Remote builders improvements in flyctl v0.0.236

I’ve been trying to use --remote-build as I’m on an M1 Mac where Docker just seems to be endless bugs.

Unfortunately I’ve yet to deploy using the --remote-build,flyctl v0.0.245 and the sample Elixir app from the docs. Using the command LOG_LEVEL=debug fly deploy --remote-build I get back the following:

Deploying old-glade-9579
==> Validating app configuration
DEBUG --> POST https://api.fly.io/graphql {{"query":"query($appName: String!, $definition: JSON!) { app(name: $appName) { parseConfig(definition: $definition) { definition valid errors services { description } } } }","variables":{"appName":"old-glade-9579","definition":{"deploy":{"release_command":"/app/bin/hello_elixir eval HelloElixir.Release.migrate"},"env":{},"experimental":{"allowed_public_ports":[],"auto_rollback":true},"kill_signal":"SIGTERM","kill_timeout":5,"processes":[],"services":[{"concurrency":{"hard_limit":25,"soft_limit":20,"type":"connections"},"http_checks":[],"internal_port":4000,"ports":[{"handlers":["http"],"port":80},{"handlers":["tls","http"],"port":443}],"processes":["app"],"protocol":"tcp","script_checks":[],"tcp_checks":[{"grace_period":"30s","interval":"15s","restart_limit":6,"timeout":"2s"}]}]}}}
}
DEBUG <-- 200 https://api.fly.io/graphql (415.22ms) {"data":{"app":{"parseConfig":{"definition":{"kill_timeout":5,"kill_signal":"SIGTERM","processes":[],"deploy":{"release_command":"/app/bin/hello_elixir eval HelloElixir.Release.migrate"},"experimental":{"allowed_public_ports":[],"auto_rollback":true},"services":[{"processes":["app"],"protocol":"tcp","internal_port":4000,"concurrency":{"soft_limit":20,"hard_limit":25,"type":"connections"},"ports":[{"port":80,"handlers":["http"]},{"port":443,"handlers":["tls","http"]}],"tcp_checks":[{"interval":"15s","timeout":"2s","grace_period":"30s","restart_limit":6}],"http_checks":[],"script_checks":[]}],"env":{}},"valid":true,"errors":[],"services":[{"description":"TCP 80/443 ⇢ 4000"}]}}}}
--> Validating app configuration done
Services
TCP 80/443 ⇢ 4000
DEBUG trying remote docker daemon
DEBUG Trying 'Buildpacks' strategy
DEBUG no buildpack builder configured, skipping
DEBUG result image:<nil> error:<nil>
DEBUG Trying 'Dockerfile' strategy
DEBUG --> POST https://api.fly.io/graphql {{"query":"mutation($input: EnsureMachineRemoteBuilderInput!) { ensureMachineRemoteBuilder(input: $input) { machine { id state ips { nodes { family kind ip } } }, app { name organization { slug } } } }","variables":{"input":{"appName":"old-glade-9579","organizationId":null}}}
}
DEBUG <-- 500 https://api.fly.io/graphql (20.94s) {"errors":[{"message":"An unknown error occured.","extensions":{"code":"SERVER_ERROR"}}],"data":{}}
DEBUG result image:<nil> error:error connecting to docker: An unknown error occured.

Error error connecting to docker: An unknown error occured.

The Dockerfile I’m using is slightly different to accommodate Phoenix 1.6 that recently launched, but there’s nothing in there that strikes me as obviously wrong (posted below)

FROM hexpm/elixir:1.12.3-erlang-24.1.2-alpine-3.14.2 AS build

# install build dependencies
RUN apk add --no-cache build-base git curl python3

# prepare build dir
WORKDIR /app

# extend hex timeout
ENV HEX_HTTP_TIMEOUT=20

# install hex + rebar
RUN mix local.hex --force && \
    mix local.rebar --force

# set build ENV as prod
ENV MIX_ENV=prod
ENV SECRET_KEY_BASE=nokey

# Copy over the mix.exs and mix.lock files to load the dependencies. If those
# files don't change, then we don't keep re-fetching and rebuilding the deps.
COPY mix.exs mix.lock ./
COPY config config

RUN mix deps.get --only prod && \
    mix deps.compile

# install npm dependencies
#COPY assets/package.json assets/package-lock.json ./assets/
#RUN npm --prefix ./assets ci --progress=false --no-audit --loglevel=error

COPY priv priv

# NOTE: If using TailwindCSS, it uses a special "purge" step and that requires
# the code in `lib` to see what is being used. Uncomment that here before
# running the npm deploy script if that's the case.
# COPY lib lib

# build assets
#RUN npm run --prefix ./assets deploy
#RUN mix phx.digest
COPY assets assets
RUN mix assets.deploy

# copy source here if not using TailwindCSS
COPY lib lib

# compile and build release
COPY rel rel
RUN mix do compile, release

###
### Second Stage - Setup the Runtime Environment
###

# prepare release docker image
FROM alpine:3.13.3 AS app
RUN apk add --no-cache libstdc++ openssl ncurses-libs

WORKDIR /app

RUN chown nobody:nobody /app

USER nobody:nobody

COPY --from=build --chown=nobody:nobody /app/_build/prod/rel/hello_elixir ./

ENV HOME=/app
ENV MIX_ENV=prod
ENV SECRET_KEY_BASE=nokey
ENV PORT=4000

CMD ["bin/hello_elixir", "start"]

Anecdata: the above app and Dockerfile is running fine without the --remote-only flag from an Ubuntu server.

I know you’ve had problems with the remote-builds and done loads of work to get them working well, so I hate to be the bearer of bad news! Sorry.