mirror of
https://github.com/kernelkit/infix.git
synced 2026-07-31 04:53:01 +02:00
Joachim Wiberg
fc32d8a9db
For tasks like upgrade we need, e.g., the image URI. Instead of guessing where on the container command line the image is, use a meta-data field in the container shell script. Signed-off-by: Joachim Wiberg <troglobit@gmail.com>
873 lines
20 KiB
Bash
Executable File
873 lines
20 KiB
Bash
Executable File
#!/bin/bash
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# This script can be used to start, stop, create, and delete containers.
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# It is what confd use, with the Finit container@.conf template, to set
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# up, run, and delete containers.
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#
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# NOTE: when creating/deleting containers, remember 'initctl reload' to
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# activate the changes! In confd this is already handled.
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#
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DOWNLOADS=/var/lib/containers/oci
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BUILTIN=/lib/oci
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TMPDIR=/var/tmp
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container=$0
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checksum=""
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extracted=
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timeout=30
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dir=""
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all=""
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env=""
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port=""
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force=
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log()
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{
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logger -I $PPID -t container -p local1.notice -- "$*"
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}
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err()
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{
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rc=$1; shift
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logger -I $PPID -t container -p local1.err -- "Error: $*"
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if [ -n "$extracted" ]; then
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if [ -d "$TMPDIR/$dir" ]; then
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log "Cleaning up extracted $dir"
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rm -rf "$dir"
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fi
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fi
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[ "$rc" -eq 0 ] || exit "$rc"
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}
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check()
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{
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file=$1
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if [ -z "$checksum" ]; then
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log "no checksum to verify $file against, continuing."
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return 0
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fi
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if echo "${checksum} ${file}" | "$cmdsum" -c -s; then
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log "$file checksum verified OK."
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return 0
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fi
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got=$("$cmdsum" "${file}" | awk '{print $1}')
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log "$file checksum mismatch, got $got, expected $checksum, removing file."
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rm -f "$file"
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return 1
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}
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# Fetch an OCI image over ftp/http/https. Use wget for FTP, which curl
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# empirically does not work well with. Log progress+ & error to syslog.
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fetch()
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{
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url=$1
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file=$(basename "$url")
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dst="$DOWNLOADS/$file"
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cd "$DOWNLOADS" || return
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if [ -e "$file" ]; then
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log "$file already available."
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if check "$file"; then
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echo "$dst"
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return 0
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fi
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fi
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log "Fetching $url"
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if echo "$url" | grep -qE "^ftp://"; then
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cmd="wget -q $url"
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elif echo "$url" | grep -qE "^https?://"; then
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cmd="curl $creds -sSL --fail -o \"$file\" $url"
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else
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log "Unsupported URL scheme: $url"
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return 1
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fi
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if out=$(eval "$cmd" 2>&1); then
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log "$file downloaded successfully."
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if check "$file"; then
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echo "$dst"
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return 0
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fi
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fi
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# log error message from backend
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while IFS= read -r line; do
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log "$line"
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done <<EOF
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$out
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EOF
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return 1
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}
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# Unpacks a given oci-archive.tar[.gz] in the current directory. Sanity
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# checks, at least one index.json in the top-level dir of the archive.
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# If there are more index files, this function does not handle them.
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unpack_archive()
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{
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uri=$1
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tag=$2
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img=$(basename "$uri")
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# Supported transports for load and create
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case "$uri" in
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oci:*) # Unpacked OCI image
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file=${uri#oci:}
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;;
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oci-archive:*) # Packed OCI image, .tar or .tar.gz format
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file=${uri#oci-archive:}
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;;
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ftp://* | http://* | https://*)
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if ! file=$(fetch "$uri"); then
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return 1
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fi
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;;
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*) # docker://*, docker-archive:*, or URL
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if podman image exists "$img"; then
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echo "$img"
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return 0
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fi
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# XXX: use --retry=0 with Podman 5.0 or later.
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if ! id=$(podman pull --quiet "$uri"); then
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log "Failed pulling $uri"
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return 1
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fi
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# Echo image tag to caller
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podman images --filter id="$id" --format "{{.Repository}}:{{.Tag}}"
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return 0
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;;
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esac
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if [ ! -e "$file" ]; then
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if [ -e "$DOWNLOADS/$file" ]; then
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file="$DOWNLOADS/$file"
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elif [ -e "$BUILTIN/$file" ]; then
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file="$BUILTIN/$file"
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else
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err 1 "cannot find OCI archive $file in URI $uri"
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fi
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fi
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if [ -d "$file" ]; then
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index=$(find "$file" -name index.json)
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if [ -z "$index" ]; then
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err 1 "cannot find index.json in OCI image $file"
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fi
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else
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cd "$TMPDIR" || err 0 "failed cd $TMPDIR, wiill use $(pwd) for OCI archive extraction."
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index=$(tar tf "$file" |grep index.json)
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if [ -z "$index" ]; then
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err 1 "invalid OCI archive, cannot find index.json in $file"
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fi
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[ -n "$quiet" ] || log "Extracting OCI archive $file ..."
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tar xf "$file" || err 1 "failed unpacking $file in $(pwd)"
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extracted=true
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fi
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dir=$(dirname "$index")
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if echo "$dir" | grep -q ":"; then
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if [ -z "$tag" ]; then
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tag="$dir"
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fi
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sanitized_dir=$(echo "$dir" | cut -d':' -f1)
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mv "$dir" "$sanitized_dir" || err 1 "failed renaming $dir to $sanitized_dir"
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dir="$sanitized_dir"
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fi
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[ -n "$quiet" ] || log "Loading OCI image $dir ..."
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podman load -qi "$dir" >/dev/null
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# Clean up after ourselves
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if [ -n "$extracted" ]; then
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log "Cleaning up extracted $dir"
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rm -rf "$dir"
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fi
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# Retag image from podman default $dir:latest
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if [ -n "$tag" ]; then
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podman tag "$dir" "$tag" >/dev/null
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podman rmi "$dir" >/dev/null
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else
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tag=$dir
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fi
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echo "$tag"
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}
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running()
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{
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status=$(podman inspect -f '{{.State.Status}}' "$1" 2>/dev/null)
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[ "$status" = "running" ] && return 0
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return 1
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}
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# shellcheck disable=SC2086
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create()
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{
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name=$1
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image=$2
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shift 2
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if [ -z "$name" ] || [ -z "$image" ]; then
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echo "Usage:"
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echo " container create NAME IMAGE"
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exit 1
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fi
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# Unpack and load docker-archive/oci/oci-archive, returning image
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# name, or return docker:// URL for download.
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if ! image=$(unpack_archive "$image"); then
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exit 1
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fi
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if [ -z "$logging" ]; then
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logging="--log-driver syslog"
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fi
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# When we get here we've already fetched, or pulled, the image
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args="$args --read-only --replace --quiet --cgroup-parent=containers $caps"
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args="$args --restart=$restart --systemd=false --tz=local $privileged"
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args="$args $vol $mount $hostname $entrypoint $env $port $logging"
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pidfn=/run/container:${name}.pid
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[ -n "$quiet" ] || log "---------------------------------------"
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[ -n "$quiet" ] || log "Got name: $name image: $image"
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[ -n "$quiet" ] || log "Got networks: $network"
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if [ -n "$network" ]; then
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for net in $network; do
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args="$args --net=$net"
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done
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for srv in $dns; do
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args="$args --dns=$srv"
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done
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for domain in $search; do
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args="$args --dns-search=$domain"
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done
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else
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args="$args --network=none"
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fi
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# shellcheck disable=SC2048
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log "podman create --name $name --conmon-pidfile=$pidfn $args $image $*"
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if podman create --name "$name" --conmon-pidfile="$pidfn" $args "$image" $*; then
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[ -n "$quiet" ] || log "Successfully created container $name from $image"
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[ -n "$manual" ] || start "$name"
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# Should already be enabled by confd (this is for manual use)
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initctl -bnq enable "container@${name}.conf"
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exit 0
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fi
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err 1 "failed creating container $name, please check the configuration."
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}
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delete()
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{
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name=$1
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if [ -z "$name" ]; then
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echo "Usage:"
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echo " container delete NAME"
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exit 1
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fi
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# Should already be stopped, but if not ...
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log "$name: should already be stopped, double checking ..."
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container stop "$name" >/dev/null
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while running "$name"; do
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log "$name: still running, waiting for it to stop ..."
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_=$((timeout -= 1))
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if [ $timeout -le 0 ]; then
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err 1 "timed out waiting for container $1 to stop before deleting it."
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fi
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sleep 1
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done
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log "$name: calling podman rm -vif ..."
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podman rm -vif "$name" >/dev/null 2>&1
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[ -n "$quiet" ] || log "Container $name has been removed."
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}
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waitfor()
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{
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while [ ! -f "$1" ]; do
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_=$((timeout -= 1))
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if [ $timeout -le 0 ]; then
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err 1 "timed out waiting for $1, aborting!"
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fi
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sleep 1;
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done
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}
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start()
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{
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name=$1
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if running "$name"; then
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[ -n "$quiet" ] || echo "$name: already running."
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return
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fi
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initctl start container:$name
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# Real work is done by wrap() courtesy of finit sysv emulation
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}
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stop()
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{
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name=$1
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if ! running "$name"; then
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[ -n "$quiet" ] || echo "$name: not running."
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return
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fi
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initctl stop container:$name
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# Real work is done by wrap() courtesy of finit sysv emulation
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}
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wrap()
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{
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name=$1
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cmd=$2
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# Skip "echo $name" from podman start in log
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podman "$cmd" "$name" >/dev/null
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}
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# Removes network $1 from all containers
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netwrm()
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{
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net=$1
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for c in $(podman ps $all --format "{{.Names}}"); do
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for n in $(podman inspect "$c" |jq -r '.[].NetworkSettings.Networks | keys[]'); do
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if [ "$n" = "$net" ]; then
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podman network disconnect $force "$n" "$c" >/dev/null
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fi
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done
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done
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}
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# Schedule restart of (any) container using network $1 to activate network changes
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netrestart()
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{
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net=$1
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for c in $(podman ps $all --format "{{.Names}}"); do
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for n in $(podman inspect "$c" |jq -r '.[].NetworkSettings.Networks | keys[]'); do
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if [ "$n" = "$net" ]; then
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initctl -nbq touch "container@$c"
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fi
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done
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done
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}
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cleanup()
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{
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log "Received signal, exiting."
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exit 1
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}
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usage()
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{
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cat <<EOF
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usage:
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container [opt] cmd [arg]
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options:
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-a, --all Show all, of something
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--dns NAMESERVER Set nameserver(s) when creating a container
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--dns-search LIST Set host lookup search list when creating container
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--cap-add CAP Add capability to unprivileged container
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--cap-drop CAP Drop capability, for privileged containter
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--checksum TYPE:SUM Use md5/sha256/sha512 to verify ftp/http/https archives
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-c, --creds USR[:PWD] Credentials to pass to curl -u for remote ops
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-d, --detach Detach a container started with 'run IMG [CMD]'
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-e, --env FILE Environment variables when creating container
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--entrypoint Disable container image's ENTRYPOINT, run cmd + arg
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-f, --force Force operation, e.g. remove
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-h, --help Show this help text
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--hostname NAME Set hostname when creating container
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--net NETWORK Network interface(s) when creating or finding container
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-l, --log-driver DRV Log driver to use
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--log-opt OPT Logging options to log driver
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--log-path PATH Path for k8s-file log pipe
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-m, --mount HOST:DEST Bind mount a read-only file inside a container
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--manual Do not start container automatically after creation
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-n, --name NAME Alternative way of supplying name to start/stop/restart
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--privileged Give container extended privileges
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-p, --publish PORT Publish ports when creating container
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Syntax: [[ip:][hostPort]:]containerPort[/protocol]
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-q, --quiet Quiet operation, called from confd
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-r, --restart POLICY One of "no", "always", or "on-failure:NUM"
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-s, --simple Show output in simplified format
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-t, --timeout SEC Set timeout for delete/restart commands, default: 20
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-v, --volume NAME:PATH Create named volume mounted inside container on PATH
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commands:
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create NAME IMAGE NET Create container NAME using IMAGE with networks NET
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delete [network] NAME Remove container NAME or network NAME from all containers
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exec NAME CMD Run a command inside a container
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flush Clean up lingering containers and associated anonymous volumes
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find [ifname PID] Find PID of container where '--net IFNAME' currently lives
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or, find the name of our IFNAME inside the container @PID
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help Show this help text
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list [image | oci] List names (only) of containers, images, or OCI archives
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load [NAME | URL] NM Load OCI tarball fileNAME or URL to image NM
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locate Find container that currently owns '--net IFNAME'
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remove IMAGE Remove an (unused) container image
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restart [network] NAME Restart a (crashed) container or container(s) using network
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run NAME [CMD] Run a container interactively, with an optional command
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save IMAGE FILE Save a container image to an OCI tarball FILE[.tar.gz]
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setup NAME Create and set up container as a Finit task
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shell [CMD] Start a shell, or run CMD, inside a container
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show [image | volume] Show containers, images, or volumes
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stat Show continuous stats about containers (Ctrl-C aborts)
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start [NAME] Start a container, see -n
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stop [NAME] Stop a container, see -n
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upgrade NAME Upgrade a running container (stop, pull, restart)
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volume [prune] Prune unused volumes
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EOF
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}
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while [ "$1" != "" ]; do
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case $1 in
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-a | --all)
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all="-a"
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;;
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--cap-add)
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shift
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caps="$caps --cap-add=$1"
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;;
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--cap-drop)
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shift
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caps="$caps --cap-drop=$1"
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;;
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--checksum)
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shift
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type="${1%%:*}"
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checksum="${1#*:}"
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case "$type" in
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md5)
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cmdsum=md5sum
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;;
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sha256)
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cmdsum=sha256sum
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;;
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sha512)
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cmdsum=sha512sum
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;;
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*)
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err 1 "Unsupported checksum type: $type"
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;;
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esac
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;;
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-c | --creds)
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shift
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creds="-u $1"
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;;
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-d | --detach)
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detach="-d"
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;;
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--dns)
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shift
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dns="$dns $1"
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;;
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--dns-search)
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shift
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search="$search $1"
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;;
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-e | --env)
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shift
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env="$env --env-file=$1"
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;;
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--entrypoint)
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entrypoint="--entrypoint=\"\""
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;;
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-f | --force)
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force="-f"
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;;
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-h | --help)
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usage
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exit 0
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;;
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--hostname)
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shift
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hostname="--hostname $1"
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;;
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-l | --log-driver)
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shift
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logging=" --log-driver=$1"
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;;
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--log-opt)
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shift
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logging="$logging --log-opt $1"
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;;
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--log-path)
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shift
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logging="$logging --log-opt path=$1"
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;;
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-m | --mount)
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shift
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mount="--mount=$1"
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;;
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--manual)
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manual=true
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;;
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-n | --name)
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shift
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name="$1"
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;;
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--net)
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shift
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if [ -n "$network" ]; then
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network="$network $1"
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else
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network=$1
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fi
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;;
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--privileged)
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privileged="--privileged=true"
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;;
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-p | --publish)
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shift
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port="$port -p $1"
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;;
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-q | --quiet)
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quiet="-q"
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;;
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-r | --restart)
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shift
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restart=$1
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;;
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-s | --simple)
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simple=true
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;;
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-t | --timeout)
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shift
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timeout=$1
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;;
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-v | --volume)
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shift
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vol="$vol -v $1"
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;;
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*)
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break
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;;
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esac
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shift
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done
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cmd=$1
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if [ -n "$cmd" ]; then
|
|
shift
|
|
fi
|
|
|
|
trap cleanup INT TERM
|
|
|
|
case $cmd in
|
|
# Does not work atm., cannot attach to TTY because
|
|
# we monitor 'podman start -ai foo' with Finit.
|
|
# attach)
|
|
# podman attach "$1"
|
|
# ;;
|
|
create)
|
|
[ -n "$quiet" ] || log "Got create args: $*"
|
|
create "$@"
|
|
;;
|
|
delete)
|
|
cmd=$1
|
|
[ -n "$name" ] || name=$2
|
|
if [ "$cmd" = "network" ] && [ -n "$name" ]; then
|
|
netwrm "$name"
|
|
else
|
|
[ -n "$name" ] || name=$1
|
|
delete "$name"
|
|
fi
|
|
;;
|
|
exec)
|
|
if [ -z "$name" ]; then
|
|
name="$1"
|
|
shift
|
|
fi
|
|
podman exec -i "$name" "$@"
|
|
;;
|
|
flush)
|
|
echo "Cleaning up any lingering containers";
|
|
podman rm -av $force
|
|
;;
|
|
find)
|
|
cmd=$1
|
|
pid=$2
|
|
if [ "$cmd" = "ifname" ] && [ -n "$pid" ]; then
|
|
nsenter -t "$pid" -n ip -d -j link | \
|
|
jq --arg ifname "$network" -r '.[] | select(.ifalias==$ifname) | .ifname'
|
|
else
|
|
containers=$(podman ps $all --format "{{.Names}}")
|
|
for c in $containers; do
|
|
json=$(podman inspect "$c")
|
|
nets=$(echo "$json" |jq -r '.[].NetworkSettings.Networks | keys[]' 2>/dev/null)
|
|
for n in $nets; do
|
|
if [ "$network" = "$n" ]; then
|
|
pid=$(echo "$json" | jq .[].State.Pid)
|
|
echo "$pid"
|
|
exit 0
|
|
fi
|
|
done
|
|
done
|
|
fi
|
|
;;
|
|
help)
|
|
usage
|
|
;;
|
|
load)
|
|
# shellcheck disable=SC2086
|
|
name=$(unpack_archive "$1" $2)
|
|
[ -n "$name" ] || exit 1
|
|
|
|
# Show resulting image(s) matching $name
|
|
podman images -n "$name"
|
|
;;
|
|
locate) # Find where the host's ifname lives
|
|
if [ -z "$network" ]; then
|
|
echo "Missing --net IFNAME option."
|
|
exit 1
|
|
fi
|
|
containers=$(podman ps $all --format "{{.Names}}")
|
|
for c in $containers; do
|
|
json=$(podman inspect "$c")
|
|
nets=$(echo "$json" |jq -r '.[].NetworkSettings.Networks | keys[]' 2>/dev/null)
|
|
for n in $nets; do
|
|
if [ "$network" = "$n" ]; then
|
|
echo "$c"
|
|
exit 0;
|
|
fi
|
|
done
|
|
done
|
|
;;
|
|
ls | list)
|
|
cmd=$1
|
|
[ -n "$cmd" ] && shift
|
|
case $cmd in
|
|
image*)
|
|
podman images $all --format "{{.Repository}}:{{.Tag}}"
|
|
;;
|
|
oci)
|
|
find $BUILTIN $DOWNLOADS -type f 2>/dev/null
|
|
;;
|
|
*)
|
|
podman ps $all --format "{{.Names}}"
|
|
;;
|
|
esac
|
|
;;
|
|
pull)
|
|
podman pull "$@"
|
|
;;
|
|
remove)
|
|
podman rmi $all $force -i "$1"
|
|
;;
|
|
run)
|
|
img=$1
|
|
cmd=$2
|
|
[ -n "$port" ] || port="-P"
|
|
if [ -n "$cmd" ]; then
|
|
shift 2
|
|
[ -n "$detach" ] || echo "Starting $img ENTRYPOINT $cmd :: use Ctrl-p Ctrl-q to detach"
|
|
podman run -it --rm $detach $port --entrypoint="$cmd" "$img" "$@"
|
|
else
|
|
[ -n "$detach" ] || echo "Starting $img :: use Ctrl-p Ctrl-q to detach"
|
|
podman run -it --rm $detach $port "$img"
|
|
fi
|
|
;;
|
|
save)
|
|
name=$1
|
|
file=$2
|
|
if echo "$file" | grep -q ".gz"; then
|
|
file=${file%%.gz}
|
|
gzip=true
|
|
fi
|
|
if ! echo "$file" | grep -q ".tar"; then
|
|
file=${file}.tar
|
|
gzip=true
|
|
fi
|
|
podman save -o "$file" "$name"
|
|
if [ -s "$file" ] && [ -n "$gzip" ]; then
|
|
gzip "$file"
|
|
fi
|
|
;;
|
|
setup)
|
|
[ -n "$name" ] || err 1 "setup: missing container name."
|
|
script=/run/containers/${name}.sh
|
|
[ -x "$script" ] || err 1 "setup: $script does not exist or is not executable."
|
|
while ! "$script"; do
|
|
log "${name}: setup failed, waiting for network changes ..."
|
|
read -t 60 _ < <(ip monitor address route)
|
|
|
|
# On IP address/route changes, wait a few seconds more to ensure
|
|
# the system has ample time to react and set things up for us.
|
|
log "${name}: retrying ..."
|
|
sleep 2
|
|
done
|
|
;;
|
|
shell)
|
|
if [ -z "$name" ]; then
|
|
name="$1"
|
|
shift
|
|
fi
|
|
if [ $# -gt 0 ]; then
|
|
podman exec -i "$name" sh -c "$*"
|
|
else
|
|
podman exec -it "$name" sh -l
|
|
fi
|
|
;;
|
|
show)
|
|
cmd=$1
|
|
[ -n "$cmd" ] && shift
|
|
case $cmd in
|
|
image*)
|
|
if [ -n "$simple" ]; then
|
|
podman images $all --format "{{.Names}} {{.Size}}" \
|
|
| sed 's/\[\(.*\)\] /\1 /g' \
|
|
| awk '{ printf "%-60s %s %s\n", $1, $2, $3}'
|
|
else
|
|
podman images $all
|
|
fi
|
|
;;
|
|
volume*)
|
|
printf "%-20s CONTAINER\n" "VOLUME"
|
|
for v in $(podman volume ls --format "{{.Name}}"); do
|
|
printf "%-20s" "$v"
|
|
podman ps -a --filter volume="$v" --format '{{.Names}}' | sed 's/^/ /'
|
|
done
|
|
;;
|
|
*)
|
|
if [ -n "$simple" ]; then
|
|
podman ps $all --format "{{.ID}} {{.Names}} {{.Image}}" \
|
|
| awk '{ printf "%s %-30s %s\n", $1, $2, $3}'
|
|
else
|
|
podman ps $all
|
|
fi
|
|
;;
|
|
esac
|
|
;;
|
|
start)
|
|
if [ -n "$name" ]; then
|
|
wrap "$name" start
|
|
elif [ -n "$1" ]; then
|
|
start "$1"
|
|
else
|
|
usage
|
|
exit 1
|
|
fi
|
|
;;
|
|
restart)
|
|
if [ -n "$name" ]; then
|
|
wrap "$name" restart
|
|
elif [ -n "$1" ]; then
|
|
cmd=$1
|
|
name=$2
|
|
if [ "$cmd" = "network" ] && [ -n "$name" ]; then
|
|
netrestart "$name"
|
|
else
|
|
name=$1
|
|
stop "$name"
|
|
while running "$name"; do
|
|
_=$((timeout -= 1))
|
|
if [ $timeout -le 0 ]; then
|
|
err 1 "timed out waiting for container $1 to stop before restarting it."
|
|
fi
|
|
sleep 1
|
|
done
|
|
start "$name"
|
|
fi
|
|
else
|
|
usage
|
|
exit 1
|
|
fi
|
|
;;
|
|
stop)
|
|
if [ -n "$name" ]; then
|
|
wrap "$name" stop
|
|
elif [ -n "$1" ]; then
|
|
stop "$1"
|
|
else
|
|
usage
|
|
exit 1
|
|
fi
|
|
;;
|
|
stat*)
|
|
podman stats -i 2
|
|
;;
|
|
upgrade)
|
|
# Start script used to initially create container
|
|
script=/run/containers/${1}.sh
|
|
|
|
# Find container image
|
|
img=$(podman inspect "$1" | jq -r .[].ImageName)
|
|
if [ -z "$img" ]; then
|
|
echo "No such container ($1), or invalid ImageName. Cannot upgrade."
|
|
exit 1;
|
|
fi
|
|
|
|
# Likely an OCI archive, or local directory, assume user has updated image.
|
|
if echo "$img" | grep -Eq '^localhost/'; then
|
|
file=$(awk '/^# meta-image:/ {print $3}' "$script")
|
|
echo ">> Upgrading container $1 using $file ..."
|
|
else
|
|
printf ">> Stopping ... "
|
|
podman stop "$1"
|
|
printf ">> "
|
|
podman pull "$img" || (echo "Failed fetching $img, check your network (settings)."; exit 1)
|
|
echo ">> Starting $1 ..."
|
|
fi
|
|
if ! "$script"; then
|
|
echo ">> Failed recreating container $1"
|
|
exit 1
|
|
fi
|
|
echo ">> Done."
|
|
;;
|
|
volume)
|
|
cmd=$1
|
|
[ -n "$cmd" ] && shift
|
|
case $cmd in
|
|
prune)
|
|
podman volume prune $force
|
|
;;
|
|
*)
|
|
false
|
|
;;
|
|
esac
|
|
;;
|
|
*)
|
|
if [ -n "$SERVICE_SCRIPT_TYPE" ] && [ -n "$SERVICE_ID" ]; then
|
|
case "$SERVICE_SCRIPT_TYPE" in
|
|
pre)
|
|
# Called as pre-script from Finit service
|
|
exec $container -q -n "$SERVICE_ID" setup
|
|
;;
|
|
cleanup)
|
|
# Called as cleanup-script from Finit service
|
|
log "Calling $container -n $SERVICE_ID delete"
|
|
exec $container -q -n "$SERVICE_ID" delete
|
|
;;
|
|
*)
|
|
false
|
|
;;
|
|
esac
|
|
fi
|
|
usage
|
|
exit 1
|
|
;;
|
|
esac
|