implement act_runner rootless image (#208)

This PR creates a rootless Docker image that runs both `dockerd` and `act_runner` using `supervisord`.  It has been tested locally for a few days and seems stable.

Co-authored-by: ccureau <ccureau@noreply.gitea.io>
Reviewed-on: https://gitea.com/gitea/act_runner/pulls/208
Reviewed-by: Jason Song <i@wolfogre.com>
Co-authored-by: ccureau <ccureau@noreply.gitea.com>
Co-committed-by: ccureau <ccureau@noreply.gitea.com>
This commit is contained in:
ccureau 2023-06-12 06:35:27 +00:00 committed by Jason Song
parent b21d476aca
commit 341d49a24d
8 changed files with 120 additions and 1 deletions

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@ -11,6 +11,6 @@ FROM alpine:3.18
RUN apk add --no-cache git bash tini
COPY --from=builder /opt/src/act_runner/act_runner /usr/local/bin/act_runner
COPY run.sh /opt/act/run.sh
COPY scripts/run.sh /opt/act/run.sh
ENTRYPOINT ["/sbin/tini","--","/opt/act/run.sh"]

24
Dockerfile.rootless Normal file
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@ -0,0 +1,24 @@
FROM golang:1.20-alpine3.18 as builder
# Do not remove `git` here, it is required for getting runner version when executing `make build`
RUN apk add --no-cache make git
COPY . /opt/src/act_runner
WORKDIR /opt/src/act_runner
RUN make clean && make build
FROM docker:dind-rootless
USER root
RUN apk add --no-cache \
git bash supervisor
COPY --from=builder /opt/src/act_runner/act_runner /usr/local/bin/act_runner
COPY /scripts/supervisord.conf /etc/supervisord.conf
COPY /scripts/run.sh /opt/act/run.sh
COPY /scripts/rootless.sh /opt/act/rootless.sh
RUN mkdir /data \
&& chown rootless:rootless /data
USER rootless
ENTRYPOINT ["/usr/bin/supervisord", "-c", "/etc/supervisord.conf"]

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@ -19,6 +19,7 @@ GOFILES := $(shell find . -type f -name "*.go" -o -name "go.mod" ! -name "genera
DOCKER_IMAGE ?= gitea/act_runner
DOCKER_TAG ?= nightly
DOCKER_REF := $(DOCKER_IMAGE):$(DOCKER_TAG)
DOCKER_ROOTLESS_REF := $(DOCKER_IMAGE)_rootless:$(DOCKER_TAG)
ifneq ($(shell uname), Darwin)
EXTLDFLAGS = -extldflags "-static" $(null)
@ -169,6 +170,7 @@ docker:
ARG_DISABLE_CONTENT_TRUST=--disable-content-trust=false; \
fi; \
docker build $${ARG_DISABLE_CONTENT_TRUST} -t $(DOCKER_REF) .
docker build $${ARG_DISABLE_CONTENT_TRUST} -t $(DOCKER_ROOTLESS_REF) -f Dockerfile.rootless .
clean:
$(GO) clean -x -i ./...

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@ -6,3 +6,6 @@ Files in this directory:
- [`dind-docker.yaml`](dind-docker.yaml)
How to create a Deployment and Persistent Volume for Kubernetes to act as a runner. The Docker credentials are re-generated each time the pod connects and does not need to be persisted.
- [`rootless-docker.yaml`](rootless-docker.yaml)
How to create a rootless Deployment and Persistent Volume for Kubernetes to act as a runner. The Docker credentials are re-generated each time the pod connects and does not need to be persisted.

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@ -0,0 +1,68 @@
kind: PersistentVolumeClaim
apiVersion: v1
metadata:
name: act-runner-vol
spec:
accessModes:
- ReadWriteOnce
resources:
requests:
storage: 1Gi
storageClassName: standard
---
apiVersion: v1
data:
token: << runner registration token goes here >>
kind: Secret
metadata:
name: runner-secret
type: Opaque
---
apiVersion: apps/v1
kind: Deployment
metadata:
labels:
app: act-runner
name: act-runner
spec:
replicas: 1
selector:
matchLabels:
app: act-runner
strategy: {}
template:
metadata:
creationTimestamp: null
labels:
app: act-runner
spec:
restartPolicy: Always
volumes:
- name: runner-data
persistentVolumeClaim:
claimName: act-runner-vol
containers:
- name: runner
image: gitea/act_runner:nightly-rootless
imagePullPolicy: Always
# command: ["sh", "-c", "while ! nc -z localhost 2376 </dev/null; do echo 'waiting for docker daemon...'; sleep 5; done; /sbin/tini -- /opt/act/run.sh"]
env:
- name: DOCKER_HOST
value: tcp://localhost:2376
- name: DOCKER_CERT_PATH
value: /certs/client
- name: DOCKER_TLS_VERIFY
value: "1"
- name: GITEA_INSTANCE_URL
value: http://gitea-http.gitea.svc.cluster.local:3000
- name: GITEA_RUNNER_REGISTRATION_TOKEN
valueFrom:
secretKeyRef:
name: runner-secret
key: token
securityContext:
privileged: true
volumeMounts:
- name: runner-data
mountPath: /data

9
scripts/rootless.sh Executable file
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@ -0,0 +1,9 @@
#!/usr/bin/env bash
# wait for docker daemon
while ! nc -z localhost 2376 </dev/null; do
echo 'waiting for docker daemon...'
sleep 5
done
. /opt/act/run.sh

13
scripts/supervisord.conf Normal file
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@ -0,0 +1,13 @@
[supervisord]
nodaemon=true
logfile=/dev/null
logfile_maxbytes=0
[program:dockerd]
command=/usr/local/bin/dockerd-entrypoint.sh
[program:act_runner]
stdout_logfile=/dev/fd/1
stdout_logfile_maxbytes=0
redirect_stderr=true
command=/opt/act/rootless.sh