podman を Alpine 内で動かそうとしたメモ

gistfile1.md

基本的には以下を参照: https://github.com/containers/libpod/blob/master/docs/tutorials/podman_tutorial.md

• 以下の作業はすべて docker コンテナ内
  • podman に --network=none をつけるなら --cap-add NET_ADMIN は不要

$ docker run --rm -it --cap-add SYS_ADMIN --cap-add NET_ADMIN alpine:latest sh

Installing base packages

apk add --no-cache runc git go make libc-dev linux-headers glib-dev bash gpgme-dev libseccomp-dev ip6tables ostree-dev

Building and installing conmon

export GOPATH=~/go
mkdir -p $GOPATH
git clone https://github.com/kubernetes-sigs/cri-o $GOPATH/src/github.com/kubernetes-sigs/cri-o
cd $GOPATH/src/github.com/kubernetes-sigs/cri-o
mkdir bin
make bin/conmon
install -D -m 755 bin/conmon /usr/libexec/podman/conmon
cd

Adding required configuration files

mkdir -p /etc/containers
wget https://raw.githubusercontent.com/projectatomic/registries/master/registries.conf -O /etc/containers/registries.conf
wget https://raw.githubusercontent.com/containers/skopeo/master/default-policy.json -O /etc/containers/policy.json

Installing CNI plugins

git clone https://github.com/containernetworking/plugins.git $GOPATH/src/github.com/containernetworking/plugins
cd $GOPATH/src/github.com/containernetworking/plugins
./build_linux.sh
mkdir -p /usr/libexec/cni
cp bin/* /usr/libexec/cni
cd

Installing CNI config

以下の make install.cni で同じことをするので省略。

Building and installing Podman

git clone https://github.com/containers/libpod/ $GOPATH/src/github.com/containers/libpod
cd $GOPATH/src/github.com/containers/libpod
make binaries
make install.bin install.config install.cni PREFIX=/usr SHAREDIR_CONTAINERS=/etc/containers

Installing podman configure

cat <<EOS > /etc/containers/storage.conf
[storage]
driver = "vfs"
EOS

Run podman!

# podman info # 最初の一回だけ何故か失敗する
Error: could not get runtime: no storage root specified: missing necessary StoreOptions
# podman info
host:
  BuildahVersion: 1.8-dev
  Conmon:
    package: Unknown
    path: /usr/libexec/podman/conmon
    version: 'conmon version 1.14.0-dev, commit: 26eea49cc1aea36ec7e4d06d186f718a3bd6677e'
  Distribution:
    distribution: alpine
    version: 3.9.2
  MemFree: 1775857664
  MemTotal: 4139118592
  OCIRuntime:
    package: Unknown
    path: /usr/bin/runc
    version: |-
      runc version 1.0.0-rc6+dev
      commit: 6635b4f0c6af3810594d2770f662f34ddc15b40d
      spec: 1.0.1-dev
  SwapFree: 1052471296
  SwapTotal: 1073737728
  arch: amd64
  cpus: 4
  hostname: 331eb16ef8c4
  kernel: 4.9.125-linuxkit
  os: linux
  rootless: false
  uptime: 3h 34m 24.27s (Approximately 0.12 days)
insecure registries:
  registries: []
registries:
  registries:
  - docker.io
store:
  ConfigFile: /etc/containers/storage.conf
  ContainerStore:
    number: 0
  GraphDriverName: vfs
  GraphOptions: null
  GraphRoot: /var/lib/containers/storage
  GraphStatus: {}
  ImageStore:
    number: 0
  RunRoot: /var/run/containers/storage
  VolumePath: volumes
# podman ps
CONTAINER ID  IMAGE  COMMAND  CREATED  STATUS  PORTS  NAMES
# podman run docker/whalesay cowsay hello!
Trying to pull docker.io/docker/whalesay...Getting image source signatures
...
Storing signatures
Error: container create failed: systemd cgroup flag passed, but systemd support for managing cgroups is not available
: internal libpod error

後少しに見えるががが

追記

/etc/containers/libpod.conf 中の CgroupManager を systemd から cgroupfs に変更してみる。

# podman run docker/whalesay cowsay hello!
Error: container create failed: container_linux.go:344: starting container process caused "process_linux.go:275: applying cgroup configuration for process caused \"mkdir /sys/fs/cgroup/cpuset/libpod_parent: read-only file system\""
: internal libpod error

うごご

In the above article, I installed podman to Alpine Linux using alpine:edge container and alpine:edge was executed using Docker.
I guess you can directly install podman to Alpine Linux on host machines but I did not test it.

Ok, I get it :) thank you for your replay. Will try to do as you adviced. Tnx.