core/internal/containerd/main.go

// Copyright 2020 The Monogon Project Authors.
//
// SPDX-License-Identifier: Apache-2.0
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package containerd

import (
	"context"
	"os"
	"os/exec"

	"git.monogon.dev/source/nexantic.git/core/pkg/logbuffer"

	"golang.org/x/sys/unix"
)

// Implements supervisor.Runnable for later integration

func RunContainerd(ctx context.Context) error {
	containerdLog := logbuffer.New(1000, 16384)
	cmd := exec.CommandContext(ctx, "/containerd/bin/containerd", "--config", "/containerd/conf/config.toml")
	cmd.Stdout = containerdLog
	cmd.Stderr = containerdLog
	cmd.Env = []string{"PATH=/containerd/bin", "TMPDIR=/containerd/run/tmp"}

	if err := unix.Mount("tmpfs", "/containerd/run", "tmpfs", 0, ""); err != nil {
		panic(err)
	}
	if err := os.MkdirAll("/containerd/run/tmp", 0755); err != nil {
		panic(err)
	}

	// TODO(lorenz): Healthcheck against cri.Status() RPC

	return cmd.Run()
}