mirror of
https://github.com/nginx-proxy/docker-letsencrypt-nginx-proxy-companion
synced 2024-12-03 17:28:20 +01:00
27d433cb63
* Allow setting NGINX_DOCKER_GEN_CONTAINER from a label * Find labeled cid in runtime instead of startup time
87 lines
3.0 KiB
Bash
Executable File
87 lines
3.0 KiB
Bash
Executable File
#!/bin/bash
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set -u
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export CONTAINER_ID=$(cat /proc/self/cgroup | sed -nE 's/^.+docker[\/-]([a-f0-9]{64}).*/\1/p' | head -n 1)
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if [[ -z "$CONTAINER_ID" ]]; then
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echo "Error: can't get my container ID !" >&2
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exit 1
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fi
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function check_docker_socket {
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if [[ $DOCKER_HOST == unix://* ]]; then
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socket_file=${DOCKER_HOST#unix://}
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if [[ ! -S $socket_file ]]; then
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cat >&2 <<-EOT
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ERROR: you need to share your Docker host socket with a volume at $socket_file
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Typically you should run your container with: \`-v /var/run/docker.sock:$socket_file:ro\`
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See the documentation at http://git.io/vZaGJ
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EOT
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exit 1
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fi
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fi
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}
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function get_nginx_proxy_cid {
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# Look for a NGINX_VERSION environment variable in containers that we have mount volumes from.
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local volumes_from=$(docker_api "/containers/$CONTAINER_ID/json" | jq -r '.HostConfig.VolumesFrom[]' 2>/dev/null)
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for cid in $volumes_from; do
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cid=${cid%:*} # Remove leading :ro or :rw set by remote docker-compose (thx anoopr)
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if [[ $(docker_api "/containers/$cid/json" | jq -r '.Config.Env[]' | egrep -c '^NGINX_VERSION=') = "1" ]];then
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export NGINX_PROXY_CONTAINER=$cid
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break
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fi
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done
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if [[ -z "$(nginx_proxy_container)" ]]; then
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echo "Error: can't get nginx-proxy container id !" >&2
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echo "Check that you use the --volumes-from option to mount volumes from the nginx-proxy or label the nginx proxy container to use with 'com.github.jrcs.letsencrypt_nginx_proxy_companion.nginx_proxy=true'." >&2
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exit 1
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fi
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}
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function check_writable_directory {
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local dir="$1"
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docker_api "/containers/$CONTAINER_ID/json" | jq ".Mounts[].Destination" | grep -q "^\"$dir\"$"
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if [[ $? -ne 0 ]]; then
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echo "Warning: '$dir' does not appear to be a mounted volume."
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fi
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if [[ ! -d "$dir" ]]; then
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echo "Error: can't access to '$dir' directory !" >&2
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echo "Check that '$dir' directory is declared has a writable volume." >&2
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exit 1
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fi
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touch $dir/.check_writable 2>/dev/null
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if [[ $? -ne 0 ]]; then
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echo "Error: can't write to the '$dir' directory !" >&2
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echo "Check that '$dir' directory is export as a writable volume." >&2
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exit 1
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fi
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rm -f $dir/.check_writable
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}
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function check_dh_group {
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if [[ ! -f /etc/nginx/certs/dhparam.pem ]]; then
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echo "Creating Diffie-Hellman group (can take several minutes...)"
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openssl dhparam -out /etc/nginx/certs/.dhparam.pem.tmp 2048
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mv /etc/nginx/certs/.dhparam.pem.tmp /etc/nginx/certs/dhparam.pem || exit 1
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fi
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}
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source /app/functions.sh
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[[ $DEBUG == true ]] && set -x
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if [[ "$*" == "/bin/bash /app/start.sh" ]]; then
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check_docker_socket
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if [[ -z "$(docker_gen_container)" ]]; then
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[[ -z "${NGINX_PROXY_CONTAINER:-}" ]] && get_nginx_proxy_cid
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fi
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check_writable_directory '/etc/nginx/certs'
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check_writable_directory '/etc/nginx/vhost.d'
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check_writable_directory '/usr/share/nginx/html'
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check_dh_group
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fi
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exec "$@"
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