Files
kata-containers/utils/kata-manager.sh
Archana Shinde 7a3e13fae8 kata-manager: Add symlinks for runc and slirp4netns
For nerdctl install, add symlinks for runc and slirp4netns in the
binary install path.
runc link comes in handy for running runc containers with nerdctl fir
quick tests.
slirp4netns allows for running containers with user mode networking
useful in case of rootless containers.

Signed-off-by: Archana Shinde <archana.m.shinde@intel.com>
2024-05-31 13:53:42 -07:00

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#!/usr/bin/env bash
#
# Copyright (c) 2020 Intel Corporation
#
# SPDX-License-Identifier: Apache-2.0
#
set -o errexit
set -o nounset
set -o pipefail
set -o errtrace
[ -n "${DEBUG:-}" ] && set -o xtrace
readonly script_name=${0##*/}
readonly kata_project="Kata Containers"
readonly containerd_project="containerd"
readonly kata_slug="kata-containers/kata-containers"
readonly containerd_slug="containerd/containerd"
readonly kata_project_url="https://github.com/${kata_slug}"
readonly containerd_project_url="https://github.com/${containerd_slug}"
readonly kata_hypervisors_doc_url='https://github.com/kata-containers/kata-containers/blob/main/docs/hypervisors.md'
readonly kata_releases_url="https://api.github.com/repos/${kata_slug}/releases"
readonly containerd_releases_url="https://api.github.com/repos/${containerd_slug}/releases"
readonly containerd_io_releases_url="https://raw.githubusercontent.com/containerd/containerd.io/main/content/releases.md"
readonly docker_slug="moby/moby"
readonly docker_project="Docker (moby)"
readonly docker_releases_url="https://api.github.com/repos/${docker_slug}/releases"
readonly nerdctl_slug="containerd/nerdctl"
readonly nerdctl_project="nerdctl"
readonly nerdctl_releases_url="https://api.github.com/repos/${nerdctl_slug}/releases"
readonly nerdctl_supported_arches="x86_64 aarch64"
readonly cni_project="cni-plugins"
readonly cni_slug="containernetworking/plugins"
readonly cni_releases_url="https://api.github.com/repos/${cni_slug}/releases"
# Directory created when unpacking a binary release archive downloaded from
# $kata_releases_url.
readonly kata_install_dir="${kata_install_dir:-/opt/kata}"
# containerd shim v2 details
readonly kata_runtime_name="kata"
readonly kata_runtime_type="io.containerd.${kata_runtime_name}.v2"
readonly kata_shim_v2="containerd-shim-${kata_runtime_name}-v2"
readonly kata_configuration="configuration"
readonly kata_clh_runtime_name="kata-clh"
readonly kata_clh_runtime_type="io.containerd.${kata_clh_runtime_name}.v2"
readonly kata_clh_shim_v2="containerd-shim-${kata_clh_runtime_name}-v2"
readonly kata_clh_configuration="configuration-clh"
# Systemd unit name for containerd daemon
readonly containerd_service_name="containerd.service"
# Containerd configuration file
readonly containerd_config="/etc/containerd/config.toml"
# Directory containing packaged configuration files
readonly kata_config_dir_golang="${kata_install_dir}/share/defaults/kata-containers"
# Directory containing local configuration files
readonly kata_local_config_dir_golang="/etc/kata-containers"
# Name of the Kata configuration file (or more usually the sym-link
# to the real config file).
readonly kata_config_file_name='configuration.toml'
readonly kata_config_file_golang="${kata_local_config_dir_golang}/${kata_config_file_name}"
# Currently, the golang runtime is the default runtime.
readonly default_config_dir="$kata_config_dir_golang"
readonly local_config_dir="$kata_local_config_dir_golang"
readonly kata_config_file="$kata_config_file_golang"
readonly kata_runtime_language='golang'
readonly pristine_config_type='packaged'
# The string to display to denote a default value.
readonly default_value='default'
# String to display if a value cannot be determined
readonly unknown_tag='unknown'
readonly cfg_file_install_perms='0644'
# Directory in which to create symbolic links
readonly link_dir=${link_dir:-/usr/bin}
readonly tmpdir=$(mktemp -d)
readonly warnings=$(cat <<EOF
WARNINGS:
- Use distro-packages where possible
If your distribution packages $kata_project, you should use these packages rather
than running this script.
- Packages will **not** be automatically updated
Since a package manager is not being used, it is **your** responsibility
to ensure these packages are kept up-to-date when new versions are released
to ensure you are using a version that includes the latest security and bug fixes.
- Potentially untested versions or version combinations
This script installs the *newest* versions of $kata_project
and $containerd_project from binary release packages. These versions may
not have been tested with your distribution version.
EOF
)
die()
{
echo -e >&2 "ERROR: $*"
exit 1
}
info()
{
echo -e "INFO: $*"
}
cleanup()
{
[ -d "$tmpdir" ] && rm -rf "$tmpdir"
}
# Determine the latest GitHub release for a project.
#
# Parameter: GitHub API URL for a projects releases.
# Note: Releases are assumed to use semver (https://semver.org) version
# numbers.
github_get_latest_release()
{
local url="${1:-}"
# Notes:
#
# - The sort(1) call; none of the standard utilities support semver
# so attempt to perform a semver sort manually.
# - Pre-releases are excluded via the select() call.
local latest
latest=$(curl -sL "$url" |\
jq -r '.[].tag_name | select(contains("-") | not)' |\
sort -t '.' -V |\
tail -1 || true)
[ -z "$latest" ] && die "Cannot determine latest release from $url"
echo "$latest"
}
# Returns the actual version to download based on the specified one; if the
# specified version is blank, return the latest version.
github_resolve_version_to_download()
{
local url="${1:-}"
local requested_version="${2:-}"
local version=""
if [ -n "$requested_version" ]
then
version="$requested_version"
else
version=$(github_get_latest_release "$url" || true)
fi
echo "$version"
}
# Return the GitHub URL for a particular release's pre-built binary package.
#
# Parameters:
#
# - GitHub API URL for a project's releases.
# - Release version to look for.
github_get_release_file_url()
{
local url="${1:-}"
local version="${2:-}"
# The version, less any leading 'v'
local version_number
version_number=${version#v}
# Create an array to store architecture names
local arches=()
local arch=$(uname -m)
arches+=("$arch")
case "${arch}" in
x86_64*)
arches+=("amd64") ;;
aarch64*)
arches+=("arm64") ;;
s390x*)
arches+=("s390x") ;;
ppc64le*)
arches+=("ppc64le") ;;
*)
die "Unsupported arch. Must be x86_64, arm64, s390x, or ppc64le." ;;
esac
# Create a regular expression for matching
local regex=""
local arch_regex=$(IFS='|'; echo "${arches[*]}")
arch_regex=$(printf "(%s)" "$arch_regex")
case "$url" in
*kata*)
regex="kata-static-${version}-${arch_regex}.tar.xz" ;;
*nerdctl*)
# Keep this *always* before the containerd check, as it comes from
# the very same containerd organisation on GitHub.
regex="nerdctl-full-${version_number}-linux-${arch_regex}.tar.gz" ;;
*containerd*)
regex="containerd-${version_number}-linux-${arch_regex}.tar.gz" ;;
*containernetworking*)
regex="cni-plugins-linux-${arch_regex}-${version}.tgz" ;;
*) die "invalid url: '$url'" ;;
esac
local download_url
download_url=$(curl -sL "$url" |\
jq --arg version "$version" \
-r '.[] |
select( (.tag_name == $version) or (.tag_name == "v" + $version) ) |
.assets[].browser_download_url' |\
grep -E "/${regex}$")
download_url=$(echo "$download_url" | awk '{print $1}')
[ -z "$download_url" ] && die "Cannot determine download URL for version $version ($url)"
# Check to ensure there is only a single matching URL
local expected_count=1
local count
count=$(echo "$download_url" | wc -l)
[ "$count" -eq "$expected_count" ] || \
die "expected $expected_count download URL but found $download_url"
echo "$download_url"
}
# Download the release file for the specified projects release version and
# return the full path to the downloaded file.
#
# Parameters:
#
# - GitHub API URL for a project's releases.
# - Release version to download.
github_download_release()
{
local url="${1:-}"
local version="${2:-}"
pushd "$tmpdir" >/dev/null
local download_url
download_url=$(github_get_release_file_url \
"$url" \
"$version" || true)
[ -z "$download_url" ] && \
die "Cannot determine download URL for version $version"
# Don't specify quiet mode here so the user can observe download
# progress.
curl -LO "$download_url"
local filename
filename=$(echo "$download_url" | awk -F'/' '{print $NF}')
ls -d "${PWD}/${filename}"
popd >/dev/null
}
usage()
{
cat <<EOF
Usage: $script_name [options] [<kata-version> [<containerd-version>]]
Description: Install $kata_project [1] (and optionally $containerd_project [2])
from GitHub release binaries.
Options:
-c <flavour> : Specify containerd flavour ("lts" | "active" - default: "lts").
Find more details on LTS and Active versions of containerd on
https://containerd.io/releases/#support-horizon
-d : Enable debug for all components.
-D : Install Docker server and CLI tooling (takes priority over '-c').
-e : List short names and details for local hypervisor configuration files (for '-S').
-f : Force installation (use with care).
-h : Show this help statement.
-H <hypervisor> : Specify the hypervisor name to use when *INSTALLING* a system.
-k <version> : Specify Kata Containers version.
-K <tarball> : Specify local Kata Containers tarball to install (takes priority over '-k').
-l : List installed and available versions only, then exit (uses network).
-L : List short names and details for official packaged hypervisor configurations (for '-S').
-N : Install nerdctl (takes priority over '-c', only implemented for x86_64 and ARM).
-o : Only install Kata Containers.
-r : Don't cleanup on failure (retain files).
-S <hypervisor> : Only change the hypervisor config for an *EXISTING* installation.
-t : Disable self test (don't try to create a container after install).
-T : Only run self test (do not install anything).
Notes:
- The version strings must refer to official GitHub releases for each project.
If not specified or set to "", install the latest available version.
- The '-L' option requires an installed system.
> **Note:** For details of each hypervisor, see [3].
- If an invalid hypervisor name is specified with the '-H' option, an
error will be generated, but the system will be left in a working
state and configured to use the hypervisor configured at build time.
> **Note:** For details of each hypervisor, see [3].
- Since '-L' cannot be used until a system is installed, if you wish
to change the configured Kata hypervisor, unless you know the
hypervisor name, the recommended approach is to:
1) Install this script with no arguments to install a Kata system.
2) Run again with '-L' to list the available hypervisor configurations.
3) Run again with '-S <hypervisor>' to switch to your chosen hypervisor.
See also:
[1] - $kata_project_url
[2] - $containerd_project_url
[3] - $kata_hypervisors_doc_url
$warnings
Advice:
- You can check the latest version of Kata Containers by running
one of the following:
$ $script_name -l
$ kata-runtime check --only-list-releases
$ kata-ctl check only-list-releases
EOF
}
# Return 0 if containerd is already installed, else return 1.
containerd_installed()
{
command -v containerd &>/dev/null && return 0
systemctl list-unit-files --type service |\
grep -Eq "^${containerd_service_name}\>" \
&& return 0
return 1
}
# Return 0 if Kata is already installed, else return 1.
kata_installed()
{
command -v "$kata_shim_v2" &>/dev/null
}
# Assert that Kata is installed and error with a message if it isn't.
ensure_kata_already_installed()
{
local msg
msg=$(cat <<-EOF
$kata_project is not yet installed (or is installed in a non-standard directory).
Run this script with no options to install Kata Containers.
EOF
)
kata_installed || die "$msg"
}
pre_checks()
{
info "Running pre-checks"
local skip_containerd="${1:-}"
[ -z "$skip_containerd" ] && die "no skip_containerd value"
command -v "${kata_shim_v2}" &>/dev/null \
&& die "Please remove existing $kata_project installation"
[ "$skip_containerd" = 'true' ] && return 0
local ret
{ containerd_installed; ret=$?; } || true
[ "$ret" -eq 0 ] && die "$containerd_project already installed"
return 0
}
check_deps()
{
info "Checking dependencies"
# Maps command names to package names using a colon delimiter
local elems=()
elems+=("curl:curl")
elems+=("git:git")
elems+=("jq:jq")
elems+=("tar:tar")
local pkgs_to_install=()
local elem
for elem in "${elems[@]}"
do
local cmd
cmd=$(echo "$elem"|cut -d: -f1)
local pkg
pkg=$(echo "$elem"|cut -d: -f2-)
command -v "$cmd" &>/dev/null && continue
pkgs_to_install+=("$pkg")
done
[ "${#pkgs_to_install[@]}" -eq 0 ] && return 0
local packages
packages="${pkgs_to_install[@]}"
info "Installing packages '$packages'"
case "$ID" in
centos|rhel) sudo yum -y install $packages ;;
debian|ubuntu) sudo apt-get update && sudo apt-get -y install $packages ;;
fedora) sudo dnf -y install $packages ;;
opensuse*|sles) sudo zypper install -y $packages ;;
*) die "Cannot automatically install packages on $ID, install $packages manually and re-run"
esac
}
setup()
{
local cleanup="${1:-}"
[ -z "$cleanup" ] && die "no cleanup value"
local force="${2:-}"
[ -z "$force" ] && die "no force value"
local skip_containerd="${3:-}"
[ -z "$skip_containerd" ] && die "no skip_containerd value"
[ "$cleanup" = "true" ] && trap cleanup EXIT
source /etc/os-release || source /usr/lib/os-release
#these dependencies are needed inside this script, and should be checked regardless of the -f option.
check_deps
[ "$force" = "true" ] && return 0
pre_checks "$skip_containerd"
}
# Download the requested version of the specified project.
#
# Returns the resolve version number and the full path to the downloaded file
# separated by a colon.
github_download_package()
{
local releases_url="${1:-}"
local requested_version="${2:-}"
# Only used for error message
local project="${3:-}"
[ -z "$releases_url" ] && die "need releases URL"
[ -z "$project" ] && die "need project URL"
local version
version=$(github_resolve_version_to_download \
"$releases_url" \
"$requested_version" || true)
[ -z "$version" ] && die "Unable to determine $project version to download"
local file
file=$(github_download_release \
"$releases_url" \
"$version")
echo "${version}:${file}"
}
install_containerd()
{
local requested_version="${1:-}"
local project="$containerd_project"
local version_desc="latest version"
[ -n "$requested_version" ] && version_desc="version $requested_version"
info "Downloading $project release ($version_desc)"
local results
results=$(github_download_package \
"$containerd_releases_url" \
"$requested_version" \
"$project")
[ -z "$results" ] && die "Cannot download $project release file"
local version
version=$(echo "$results"|cut -d: -f1)
local file
file=$(echo "$results"|cut -d: -f2-)
[ -z "$version" ] && die "Cannot determine $project resolved version"
[ -z "$file" ] && die "Cannot determine $project release file"
info "Installing $project release $version from $file"
sudo tar -C /usr/local -xvf "${file}"
for file in \
/usr/local/bin/containerd \
/usr/local/bin/ctr
do
sudo ln -sf "$file" "${link_dir}"
done
info "$project installed\n"
# Installing cni plugins for containerd
install_cni
}
install_nerdctl()
{
local project="$nerdctl_project"
info "Downloading $project latest release"
local results
results=$(github_download_package \
"$nerdctl_releases_url" \
"" \
"$project")
[ -z "$results" ] && die "Cannot download $project release file"
local version
version=$(echo "$results"|cut -d: -f1)
local file
file=$(echo "$results"|cut -d: -f2-)
[ -z "$version" ] && die "Cannot determine $project resolved version"
[ -z "$file" ] && die "Cannot determine $project release file"
info "Installing $project release $version from $file"
sudo tar -C /usr/local -xvf "${file}"
for file in \
/usr/local/bin/containerd \
/usr/local/bin/ctr \
/usr/local/bin/nerdctl \
/usr/local/bin/runc \
/usr/local/bin/slirp4netns
do
sudo ln -sf "$file" "${link_dir}"
done
info "$project installed\n"
sudo mkdir -p /opt/cni/bin
# nerdctl requires cni plugins to be installed in /opt/cni/bin
# Copy extracted tarball cni files under /usr/local/libexec
sudo cp /usr/local/libexec/cni/* /opt/cni/bin/
info "cni plugins installed under /opt/cni/bin"
}
install_cni()
{
local project="$cni_project"
info "Downloading $project latest release"
local results
results=$(github_download_package \
"$cni_releases_url" \
"" \
"$project")
[ -z "$results" ] && die "Cannot download $project release file"
local version
version=$(echo "$results"|cut -d: -f1)
local file
file=$(echo "$results"|cut -d: -f2-)
[ -z "$version" ] && die "Cannot determine $project resolved version"
[ -z "$file" ] && die "Cannot determine $project release file"
info "Installing $project release $version from $file"
sudo mkdir -p /opt/cni/bin
sudo tar -C /opt/cni/bin -xvf "${file}"
info "$project installed\n"
}
configure_containerd()
{
local enable_debug="${1:-}"
[ -z "$enable_debug" ] && die "no enable debug value"
local configure_systemd_service="${2:-true}"
local project="$containerd_project"
info "Configuring $project"
if [ "$configure_systemd_service" = "true" ]
then
local systemd_unit_dir="/etc/systemd/system"
sudo mkdir -p "$systemd_unit_dir"
local dest="${systemd_unit_dir}/${containerd_service_name}"
if [ ! -f "$dest" ]
then
pushd "$tmpdir" >/dev/null
local service_url
service_url=$(printf "%s/%s/%s/%s" \
"https://raw.githubusercontent.com" \
"${containerd_slug}" \
"main" \
"${containerd_service_name}")
curl -LO "$service_url"
printf "# %s: Service installed for Kata Containers\n" \
"$(date -Iseconds)" |\
tee -a "$containerd_service_name"
sudo cp "${containerd_service_name}" "${dest}"
sudo systemctl daemon-reload
info "Installed ${dest}"
popd >/dev/null
fi
fi
# Backup the original containerd configuration:
sudo mkdir -p "$(dirname $containerd_config)"
sudo test -e "$containerd_config" || {
sudo touch "$containerd_config"
info "Created $containerd_config"
}
local original
original="${containerd_config}-pre-kata-$(date -I)"
sudo grep -q "$kata_runtime_type" "$containerd_config" || {
sudo cp "$containerd_config" "${original}"
info "Backed up containerd config file '$containerd_config' to '$original'"
}
local modified="false"
# Add the Kata Containers configuration details:
local comment_text
comment_text=$(printf "%s: Added by %s\n" \
"$(date -Iseconds)" \
"$script_name")
sudo grep -q "$kata_runtime_type" "$containerd_config" || {
cat <<-EOF | sudo tee -a "$containerd_config"
# $comment_text
[plugins]
[plugins."io.containerd.grpc.v1.cri"]
[plugins."io.containerd.grpc.v1.cri".containerd]
default_runtime_name = "${kata_runtime_name}"
[plugins."io.containerd.grpc.v1.cri".containerd.runtimes]
[plugins."io.containerd.grpc.v1.cri".containerd.runtimes.${kata_runtime_name}]
runtime_type = "${kata_runtime_type}"
privileged_without_host_devices = true
[plugins."io.containerd.grpc.v1.cri".containerd.runtimes.${kata_runtime_name}.options]
ConfigPath = "/opt/kata/share/defaults/kata-containers/${kata_configuration}.toml"
[plugins."io.containerd.grpc.v1.cri".containerd.runtimes.${kata_clh_runtime_name}]
runtime_type = "${kata_clh_runtime_type}"
privileged_without_host_devices = true
[plugins."io.containerd.grpc.v1.cri".containerd.runtimes.${kata_clh_runtime_name}.options]
ConfigPath = "/opt/kata/share/defaults/kata-containers/${kata_clh_configuration}.toml"
EOF
modified="true"
}
if [ "$enable_debug" = "true" ]
then
local debug_enabled
debug_enabled=$(awk -v RS='' '/\[debug\]/' "$containerd_config" |\
grep -E "^\s*\<level\>\s*=\s*.*\<debug\>" || true)
[ -n "$debug_enabled" ] || {
cat <<-EOF | sudo tee -a "$containerd_config"
# $comment_text
[debug]
level = "debug"
EOF
}
modified="true"
fi
[ "$modified" = "true" ] && info "Modified containerd config file '$containerd_config'"
sudo systemctl daemon-reload
sudo systemctl enable containerd
sudo systemctl start containerd
local msg="disabled"
[ "$enable_debug" = "true" ] && msg="enabled"
info "Configured $project (debug $msg)\n"
}
install_kata()
{
local requested_version="${1:-}"
local kata_tarball="${2:-}"
local project="$kata_project"
local version=""
if [ -z "$kata_tarball" ]
then
local version_desc="latest version"
[ -n "$requested_version" ] && version_desc="version $requested_version"
info "Downloading $project release ($version_desc)"
local results
results=$(github_download_package \
"$kata_releases_url" \
"$requested_version" \
"$project")
[ -z "$results" ] && die "Cannot download $project release file"
version=$(echo "$results"|cut -d: -f1)
[ -z "$version" ] && die "Cannot determine $project resolved version"
local file
file=$(echo "$results"|cut -d: -f2-)
else
file="$kata_tarball"
fi
[ -z "$file" ] && die "Cannot determine $project release file"
# Allow the containerd service to find the Kata shim and users to find
# important commands:
local create_links_for=()
create_links_for+=("$kata_shim_v2")
create_links_for+=("kata-collect-data.sh")
create_links_for+=("kata-runtime")
local from_dir
from_dir=$(printf "%s/bin" "$kata_install_dir")
info "Checking file '$file'"
# Since we're unpacking to the root directory, perform a sanity check
# on the archive first.
local unexpected
unexpected=$(tar -tf "${file}" |\
grep -Ev "^(\./$|\./opt/$|\.${kata_install_dir}/)" || true)
[ -n "$unexpected" ] && die "File '$file' contains unexpected paths: '$unexpected'"
if [ -n "$kata_tarball" ]
then
info "Installing $project release from $file"
else
info "Installing $project release $version from $file"
fi
sudo tar -C / -xvf "${file}"
[ -d "$from_dir" ] || die "$project does not exist in expected directory $from_dir"
for file in "${create_links_for[@]}"
do
local from_path
from_path=$(printf "%s/%s" "$from_dir" "$file")
[ -e "$from_path" ] || die "File $from_path not found"
sudo ln -sf "$from_path" "$link_dir"
done
info "$project installed\n"
}
configure_kata()
{
local enable_debug="${1:-}"
[ -z "$enable_debug" ] && die "no enable debug value"
local force="${2:-}"
[ -z "$force" ] && die "no force value"
local hypervisor="${3:-}"
[ "$enable_debug" = "false" ] && \
info "Using default $kata_project configuration" && \
return 0
local default_hypervisor
default_hypervisor=$(get_default_packaged_hypervisor || true)
[ -z "$hypervisor" ] && \
hypervisor="$default_hypervisor" && \
info "Using default $kata_project hypervisor ('$hypervisor')"
set_kata_config_file "$force" "$hypervisor"
local cfg_file="$kata_config_file"
# Note that '--follow-symlinks' is essential: without it,
# sed(1) will break the sym-link and convert it into a file,
# which is not desirable behaviour as the whole point of the
# "well known" config file name is that it is a sym-link to
# the actual config file.
#
# However, this option is GNU sed(1) specific so if this
# script is run on a non-Linux system, it may be necessary
# to install GNU sed, or find an equivalent option for the
# local version of sed.
sudo sed -i \
--follow-symlinks \
-e 's/^# *\(enable_debug\).*=.*$/\1 = true/g' \
-e 's/^kernel_params = "\(.*\)"/kernel_params = "\1 agent.log=debug"/g' \
"$cfg_file"
info "Configured $kata_project config file '$cfg_file' for full debug"
info "(delete '$cfg_file' to use pristine $kata_project configuration)"
}
handle_kata()
{
local version="${1:-}"
local tarball="${2:-}"
local enable_debug="${3:-}"
[ -z "$enable_debug" ] && die "no enable debug value"
local force="${4:-}"
[ -z "$force" ] && die "no force value"
local hypervisor="${5:-}"
install_kata "$version" "$tarball"
configure_kata "$enable_debug" "$force" "$hypervisor"
kata-runtime --version
}
containerd_version_number()
{
local flavour="${1:-}"
[ -z "$flavour" ] && die "need containerd flavour"
base_version="$(curl -fsSL $containerd_io_releases_url | \
grep -iE "\[d+.d+\].*| $flavour" | \
grep -oE "\[[0-9]+.[0-9]+\]" | \
grep -oE "[0-9]+.[0-9]+")"
curl --silent ${containerd_releases_url} | \
jq -r .[].tag_name | \
grep "^v${base_version}.[0-9]*$" -m1
}
handle_containerd()
{
local flavour="${1:-}"
[ -z "$flavour" ] && die "need containerd flavour"
local force="${2:-}"
[ -z "$force" ] && die "need force value"
local enable_debug="${3:-}"
[ -z "$enable_debug" ] && die "no enable debug value"
local version="$(containerd_version_number "$flavour")"
local ret
if [ "$force" = "true" ]
then
install_containerd "$version"
else
{ containerd_installed; ret=$?; } || true
if [ "$ret" -eq 0 ]
then
info "Using existing containerd installation"
else
install_containerd "$version"
fi
fi
configure_containerd "$enable_debug"
containerd --version
}
handle_docker()
{
{ containerd_installed; ret=$?; } || true
if [ "$ret" -eq 0 ]
then
info "Backing up previous $containerd_project configuration"
[ -e "$containerd_config" ] && sudo mv $containerd_config $containerd_config.system-$(date -Iseconds)
fi
local filename='get-docker.sh'
local file
file="$tmpdir/$filename"
curl -fsSL https://get.docker.com -o "$file"
sudo sh "$file"
rm -rf "$file"
sudo systemctl enable --now docker
configure_containerd "$enable_debug"
containerd --version
docker --version
}
handle_nerdctl()
{
{ containerd_installed; ret=$?; } || true
if [ "$ret" -eq 0 ]
then
info "Backing up previous $containerd_project configuration"
[ -e "$containerd_config" ] && sudo mv $containerd_config $containerd_config.system-$(date -Iseconds)
fi
install_nerdctl
configure_containerd "$enable_debug" "false"
sudo systemctl enable --now containerd
containerd --version
nerdctl --version
}
test_installation()
{
local tool="${1:-}"
[ -z "$tool" ] && die "The tool to test $kata_project with was not specified"
info "Testing $kata_project\n"
sudo kata-runtime check -v
local image="docker.io/library/busybox:latest"
sudo $tool image pull "$image"
local container_name="${script_name/./-}-test-kata"
# Used to prove that the kernel in the container
# is different to the host kernel.
cmd="sudo $tool run --runtime "$kata_runtime_type" --rm"
case "$tool" in
docker)
# docker takes the container name as `--name
# $container_name`, passed to the run option.
cmd+=" --name $container_name" ;;
esac
cmd+=" $image"
case "$tool" in
ctr)
# ctr takes the container name as a mandatory
# argument after the image name
cmd+=" $container_name" ;;
esac
cmd+=" uname -r"
info "Running \"$cmd\""
container_kernel=$(eval "$cmd" || true)
[ -z "$container_kernel" ] && die "Failed to test $kata_project"
local host_kernel
host_kernel=$(uname -r)
info "Test successful:\n"
info " Host kernel version : $host_kernel"
info " Container kernel version : $container_kernel"
echo
}
handle_installation()
{
local cleanup="${1:-}"
[ -z "$cleanup" ] && die "no cleanup value"
local force="${2:-}"
[ -z "$force" ] && die "no force value"
local skip_containerd="${3:-}"
[ -z "$skip_containerd" ] && die "no only Kata value"
local enable_debug="${4:-}"
[ -z "$enable_debug" ] && die "no enable debug value"
local disable_test="${5:-}"
[ -z "$disable_test" ] && die "no disable test value"
local only_run_test="${6:-}"
[ -z "$only_run_test" ] && die "no only run test value"
# These params can be blank
local kata_version="${7:-}"
local containerd_flavour="${8:-}"
local install_docker="${9:-}"
local install_nerdctl="${10:-}"
[ -z "$install_docker" ] && die "no install docker value"
[ -z "$install_nerdctl" ] && die "no install nerdctl value"
local kata_tarball="${11:-}"
local hypervisor="${12:-}"
# The tool to be testing the installation with
local tool="ctr"
if [ "$install_docker" = "true" ]
then
if [ "$skip_containerd" = "false" ]
then
# The script provided by docker already takes care
# of properly installing containerd
skip_containerd="true"
info "Containerd will be installed during the Docker installation ('-c' option ignored)"
fi
tool="docker"
fi
if [ "$install_nerdctl" = "true" ]
then
local arch=$(uname -m)
if ! grep -q " $arch " <<< " $nerdctl_supported_arches "
then
die "nerdctl deployment only supports $nerdctl_supported_arches"
fi
if [ "$skip_containerd" = "false" ]
then
# The script provided by nerdctl already takes care
# of properly installing containerd
skip_containerd="true"
info "Containerd will be installed during the nerdctl installation ('-c' option ignored)"
fi
tool="nerdctl"
fi
[ "$only_run_test" = "true" ] && test_installation "$tool" && return 0
setup "$cleanup" "$force" "$skip_containerd"
handle_kata \
"$kata_version" \
"$kata_tarball" \
"$enable_debug" \
"$force" \
"$hypervisor"
[ "$skip_containerd" = "false" ] && \
handle_containerd \
"$containerd_flavour" \
"$force" \
"$enable_debug"
[ "$install_docker" = "true" ] && [ "$install_nerdctl" = "true" ] && \
die "Installing docker and nerdctl at the same time is not possible."
[ "$install_docker" = "true" ] && handle_docker
[ "$install_nerdctl" = "true" ] && handle_nerdctl
[ "$disable_test" = "false" ] && test_installation "$tool"
if [ "$skip_containerd" = "true" ] && ( [ "$install_docker" = "false" ] || [ "$install_nerdctl" = "false" ] )
then
info "$kata_project is now installed"
else
local extra_projects="containerd"
[ "$install_docker" = "true" ] && extra_projects+=" and docker"
[ "$install_nerdctl" = "true" ] && extra_projects+=" and nerdctl"
info "$kata_project and $extra_projects are now installed"
fi
echo -e "\n${warnings}\n"
}
validate_containerd_flavour()
{
local flavour="${1:-}"
local flavours_regex='lts|active'
grep -qE "$flavours_regex" <<< "$flavour" || die "expected flavour to match '$flavours_regex', found '$flavour'"
}
list_versions()
{
local -r not_installed='<not installed>'
# The latest available checks will hit the network so inform the
# user what we are doing in case of network delays.
info "Getting version details"
local installed_kata
installed_kata=$("$kata_shim_v2" --version 2>/dev/null ||\
echo "$not_installed")
local installed_containerd
installed_containerd=$(containerd --version 2>/dev/null ||\
echo "$not_installed")
local installed_docker
installed_docker=$(docker --version 2>/dev/null ||\
echo "$not_installed")
local latest_kata
latest_kata=$(github_get_latest_release "$kata_releases_url" || true)
[ -z "$latest_kata" ] && \
die "cannot determine latest version of $project"
local latest_containerd
latest_containerd=$(github_get_latest_release "$containerd_releases_url" || true)
[ -z "$latest_containerd" ] && \
die "cannot determine latest version of $containerd_project"
local latest_docker
latest_docker=$(github_get_latest_release "$docker_releases_url" || true)
[ -z "$latest_docker" ] && \
die "cannot determine latest version of $docker_project"
info "$kata_project: installed version: $installed_kata"
info "$kata_project: latest version: $latest_kata"
echo
info "$containerd_project: installed version: $installed_containerd"
info "$containerd_project: latest version: $latest_containerd"
echo
info "$docker_project: installed version: $installed_docker"
info "$docker_project: latest version: $latest_docker"
}
# Returns the full path to the specified hypervisors
# configuration file in the specified directory.
#
# Note that the hypervisor "name" argument is not just a literal
# hypervisor name/alias, it is the string that matches the "*" glob
# in the pattern, "configuration-*.toml".
#
# If the specified name is "$default_value",
# use the default hypervisor configuration file name.
#
# If the specified name is not found, return the empty string.
get_hypervisor_config_file()
{
local name="${1:-}"
[ -z "$name" ] && die "need name"
local dir="${2:-}"
[ -z "$dir" ] && die "need config directory"
# Expand the default value to the name of the the default hypervisor
# config file.
if [ "$name" = "$default_value" ]
then
local file
file="${dir}/${kata_config_file_name}"
name=$(readlink -e "$file")
echo "$name" && return 0
fi
local -a cfg_files=()
mapfile -t cfg_files < <(get_hypervisor_config_file_names "$dir")
local cfg
for cfg in ${cfg_files[*]}
do
local cfg_name
cfg_name="${cfg#"${dir}/"}"
local -a possible_names=()
# Allow a file fragment name or a full name
# to be specified.
possible_names+=("configuration-${name}.toml")
possible_names+=("configuration${name}.toml")
possible_names+=("${name}.toml")
possible_names+=("${name}")
local possible
for possible in "${possible_names[@]}"
do
[ "$possible" = "$cfg_name" ] && echo "$cfg" && return 0
done
done
# Failed to find config file, but don't fail in case it's a
# local only name.
echo
}
# Return the name of the config file specified by the name fragment,
# or the empty string if no matching file found.
get_local_cfg_file()
{
local name="${1:-}"
[ -z "$name" ] && die "need name"
local dir="$local_config_dir"
get_hypervisor_config_file "$name" "$dir"
}
# Return the full path to the pristine config file specified
# by the name fragment.
get_pristine_config_file()
{
local name="${1:-}"
[ -z "$name" ] && die "need name"
local dir="${default_config_dir}"
local result
result=$(get_hypervisor_config_file "$name" "$dir")
echo "$result"
}
# Returns a list of available hypervisor configuration files
# (full paths) for the specified directory.
get_hypervisor_config_file_names()
{
local dir="${1:-}"
[ -z "$dir" ] && die "need directory"
# Note that we do not check for a trailing dash to also match
# the default config file ("configuration.toml")
echo "${dir}"/configuration*\.toml
}
# Determine the default hypervisor by looking at sym-link in the
# specified config directory.
get_default_hypervisor_by_dir()
{
local dir="${1:-}"
[ -z "$dir" ] && die "need directory"
local -a cfg_files=()
mapfile -t cfg_files < <(get_hypervisor_config_file_names "$dir")
local cfg
local cfg_type="$pristine_config_type"
local default_cfg=
# First, establish what the current default is by resolving
# the $kata_config_file_name sym link.
for cfg in ${cfg_files[*]}
do
if grep -q "/${kata_config_file_name}$" <<< "$cfg" && [ -h "$cfg" ]
then
default_cfg=$(readlink -e "$cfg")
default_cfg="${default_cfg#"${dir}/"}"
default_cfg="${default_cfg#configuration-}"
default_cfg="${default_cfg%.toml}"
break
fi
done
echo "$default_cfg"
}
# Determine the default hypervisor by looking at sym-link in the
# packaged config directory.
get_default_packaged_hypervisor()
{
local dir="$default_config_dir"
local hypervisor
hypervisor=$(get_default_hypervisor_by_dir "$dir" || true)
echo "$hypervisor"
}
# Return a list of pristine hypervisor configs, one per line.
# Each line is a tab separated list of fields:
#
# field 1: hypervisor config name.
# field 2: $default_value if this is the default hypervisor,
# otherwise an empty string.
# field 3: hypervisor config type ($pristine_config_type).
# field 4: hypervisor configs runtime type ($kata_runtime_language).
list_hypervisor_config_file_details_by_dir()
{
local dir="${1:-}"
[ -n "$dir" ] || die "need directory"
local dir_type="${2:-}"
[ -n "$dir_type" ] || die "need directory type"
# Ignore a non-existent directory
[ -d "$dir" ] || return 0
# First, establish what the current default hypervisor is.
local default_cfg
default_cfg=$(get_default_hypervisor_by_dir "$dir" || true)
local -a cfg_files=()
mapfile -t cfg_files < <(get_hypervisor_config_file_names "$dir")
local cfg
local cfg_type="$pristine_config_type"
for cfg in ${cfg_files[*]}
do
# Ignore the sym-link
grep -q "/${kata_config_file_name}$" <<< "$cfg" && [ -h "$cfg" ] && continue
local cfg_name
cfg_name="${cfg#"${dir}/"}"
cfg_name="${cfg_name#configuration-}"
cfg_name="${cfg_name%.toml}"
local cfg_default_value='-'
[ "$cfg_name" = "$default_cfg" ] && cfg_default_value="$default_value"
printf "%s\t%s\t%s\t%s\n" \
"$cfg_name" \
"$cfg_default_value" \
"$cfg_type" \
"$dir_type"
done | sort -u
}
# Display a list of packaged hypervisor config file name fragments,
# one line per config file. Each line is a set of fields.
#
# See list_hypervisor_config_file_details_by_dir() for the fields
# displayed.
list_packaged_hypervisor_config_names()
{
ensure_kata_already_installed
local golang_cfgs
golang_cfgs=$(list_hypervisor_config_file_details_by_dir \
"$kata_config_dir_golang" \
"$kata_runtime_language")
echo "${golang_cfgs}"
}
# Display a list of local hypervisor config file name fragments,
# one line per config file. Each line is a set of fields.
#
# See list_hypervisor_config_file_details_by_dir() for the fields
# displayed.
list_local_hypervisor_config_names()
{
ensure_kata_already_installed
local golang_cfgs
golang_cfgs=$(list_hypervisor_config_file_details_by_dir \
"$local_config_dir" \
"$kata_runtime_language")
echo "${golang_cfgs}"
}
# Change the configured hypervisor to the one specified.
#
# This function creates a local Kata configuration file if one does
# not exist and creates a symbolic link to it.
set_kata_config_file()
{
ensure_kata_already_installed
local force="${1:-}"
[ -z "$force" ] && die "no force value"
local hypervisor="${2:-}"
[ -z "$hypervisor" ] && die "no hypervisor value"
local hypervisor_cfg_file
hypervisor_cfg_file=$(get_pristine_config_file "$hypervisor")
sudo mkdir -p "$local_config_dir"
# The name of the local config file
local local_cfg_file
# The name of the local kata config file sym-link
local local_kata_cfg_symlink="$kata_config_file"
if [ -n "$hypervisor_cfg_file" ]
then
# A pristine hypervisor config file exists
local hypervisor_cfg_file_name
hypervisor_cfg_file_name=$(basename "$hypervisor_cfg_file")
sudo mkdir -p "$local_config_dir"
local_cfg_file="${local_config_dir}/${hypervisor_cfg_file_name}"
if [ -e "$local_cfg_file" ]
then
if [ -n "$(diff "$local_cfg_file" "$hypervisor_cfg_file")" ]
then
[ "$force" = 'false' ] && \
die "existing hypervisor config file '$local_cfg_file' differs from pristine version: '$hypervisor_cfg_file'"
fi
fi
# First, install a copy of the config file to the local config dir.
sudo install \
-o root \
-g root \
-m "$cfg_file_install_perms" \
"$hypervisor_cfg_file" \
"$local_cfg_file"
else
# There is no pristine config file, so look for a
# local-only config file.
local_cfg_file=$(get_local_cfg_file "$hypervisor" || true)
[ -z "$local_cfg_file" ] && \
die "no packaged or local hypervisor config file found for '$hypervisor'"
fi
# Next, create the standard sym-link, pointing to the
# requested hypervisor-specific config file, taking care to
# fail if the default config file is not a sym-link already.
if [ -e "$local_kata_cfg_symlink" ]
then
if [ ! -L "$local_kata_cfg_symlink" ]
then
# Don't do this, even if force is in operation
# as we don't know what the contents of the
# file are.
die "not overwriting non-sym-link config file: '$local_kata_cfg_symlink'"
fi
if [ "$force" = false ]
then
# Back up the existing version of the file
local now
now=$(date '+%Y-%m-%d.%H-%M-%S.%N')
local backup_name
backup_name="${local_kata_cfg_symlink}.${now}.saved"
sudo install -o root -g root \
-m "$cfg_file_install_perms" \
"$local_kata_cfg_symlink" \
"$backup_name"
fi
fi
local default_hypervisor
default_hypervisor=$(get_default_packaged_hypervisor || true)
# We can now safely force install the sym-link.
sudo ln -sf "$local_cfg_file" "$local_kata_cfg_symlink"
local hypervisor_descr="'$hypervisor'"
[ "$hypervisor" = "$default_value" ] || [ "$hypervisor" = "$default_hypervisor" ] && \
hypervisor_descr="'$default_hypervisor' ($default_value)"
info "Set config to $hypervisor_descr"
}
handle_args()
{
local cleanup="true"
local force="false"
local skip_containerd="false"
local disable_test="false"
local only_run_test="false"
local enable_debug="false"
local install_docker="false"
local install_nerdctl="false"
local list_versions='false'
local hypervisor="$default_value"
local switch_to_hypervisor=''
local list_available_pristine_hypervisor_configs='false'
local list_available_local_hypervisor_configs='false'
local opt
local kata_version=""
local containerd_flavour="lts"
local kata_tarball=""
while getopts "c:dDefhH:k:K:lLNorS:tT" opt "$@"
do
case "$opt" in
c) containerd_flavour="$OPTARG" ;;
d) enable_debug="true" ;;
D) install_docker="true" ;;
e) list_available_local_hypervisor_configs='true' ;;
f) force="true" ;;
h) usage; exit 0 ;;
H) hypervisor="$OPTARG" ;;
k) kata_version="$OPTARG" ;;
K) kata_tarball="$OPTARG" ;;
l) list_versions='true' ;;
L) list_available_pristine_hypervisor_configs='true' ;;
N) install_nerdctl="true" ;;
o) skip_containerd="true" ;;
r) cleanup="false" ;;
S) switch_to_hypervisor="$OPTARG" ;;
t) disable_test="true" ;;
T) only_run_test="true" ;;
*) die "invalid option: '$opt'" ;;
esac
done
shift $[$OPTIND-1]
[ "$list_versions" = 'true' ] && list_versions && exit 0
if [ "$list_available_pristine_hypervisor_configs" = true ]
then
list_packaged_hypervisor_config_names
exit 0
fi
if [ "$list_available_local_hypervisor_configs" = true ]
then
list_local_hypervisor_config_names
exit 0
fi
if [ -n "$switch_to_hypervisor" ]
then
# XXX: If the user is asking to switch hypervisor
# config, to keep life simpler and to avoid polluting
# config directories with backup files, we make the assumption
# that they have already backed up any needed config
# files.
#
# Note that the function below checks that Kata is
# installed.
force='true'
set_kata_config_file \
"$force" \
"$switch_to_hypervisor"
exit 0
fi
[ -z "$kata_version" ] && kata_version="${1:-}" || true
[ -z "$containerd_flavour" ] && containerd_flavour="${2:-}" || true
validate_containerd_flavour "$containerd_flavour"
handle_installation \
"$cleanup" \
"$force" \
"$skip_containerd" \
"$enable_debug" \
"$disable_test" \
"$only_run_test" \
"$kata_version" \
"$containerd_flavour" \
"$install_docker" \
"$install_nerdctl" \
"$kata_tarball" \
"$hypervisor"
}
main()
{
handle_args "$@"
}
main "$@"