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rootfs: Create a summary file inside the image

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Create a YAML metadata file inside the rootfs image
containing information about the environment:

```
/var/lib/osbuilder/osbuilder.yaml
```

Example contents:

```
---
osbuilder:
  url: "https://github.com/kata-containers/osbuilder"
  version: "unknown"
rootfs-creation-time: "2018-04-19T16:19:30.254610305+0000Z"
description: "osbuilder rootfs"
file-format-version: "0.0.1"
architecture: "x86_64"
base-distro:
  name: "Centos"
  version: "7"
  packages:
    - "iptables"
    - "systemd"
agent:
  url: "https://github.com/kata-containers/agent"
  name: "kata-agent"
  version: "0.0.1-2ec0b9593845b9a5e0eab5a85b20d74c35a2ca52-dirty"
  agent-is-init-daemon: "no"
```

This change adds a new `-o` option to `rootfs.sh` for
specifying the version of osbuilder to the rootfs builder.

Fixes #35.

Signed-off-by: James O. D. Hunt <james.o.hunt@intel.com>
This commit is contained in:
James O. D. Hunt
2018-04-19 16:40:44 +01:00
parent 93b632c328
commit f90f65247e
7 changed files with 91 additions and 4 deletions
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62
scripts/lib.sh
View File

@@ -126,3 +126,65 @@ build_rootfs()
[ -n "${ROOTFS_DIR}" ] && rm -r "${ROOTFS_DIR}${CACHE_DIR}"
}
# Create a YAML metadata file inside the rootfs.
#
# This provides useful information about the rootfs than can be interrogated
# once the rootfs has been converted into a image/initrd.
create_summary_file()
{
local -r rootfs_dir="$1"
[ -z "$rootfs_dir" ] && die "need rootfs"
local -r file_dir="/var/lib/osbuilder"
local -r dir="${rootfs_dir}${file_dir}"
local -r filename="osbuilder.yaml"
local file="${dir}/${filename}"
local -r now=$(date '+%Y-%m-%dT%T.%N%zZ')
# sanitise package list
PACKAGES=$(echo "$PACKAGES"|tr ' ' '\n'|sort -u|tr '\n' ' ')
local -r packages=$(for pkg in ${PACKAGES}; do echo " - \"${pkg}\""; done)
mkdir -p "$dir"
# Semantic version of the summary file format.
#
# XXX: Increment every time the format of the summary file changes!
local -r format_version="0.0.1"
local -r osbuilder_url="https://github.com/kata-containers/osbuilder"
local agent="${AGENT_DEST}"
[ "$AGENT_INIT" = yes ] && agent="${init}"
local -r agent_version=$("$agent" --version|awk '{print $NF}')
cat >"$file"<<-EOT
---
osbuilder:
url: "${osbuilder_url}"
version: "${OSBUILDER_VERSION}"
rootfs-creation-time: "${now}"
description: "osbuilder rootfs"
file-format-version: "${format_version}"
architecture: "${ARCH}"
base-distro:
name: "${OS_NAME}"
version: "${OS_VERSION}"
packages:
${packages}
agent:
url: "https://${GO_AGENT_PKG}"
name: "${AGENT_BIN}"
version: "${agent_version}"
agent-is-init-daemon: "${AGENT_INIT}"
EOT
local rootfs_file="${file_dir}/$(basename "${file}")"
info "Created summary file '${rootfs_file}' inside rootfs"
}