126 lines
3.9 KiB
Makefile
126 lines
3.9 KiB
Makefile
DOMAIN_NAME ?= monotremata.xyz
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RECORD_NAME ?= wg
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TTL ?= 300
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WD=/var/lib/dags/ddns
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GET_IP_URL = ifconfig.me/ip
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LINODE_API_URL = https://api.linode.com/v4
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HETZNER_API_URL = https://dns.hetzner.com/api/v1
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STATE_DIR = $(WD)/$(RECORD_NAME).$(DOMAIN_NAME)
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HOST_IP = $(STATE_DIR)/host_ip.txt
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UPDATE_RECORD_LINODE = $(STATE_DIR)/updated_record_linode
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UPDATE_RECORD_HETZNER = $(STATE_DIR)/updated_record_hetzner
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GOPASS=doas -u gopass gopass
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CURL = curl --silent
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LINODE_TOKEN = $(shell cat /srv/secrets/linode_token)
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AUTH_CURL_LINODE = $(CURL) -H "Authorization: Bearer $(LINODE_TOKEN)"
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LINODE_DOMAIN_ID = $(STATE_DIR)/linode_domain_id.txt
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LINODE_RECORD_ID = $(STATE_DIR)/linode_record_id.txt
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HETZNER_TOKEN = $(shell cat /srv/secrets/hetzner_token)
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AUTH_CURL_HETZNER = $(CURL) -H 'Auth-API-Token: $(HETZNER_TOKEN)'
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HETZNER_ZONE_ID = $(STATE_DIR)/hetzner_zone_id.txt
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HETZNER_RECORD_ID = $(STATE_DIR)/hetzner_record_id.txt
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HETZNER_UPDATE_BODY = $(STATE_DIR)/hetzner_update_body.json
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define get_id_linode
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jq --raw-output '.["data"][] | select(.["$(1)"] == "$(2)")["id"]'
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endef
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define get_id_hetzner
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jq --raw-output '.["$(1)"][] | select(.["name"] == "$(2)")["id"]'
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endef
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.PHONY: all force clean
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all: $(UPDATE_RECORD_LINODE) $(UPDATE_RECORD_HETZNER)
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# Linode-specific #############################################################
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# because the ip state is only updated when the IP changes, we should only need
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# to update the record when that happens
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$(UPDATE_RECORD_LINODE): $(HOST_IP) $(LINODE_DOMAIN_ID) $(LINODE_RECORD_ID)
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@echo "updating linode record"
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@$(AUTH_CURL_LINODE) \
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-H "Content-Type: application/json" \
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-X PUT -d '{ "target": "'"$$(cat $<)"'" }' \
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"$(LINODE_API_URL)/domains/$$(cat $(LINODE_DOMAIN_ID))/records/$$(cat $(LINODE_RECORD_ID))"
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@touch $@
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# the domain id should not change and this should only ever need to run once
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$(LINODE_DOMAIN_ID):
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@echo "fetching linode domain id"
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@mkdir -p $(@D)
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@$(AUTH_CURL_LINODE) $(LINODE_API_URL)/domains | \
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$(call get_id_linode,domain,$(DOMAIN_NAME)) | \
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tee $@
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# the register id should not change and this should only ever need to run once
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$(LINODE_RECORD_ID): $(LINODE_DOMAIN_ID)
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@echo "fetching linode record id"
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@mkdir -p $(@D)
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@$(AUTH_CURL_LINODE) $(LINODE_API_URL)/domains/$$(cat $<)/records | \
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$(call get_id_linode,name,$(RECORD_NAME)) | \
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tee $@
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# Hetzner-specific #############################################################
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$(UPDATE_RECORD_HETZNER): $(HETZNER_UPDATE_BODY) $(HETZNER_RECORD_ID)
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@echo "updating hetzner record"
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@mkdir -p $(@D)
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@$(AUTH_CURL_HETZNER) \
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-H 'Content-Type: application/json' \
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"$(HETZNER_API_URL)/records/$$(cat $(HETZNER_RECORD_ID))" \
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-X "PUT" \
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--data @$(HETZNER_UPDATE_BODY)
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@touch $@
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$(HETZNER_UPDATE_BODY): $(HOST_IP) $(HETZNER_ZONE_ID)
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@jq --null-input --raw-output \
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--arg value $$(cat $(HOST_IP)) \
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--arg ttl $(TTL) \
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--arg name $(RECORD_NAME) \
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--arg zone_id $$(cat $(HETZNER_ZONE_ID)) \
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'{ "value": $$value, "ttl": $$ttl | tonumber, "type": "A", "name": $$name, "zone_id": $$zone_id }' > \
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$@
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$(HETZNER_ZONE_ID):
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@echo "fetching hetzner zone id"
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@mkdir -p $(@D)
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@$(AUTH_CURL_HETZNER) \
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$(HETZNER_API_URL)/zones | \
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$(call get_id_hetzner,zones,$(DOMAIN_NAME)) | \
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tee $@
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$(HETZNER_RECORD_ID): $(HETZNER_ZONE_ID)
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@echo "fetching hetzner record id"
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@mkdir -p $(@D)
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@$(AUTH_CURL_HETZNER) \
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$(HETZNER_API_URL)/records?zone_id=$$(cat $<) | \
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$(call get_id_hetzner,records,$(RECORD_NAME)) | \
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tee $@
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# Common #############################################################
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# this target depends on a PHONY so that it is attempted every time, but the
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# target file should only be updated is the current host ip is different to the
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# saved one
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$(HOST_IP): force
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@echo "fetching host IP"
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@mkdir -p $(@D)
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@current_ip=$$($(CURL) $(GET_IP_URL)); \
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echo "$$current_ip"; \
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if [ ! -f $@ ] || [ "$$current_ip" != "$$(cat $@)" ]; then \
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echo "updating stored IP"; \
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echo "$$current_ip" | tee $@; \
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fi
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clean:
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rm -fr $(STATE_DIR)
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