Honza Novak
b46d510cb7
- Add docs/commands.md with per-command purpose, step-by-step shell/SDK call sequences, config tables, outputs, and error conditions - Rename module from github.com/you/fc-orchestrator to github.com/kacerr/fc-orchestrator - Add KernelURL field to Config so the download URL is configurable via FC_KERNEL_URL instead of being hardcoded in Init() - Expose FC_KERNEL_URL in the usage string - Add verbose logging of dd/mkfs.ext4/mount/tar calls in buildRootfs Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
58 lines
1.7 KiB
Go
58 lines
1.7 KiB
Go
package orchestrator
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import (
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"os"
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"strconv"
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)
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// Config holds all tunables for the orchestrator.
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type Config struct {
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FCBin string // path to firecracker binary
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BaseDir string // working directory for all state
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Kernel string // path to vmlinux
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KernelURL string // URL to download vmlinux if Kernel file is missing
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Rootfs string // path to base rootfs.ext4
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VCPUs int64
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MemMiB int64
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Bridge string // host bridge name, or "none" to skip networking
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BridgeCIDR string // e.g. "172.30.0.1/24"
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GuestPrefix string // e.g. "172.30.0" — clones get .10, .11, ...
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GuestGW string
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BootArgs string
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}
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func DefaultConfig() Config {
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c := Config{
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FCBin: envOr("FC_BIN", "firecracker"),
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BaseDir: envOr("FC_BASE_DIR", "/tmp/fc-orch"),
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VCPUs: envOrInt("FC_VCPUS", 1),
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MemMiB: envOrInt("FC_MEM_MIB", 128),
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Bridge: envOr("FC_BRIDGE", "fcbr0"),
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BridgeCIDR: envOr("FC_BRIDGE_CIDR", "172.30.0.1/24"),
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GuestPrefix: envOr("FC_GUEST_PREFIX", "172.30.0"),
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GuestGW: envOr("FC_GUEST_GW", "172.30.0.1"),
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BootArgs: "console=ttyS0 reboot=k panic=1 pci=off i8042.noaux quiet loglevel=0",
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}
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c.Kernel = envOr("FC_KERNEL", c.BaseDir+"/vmlinux")
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c.KernelURL = envOr("FC_KERNEL_URL",
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"https://s3.amazonaws.com/spec.ccfc.min/firecracker-ci/20260408-ce2a467895c1-0/x86_64/vmlinux-6.1.166")
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c.Rootfs = envOr("FC_ROOTFS", c.BaseDir+"/rootfs.ext4")
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return c
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}
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func envOr(key, fallback string) string {
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if v := os.Getenv(key); v != "" {
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return v
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}
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return fallback
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}
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func envOrInt(key string, fallback int64) int64 {
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if v := os.Getenv(key); v != "" {
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if n, err := strconv.ParseInt(v, 10, 64); err == nil {
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return n
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}
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}
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return fallback
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}
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