restic/docker/Dockerfile
ferringb 87f26accb7
feat: add integrated nice and ionice options for docker (#5448)
The intended usage here is to basically kick restic as a background
"do it, but don't bother my normal load" process.

This allows passing the following environment variables in to
influence scheduling:

- NICE: usual CPU nice.  Defaults to 0.  This requires CAP_SYS_NICE
  to set a negative nice (IE, prioritize).
- IONICE_CLASS: usual ionice class.  Note that setting realtime
  requires CAP_SYS_ADMIN.  Also note the actual ionice default
  is "none".
- IONICE_PRIORITY: set the priority within the given class.  Ignored
  if no class is specified due to class default of "no scheduler".

---------

Signed-off-by: Brian Harring <ferringb@gmail.com>
Co-authored-by: Michael Eischer <michael.eischer@fau.de>
2025-11-16 16:42:33 +01:00

24 lines
648 B
Docker

FROM golang:1.23-alpine AS builder
WORKDIR /go/src/github.com/restic/restic
# Caching dependencies
COPY go.mod go.sum ./
RUN go mod download
COPY . .
RUN go run build.go
FROM alpine:latest AS restic
RUN apk add --no-cache ca-certificates fuse openssh-client tzdata jq
COPY --from=builder /go/src/github.com/restic/restic/restic /usr/bin
COPY ./docker/entrypoint.sh /entrypoint.sh
# IO class default is "none"- 0, however busybox reject ionice `-c0 -n<something>`
# since priority has no meaning for no scheduler.
# Thus the entrypoint script below is necessary
ENV IONICE_CLASS=
ENV IONICE_PRIORITY=4
ENV NICE=0
ENTRYPOINT ["/entrypoint.sh"]