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Tweak BuilderNet recipe defaults #389

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canercidam wants to merge 3 commits into from
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Tweak BuilderNet recipe defaults #389

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a924771
change the default branch for the mkosi image
canercidam Mar 2, 2026
cb7d6ca
update default suggestions
canercidam Mar 2, 2026
cf7affc
add small warning
canercidam Mar 2, 2026
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9 changes: 5 additions & 4 deletions custom-recipes/buildernet/mkosi/README.md
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Expand Up @@ -29,13 +29,14 @@ curl -sSfL https://raw.githubusercontent.com/flashbots/builder-playground/main/i
mkdir buildernet-dev && cd buildernet-dev
builder-playground generate buildernet/mkosi

# 3. Point to the VM image
# - you can point to a local file or URL
# - alternatively you can set this in playground.yaml (see below)
# 3. Build a VM image or point to it
# Build
./scripts/build.sh
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@fkondej fkondej Mar 2, 2026

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The BuilderNet VM should be built according to flashbots-images instructions. Those might change.
I have added builder.sh as an example, and it shouldnt be used as part of regular workflow.

# or you can point to a local file or URL (can be set in playground.yaml - see below)
export BUILDERNET_IMAGE=/path/to/buildernet-qemu.qcow2

# 4. Start (runs L1 Docker stack + VM in the background)
builder-playground start playground.yaml --bind-external --detached
builder-playground start playground.yaml --bind-external

# 5. Wait for the VM to boot (~60-90s) then check readiness
./scripts/operator-api-health.sh # repeat until you see "OK"
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2 changes: 1 addition & 1 deletion custom-recipes/buildernet/mkosi/scripts/build.sh
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Expand Up @@ -7,7 +7,7 @@ PROJECT_DIR="${SCRIPT_DIR}/.."

FLASHBOTS_IMAGES_DIR="${PROJECT_DIR}/.flashbots-images"
FLASHBOTS_IMAGES_REPO="https://github.com/flashbots/flashbots-images.git"
FLASHBOTS_IMAGES_BRANCH="${FLASHBOTS_IMAGES_BRANCH:-main}"
FLASHBOTS_IMAGES_BRANCH="${FLASHBOTS_IMAGES_BRANCH:-fryd/mkosi-playground}"

if [[ ! -d "${FLASHBOTS_IMAGES_DIR}" ]]; then
echo "Cloning flashbots-images (branch: ${FLASHBOTS_IMAGES_BRANCH})..."
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