HOWTO install podman in Armbian Ubuntu

armbian-ubuntu-podman.sh

# 1. Install podman
# https://podman.io/getting-started/installation#ubuntu
. /etc/os-release
echo "deb https://download.opensuse.org/repositories/devel:/kubic:/libcontainers:/stable/xUbuntu_${VERSION_ID}/ /" | sudo tee /etc/apt/sources.list.d/devel:kubic:libcontainers:stable.list
curl -L "https://download.opensuse.org/repositories/devel:/kubic:/libcontainers:/stable/xUbuntu_${VERSION_ID}/Release.key" | sudo apt-key add -
sudo apt-get update
sudo apt-get -y upgrade
sudo apt-get -y install podman

# 2. Install missing dependencies
sudo apt-get install -y uidmap fuse-overlayfs slirp4netns

# 3. Install cni-plugins
# https://github.com/containernetworking/plugins/releases
# Or sudo apt-get install -y containernetworking-plugins
sudo mkdir -p /usr/local/lib/cni
sudo tar xf cni-plugins-linux-arm64-v1.0.1.tgz -C /usr/local/lib/cni
ls -l /usr/local/lib/cni

# 4. Make an alias
sudo ln -s "$(which podman)" "$(dirname "$(which podman)")/docker"

armbian/build diff

git clone -b v21.08 --depth 1 https://github.com/armbian/build

./compile.sh docker BOARD=nanopi-r4s BRANCH=current RELEASE=focal BUILD_MINIMAL=yes BUILD_DESKTOP=no KERNEL_ONLY=no KERNEL_CONFIGURE=no COMPRESS_OUTPUTIMAGE=sha,img,xz DOWNLOAD_MIRROR=china MAINLINE_MIRROR=tuna EXTRAWIFI=no WIREGUARD=no AUFS=no

diff --git a/config/templates/Dockerfile b/config/templates/Dockerfile
index 666ac7e..ae81622 100644
--- a/config/templates/Dockerfile
+++ b/config/templates/Dockerfile
@@ -1,6 +1,7 @@
 FROM ubuntu:21.04
 ARG DEBIAN_FRONTEND=noninteractive
-RUN apt-get update && apt-get -y install \
+RUN sed -i 's/archive.ubuntu.com/mirrors.tuna.tsinghua.edu.cn/g' /etc/apt/sources.list && \
+        apt-get update && apt-get -y install \
        joe \
        software-properties-common \
        gnupg \
diff --git a/config/templates/config-docker.conf b/config/templates/config-docker.conf
index 945b6de..a49ca9b 100644
--- a/config/templates/config-docker.conf
+++ b/config/templates/config-docker.conf
@@ -39,7 +39,8 @@ DOCKER_FLAGS+=(--cap-add=SYS_ADMIN --cap-add=MKNOD --cap-add=SYS_PTRACE)
 
 # mounting things inside the container on Ubuntu won't work without this
 # https://github.com/moby/moby/issues/16429#issuecomment-217126586
-DOCKER_FLAGS+=(--security-opt=apparmor:unconfined)
+#DOCKER_FLAGS+=(--security-opt=apparmor:unconfined)
+DOCKER_FLAGS+=(--security-opt label=disable)
 
 # remove resulting container after exit to minimize clutter
 # bad side effect - named volumes are considered not attached to anything and are removed on "docker volume prune"

Sometimes when you met the SHASUM hash mismatch, you would like to download the deb directly.

Get:20 https://download.opensuse.org/repositories/devel:/kubic:/libcontainers:/stable/xUbuntu_20.04  podman 100:3.4.2-1 [17.7 MB]
Err:20 https://download.opensuse.org/repositories/devel:/kubic:/libcontainers:/stable/xUbuntu_20.04  podman 100:3.4.2-1 
  File has unexpected size (17679080 != 17706544). Mirror sync in progress? [IP: 130.236.254.253 443]
  Hashes of expected file:
   - SHA256:4eb9b58413f602cf18ec21a742acd99ae10e71df467e7b9a63c3b1f7e8229f16
   - SHA1:cf1fefe5c85321fe9b562339a79494c9eda9dd60 [weak]
   - MD5Sum:58fa232055dff2700aa55e13c7932536 [weak]
   - Filesize:17706544 [weak]
...
E: Failed to fetch https://ftp.lysator.liu.se/pub/opensuse/repositories/devel:/kubic:/libcontainers:/stable/xUbuntu_20.04/amd64/podman_3.4.2-1_amd64.deb  File has unexpected size (17679080 != 17706544). Mirror sync in progress? [IP: 130.236.254.253 443]
   Hashes of expected file:
    - SHA256:4eb9b58413f602cf18ec21a742acd99ae10e71df467e7b9a63c3b1f7e8229f16
    - SHA1:cf1fefe5c85321fe9b562339a79494c9eda9dd60 [weak]
    - MD5Sum:58fa232055dff2700aa55e13c7932536 [weak]
    - Filesize:17706544 [weak]
E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?

Like:
https://download.opensuse.org/repositories/devel:/kubic:/libcontainers:/stable/xUbuntu_20.04/amd64/podman_3.4.2-1_amd64.deb.mirrorlist
Download from original source(not from the mirror): https://download.opensuse.org/repositories/devel:/kubic:/libcontainers:/stable/xUbuntu_20.04/amd64/podman_3.4.2-1_amd64.deb

curl -LO https://download.opensuse.org/repositories/devel:/kubic:/libcontainers:/stable/xUbuntu_20.04/amd64/podman_3.4.2-1_amd64.deb
sudo apt install -y ./podman_3.4.2-1_amd64.deb