvers=1.1.1.1:53,1.0.0.1:53"
      - "--certificatesresolvers.cloudflare.acme.caserver=https://acme-v02.api.letsencrypt.org/directory"
      - "--certificatesresolvers.cloudflare.acme.email=letsencrypt@mydomain.com"
      - "--certificatesresolvers.cloudflare.acme.KeyType=EC256"
      - "--certificatesresolvers.cloudflare.acme.storage=/letsencrypt/acme.json"
#
      - "--certificatesresolvers.cloudflare-staging.acme.dnschallenge=true"
      - "--certificatesresolvers.cloudflare-staging.acme.dnschallenge.provider=cloudflare"
      - "--certificatesresolvers.cloudflare-staging.acme.dnschallenge.resolvers=1.1.1.1:53,1.0.0.1:53"
      - "--certificatesresolvers.cloudflare-staging.acme.caserver=https://acme-staging-v02.api.letsencrypt.org/directory"
      - "--certificatesresolvers.cloudflare-staging.acme.email=letsencrypt@mydomain.com"
      - "--certificatesresolvers.cloudflare-staging.acme.KeyType=EC256"
      - "--certificatesresolvers.cloudflare-staging.acme.storage=/letsencrypt/acme.json"
#
      - "--certificatesresolvers.alpn-ec384.acme.tlsChallenge=true"
      - "--certificatesresolvers.alpn-ec384.acme.caserver=https://acme-v02.api.letsencrypt.org/directory"
      - "--certificatesresolvers.alpn-ec384.acme.email=letsencrypt@mydomain.com"
      - "--certificatesresolvers.alpn-ec384.acme.KeyType=EC384"
      - "--certificatesresolvers.alpn-ec384.acme.storage=/letsencrypt/acme.json"
#
      - "--certificatesresolvers.alpn.acme.tlsChallenge=true"
      - "--certificatesresolvers.alpn.acme.caserver=https://acme-v02.api.letsencrypt.org/directory"
      - "--certificatesresolvers.alpn.acme.email=letsencrypt@mydomain.com"
      - "--certificatesresolvers.alpn.acme.KeyType=EC256"
      - "--certificatesresolvers.alpn.acme.storage=/letsencrypt/acme.json"
#
      - "--certificatesresolvers.alpn-staging.acme.tlsChallenge=true"
      - "--certificatesresolvers.alpn-staging.acme.caserver=https://acme-staging-v02.api.letsencrypt.org/directory"
      - "--certificatesresolvers.alpn-staging.acme.email=letsencrypt@mydomain.com"
      - "--certificatesresolvers.alpn-staging.acme.KeyType=EC256"
      - "--certificatesresolvers.alpn-staging.acme.storage=/letsencrypt/acme.json"
    environment:
      - CLOUDFLARE_EMAIL=cloudflare@mydomain.com
      - CLOUDFLARE_API_KEY=XYZABC123
    volumes:
      - "./letsencrypt:/letsencrypt"
      - "/var/run/docker.sock:/var/run/docker.sock:ro"
      - "./conf:/etc/traefik/conf:ro"

Substitua letsencrypt@mydomain.com pelo endereço de Email para registrar certificados. Também certifique-se de mudar

cloudflare_env_vars.yml

- CLOUDFLARE_EMAIL=cloudflare@mydomain.com
- CLOUDFLARE_API_KEY=XYZABC123

Opcionalmente, crie um token Pilot e defina-o (não esqueça de descomentar a linha) usando

pilot_token_example.txt

# - "--pilot.token=PILOT_TOKEN_HERE"

Agora vamos fazer o serviço autoiniciar no boot (e iniciá-lo agora mesmo) usando o método detalhado em gerador de .service systemd docker-compose: Rode o seguinte em /opt/traefik

create_docker_compose_service.sh

curl -fsSL https://techoverflow.net/scripts/create-docker-compose-service.sh | sudo bash /dev/stdin

Detalharemos como obter acesso à API do Traefik em posts subsequentes.