feat: implement basic version of Talos emulator

Implemented features:
- can spawn any number of machines.
- each machine can join Omni using siderolink.
- machines run in maintenance mode, allow resource access, report basic system
  info and platform.

Signed-off-by: Artem Chernyshev <[email protected]>

.codecov.yml

@@ -0,0 +1,18 @@
+# THIS FILE WAS AUTOMATICALLY GENERATED, PLEASE DO NOT EDIT.
+#
+# Generated on 2024-04-23T19:38:57Z by kres 0610b40-dirty.
+
+codecov:
+  require_ci_to_pass: false
+
+coverage:
+  status:
+    project:
+      default:
+        target: 50%
+        threshold: 0.5%
+        base: auto
+        if_ci_failed: success
+    patch: off
+
+comment: false

.dockerignore

@@ -0,0 +1,12 @@
+# THIS FILE WAS AUTOMATICALLY GENERATED, PLEASE DO NOT EDIT.
+#
+# Generated on 2024-04-25T10:48:01Z by kres ebc009d.
+
+*
+!cmd
+!internal
+!go.mod
+!go.sum
+!.golangci.yml
+!README.md
+!.markdownlint.json

.gitignore

@@ -0,0 +1,5 @@
+# THIS FILE WAS AUTOMATICALLY GENERATED, PLEASE DO NOT EDIT.
+#
+# Generated on 2024-04-23T19:38:57Z by kres 0610b40-dirty.
+
+_out

.golangci.yml

@@ -0,0 +1,160 @@
+# THIS FILE WAS AUTOMATICALLY GENERATED, PLEASE DO NOT EDIT.
+#
+# Generated on 2024-04-25T10:48:01Z by kres ebc009d.
+
+# options for analysis running
+run:
+  timeout: 10m
+  issues-exit-code: 1
+  tests: true
+  build-tags: [ ]
+  modules-download-mode: readonly
+
+# output configuration options
+output:
+  formats:
+  - format: colored-line-number
+    path: stdout
+  print-issued-lines: true
+  print-linter-name: true
+  uniq-by-line: true
+  path-prefix: ""
+
+# all available settings of specific linters
+linters-settings:
+  dogsled:
+    max-blank-identifiers: 2
+  dupl:
+    threshold: 150
+  errcheck:
+    check-type-assertions: true
+    check-blank: true
+  exhaustive:
+    default-signifies-exhaustive: false
+  gci:
+    sections:
+      - standard # Standard section: captures all standard packages.
+      - default # Default section: contains all imports that could not be matched to another section type.
+      - prefix(github.com/siderolabs/talemu/) # Custom section: groups all imports with the specified Prefix.
+  gocognit:
+    min-complexity: 30
+  nestif:
+    min-complexity: 5
+  goconst:
+    min-len: 3
+    min-occurrences: 3
+  gocritic:
+    disabled-checks: [ ]
+  gocyclo:
+    min-complexity: 20
+  godot:
+    scope: declarations
+  gofmt:
+    simplify: true
+  goimports:
+    local-prefixes: github.com/siderolabs/talemu/
+  gomodguard: { }
+  gomnd: { }
+  govet:
+    enable-all: true
+  lll:
+    line-length: 200
+    tab-width: 4
+  misspell:
+    locale: US
+    ignore-words: [ ]
+  nakedret:
+    max-func-lines: 30
+  prealloc:
+    simple: true
+    range-loops: true # Report preallocation suggestions on range loops, true by default
+    for-loops: false # Report preallocation suggestions on for loops, false by default
+  nolintlint:
+    allow-unused: false
+    allow-no-explanation: [ ]
+    require-explanation: false
+    require-specific: true
+  rowserrcheck: { }
+  testpackage: { }
+  unparam:
+    check-exported: false
+  unused:
+    local-variables-are-used: false
+  whitespace:
+    multi-if: false   # Enforces newlines (or comments) after every multi-line if statement
+    multi-func: false # Enforces newlines (or comments) after every multi-line function signature
+  wsl:
+    strict-append: true
+    allow-assign-and-call: true
+    allow-multiline-assign: true
+    allow-cuddle-declarations: false
+    allow-trailing-comment: false
+    force-case-trailing-whitespace: 0
+    force-err-cuddling: false
+    allow-separated-leading-comment: false
+  gofumpt:
+    extra-rules: false
+  cyclop:
+    # the maximal code complexity to report
+    max-complexity: 20
+  #  depguard:
+  #    Main:
+  #      deny:
+  #        - github.com/OpenPeeDeeP/depguard # this is just an example
+
+linters:
+  enable-all: true
+  disable-all: false
+  fast: false
+  disable:
+    - exhaustivestruct
+    - exhaustruct
+    - forbidigo
+    - funlen
+    - gochecknoglobals
+    - gochecknoinits
+    - godox
+    - goerr113
+    - gomnd
+    - gomoddirectives
+    - gosec
+    - inamedparam
+    - ireturn
+    - nestif
+    - nonamedreturns
+    - nosnakecase
+    - paralleltest
+    - tagalign
+    - tagliatelle
+    - thelper
+    - typecheck
+    - varnamelen
+    - wrapcheck
+    - depguard # Disabled because starting with golangci-lint 1.53.0 it doesn't allow denylist alone anymore
+    - testifylint # complains about our assert recorder and has a number of false positives for assert.Greater(t, thing, 1)
+    - protogetter # complains about us using Value field on typed spec, instead of GetValue which has a different signature
+    - perfsprint # complains about us using fmt.Sprintf in non-performance critical code, updating just kres took too long
+    # abandoned linters for which golangci shows the warning that the repo is archived by the owner
+    - deadcode
+    - golint
+    - ifshort
+    - interfacer
+    - maligned
+    - scopelint
+    - structcheck
+    - varcheck
+    # disabled as it seems to be broken - goes into imported libraries and reports issues there
+    - musttag
+
+issues:
+  exclude: [ ]
+  exclude-rules: [ ]
+  exclude-use-default: false
+  exclude-case-sensitive: false
+  max-issues-per-linter: 10
+  max-same-issues: 3
+  new: false
+
+severity:
+  default-severity: error
+  case-sensitive: false

Dockerfile

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+# syntax = docker/dockerfile-upstream:1.7.0-labs
+
+# THIS FILE WAS AUTOMATICALLY GENERATED, PLEASE DO NOT EDIT.
+#
+# Generated on 2024-04-25T10:48:01Z by kres ebc009d.
+
+ARG TOOLCHAIN
+
+# cleaned up specs and compiled versions
+FROM scratch AS generate
+
+FROM ghcr.io/siderolabs/ca-certificates:v1.7.0 AS image-ca-certificates
+
+FROM ghcr.io/siderolabs/fhs:v1.7.0 AS image-fhs
+
+# runs markdownlint
+FROM docker.io/node:21.7.3-alpine3.19 AS lint-markdown
+WORKDIR /src
+RUN npm i -g [email protected]
+RUN npm i [email protected]
+COPY .markdownlint.json .
+COPY ./README.md ./README.md
+RUN markdownlint --ignore "CHANGELOG.md" --ignore "**/node_modules/**" --ignore '**/hack/chglog/**' --rules node_modules/sentences-per-line/index.js .
+
+# base toolchain image
+FROM ${TOOLCHAIN} AS toolchain
+RUN apk --update --no-cache add bash curl build-base protoc protobuf-dev
+
+# build tools
+FROM --platform=${BUILDPLATFORM} toolchain AS tools
+ENV GO111MODULE on
+ARG CGO_ENABLED
+ENV CGO_ENABLED ${CGO_ENABLED}
+ARG GOTOOLCHAIN
+ENV GOTOOLCHAIN ${GOTOOLCHAIN}
+ARG GOEXPERIMENT
+ENV GOEXPERIMENT ${GOEXPERIMENT}
+ENV GOPATH /go
+ARG DEEPCOPY_VERSION
+RUN --mount=type=cache,target=/root/.cache/go-build --mount=type=cache,target=/go/pkg go install github.com/siderolabs/deep-copy@${DEEPCOPY_VERSION} \
+	&& mv /go/bin/deep-copy /bin/deep-copy
+ARG GOLANGCILINT_VERSION
+RUN --mount=type=cache,target=/root/.cache/go-build --mount=type=cache,target=/go/pkg go install github.com/golangci/golangci-lint/cmd/golangci-lint@${GOLANGCILINT_VERSION} \
+	&& mv /go/bin/golangci-lint /bin/golangci-lint
+RUN --mount=type=cache,target=/root/.cache/go-build --mount=type=cache,target=/go/pkg go install golang.org/x/vuln/cmd/govulncheck@latest \
+	&& mv /go/bin/govulncheck /bin/govulncheck
+ARG GOIMPORTS_VERSION
+RUN --mount=type=cache,target=/root/.cache/go-build --mount=type=cache,target=/go/pkg go install golang.org/x/tools/cmd/goimports@${GOIMPORTS_VERSION} \
+	&& mv /go/bin/goimports /bin/goimports
+ARG GOFUMPT_VERSION
+RUN go install mvdan.cc/gofumpt@${GOFUMPT_VERSION} \
+	&& mv /go/bin/gofumpt /bin/gofumpt
+
+# tools and sources
+FROM tools AS base
+WORKDIR /src
+COPY go.mod go.mod
+COPY go.sum go.sum
+RUN cd .
+RUN --mount=type=cache,target=/go/pkg go mod download
+RUN --mount=type=cache,target=/go/pkg go mod verify
+COPY ./cmd ./cmd
+COPY ./internal ./internal
+RUN --mount=type=cache,target=/go/pkg go list -mod=readonly all >/dev/null
+
+# runs gofumpt
+FROM base AS lint-gofumpt
+RUN FILES="$(gofumpt -l .)" && test -z "${FILES}" || (echo -e "Source code is not formatted with 'gofumpt -w .':\n${FILES}"; exit 1)
+
+# runs goimports
+FROM base AS lint-goimports
+RUN FILES="$(goimports -l -local github.com/siderolabs/talemu/ .)" && test -z "${FILES}" || (echo -e "Source code is not formatted with 'goimports -w -local github.com/siderolabs/talemu/ .':\n${FILES}"; exit 1)
+
+# runs golangci-lint
+FROM base AS lint-golangci-lint
+WORKDIR /src
+COPY .golangci.yml .
+ENV GOGC 50
+RUN golangci-lint config verify --config .golangci.yml
+RUN --mount=type=cache,target=/root/.cache/go-build --mount=type=cache,target=/root/.cache/golangci-lint --mount=type=cache,target=/go/pkg golangci-lint run --config .golangci.yml
+
+# runs govulncheck
+FROM base AS lint-govulncheck
+WORKDIR /src
+RUN --mount=type=cache,target=/root/.cache/go-build --mount=type=cache,target=/go/pkg govulncheck ./...
+
+# builds talemu-linux-amd64
+FROM base AS talemu-linux-amd64-build
+COPY --from=generate / /
+WORKDIR /src/cmd/talemu
+ARG GO_BUILDFLAGS
+ARG GO_LDFLAGS
+RUN --mount=type=cache,target=/root/.cache/go-build --mount=type=cache,target=/go/pkg go build ${GO_BUILDFLAGS} -ldflags "${GO_LDFLAGS}" -o /talemu-linux-amd64
+
+# runs unit-tests with race detector
+FROM base AS unit-tests-race
+WORKDIR /src
+ARG TESTPKGS
+RUN --mount=type=cache,target=/root/.cache/go-build --mount=type=cache,target=/go/pkg --mount=type=cache,target=/tmp CGO_ENABLED=1 go test -v -race -count 1 ${TESTPKGS}
+
+# runs unit-tests
+FROM base AS unit-tests-run
+WORKDIR /src
+ARG TESTPKGS
+RUN --mount=type=cache,target=/root/.cache/go-build --mount=type=cache,target=/go/pkg --mount=type=cache,target=/tmp go test -v -covermode=atomic -coverprofile=coverage.txt -coverpkg=${TESTPKGS} -count 1 ${TESTPKGS}
+
+FROM scratch AS talemu-linux-amd64
+COPY --from=talemu-linux-amd64-build /talemu-linux-amd64 /talemu-linux-amd64
+
+FROM scratch AS unit-tests
+COPY --from=unit-tests-run /src/coverage.txt /coverage-unit-tests.txt
+
+FROM talemu-linux-${TARGETARCH} AS talemu
+
+FROM scratch AS talemu-all
+COPY --from=talemu-linux-amd64 / /
+
+FROM scratch AS image-talemu
+ARG TARGETARCH
+COPY --from=talemu talemu-linux-${TARGETARCH} /talemu
+COPY --from=image-fhs / /
+COPY --from=image-ca-certificates / /
+LABEL org.opencontainers.image.source https://github.com/siderolabs/talemu
+ENTRYPOINT ["/talemu"]
+