daml/infra/vsts_agent_linux_startup.sh
Florian Klink 5f75e9d1a0 infra/vsts_agent_linux_startup.sh: warm up local caches, purge old agents (#438)
Warm up local caches by building dev-env and current daml master This is
allowed to fail, as we still want to have CI machines around, even when
their caches are only warmed up halfway.

Afterwards, we purge old agents that might still be around, that didn't
unregister themselves

This depends on #402 to be merged, as otherwise purge_old_agents.py
can't be found obviously.
2019-04-12 16:47:36 +02:00

137 lines
3.8 KiB
Bash

#!/usr/bin/env bash
# Copyright (c) 2019 Digital Asset (Switzerland) GmbH and/or its affiliates. All rights reserved.
# SPDX-License-Identifier: Apache-2.0
# Agent startup script
set -euo pipefail
## Hardening
# Commit harakiri on failure
trap "shutdown -h now" EXIT
# replace the default nameserver to not use the metadata server
echo "nameserver 8.8.8.8" > /etc/resolv.conf
# block the metadata server for non-root processes
iptables -A OUTPUT -m owner ! --uid-owner root -d 169.254.169.254 -j DROP
# delete self
rm -vf "$0"
## Install system dependencies
apt-get update -q
apt-get install -qy \
curl sudo \
bzip2 rsync \
jq liblttng-ust0 libcurl3 libkrb5-3 libicu55 zlib1g \
git \
netcat
## Install the VSTS agent
groupadd --gid 3000 vsts
useradd \
--create-home \
--gid 3000 \
--shell /bin/bash \
--uid 3000 \
vsts
su --login vsts <<'AGENT_SETUP'
set -euo pipefail
VSTS_ACCOUNT=${vsts_account}
VSTS_POOL=${vsts_pool}
VSTS_TOKEN=${vsts_token}
mkdir -p ~/agent
cd ~/agent
echo Determining matching VSTS agent...
VSTS_AGENT_RESPONSE=$(curl -sSfL \
-u "user:$VSTS_TOKEN" \
-H 'Accept:application/json;api-version=3.0-preview' \
"https://$VSTS_ACCOUNT.visualstudio.com/_apis/distributedtask/packages/agent?platform=linux-x64")
VSTS_AGENT_URL=$(echo "$VSTS_AGENT_RESPONSE" \
| jq -r '.value | map([.version.major,.version.minor,.version.patch,.downloadUrl]) | sort | .[length-1] | .[3]')
if [ -z "$VSTS_AGENT_URL" -o "$VSTS_AGENT_URL" == "null" ]; then
echo 1>&2 error: could not determine a matching VSTS agent - check that account \'$VSTS_ACCOUNT\' is correct and the token is valid for that account
exit 1
fi
echo Downloading and installing VSTS agent...
curl -sSfL "$VSTS_AGENT_URL" | tar -xz --no-same-owner
set +u
source ./env.sh
set -u
./config.sh \
--acceptTeeEula \
--agent "$(hostname)" \
--auth PAT \
--pool "$VSTS_POOL" \
--replace \
--token "$VSTS_TOKEN" \
--unattended \
--url "https://$VSTS_ACCOUNT.visualstudio.com"
AGENT_SETUP
## Hardening
chown --recursive root:root /home/vsts/agent/{*.sh,bin,externals}
## Install Nix
# This needs to run inside of a user with sudo access
echo "vsts ALL=(ALL:ALL) NOPASSWD:ALL" > /etc/sudoers.d/nix_installation
su --command "sh <(curl https://nixos.org/nix/install) --daemon" --login vsts
rm /etc/sudoers.d/nix_installation
cat <<NIX_CONF > /etc/nix/nix.conf
binary-cache-public-keys = hydra.da-int.net-1:6Oy2+KYvI7xkAOg0gJisD7Nz/6m8CmyKMbWfSKUe03g= cache.nixos.org-1:6NCHdD59X431o0gWypbMrAURkbJ16ZPMQFGspcDShjY= hydra.nixos.org-1:CNHJZBh9K4tP3EKF6FkkgeVYsS3ohTl+oS0Qa8bezVs=
binary-caches = https://nix-cache.da-ext.net https://cache.nixos.org
build-users-group = nixbld
cores = 1
max-jobs = 0
sandbox = relaxed
NIX_CONF
systemctl restart nix-daemon
# Warm up local caches by building dev-env and current daml master
# This is allowed to fail, as we still want to have CI machines
# around, even when their caches are only warmed up halfway
su --login vsts <<'CACHE_WARMUP'
# user-wide bazel disk cache override
echo "build --disk_cache=~/.cache/bazel" > ~/.bazelrc && \
git clone https://github.com/digital-asset/daml && \
cd daml && \
./ci/dev-env-install.sh && \
./build.sh "_$(uname)" || true
CACHE_WARMUP
# Purge old agents
su --login vsts <<'PURGE_OLD_AGENTS'
cd daml && \
VSTS_ACCOUNT=${vsts_account} VSTS_POOL=${vsts_pool} VSTS_TOKEN=${vsts_token} ./ci/azure-cleanup/purge_old_agents.py || true
PURGE_OLD_AGENTS
# Remove /home/vsts/daml folder that might be present from cache warmup
rm -R /home/vsts/daml || true
## Finish
# run the fake local webserver, taken from the docker image
web-server() {
while true; do
printf 'HTTP/1.1 302 Found\r\nLocation: https://%s.visualstudio.com/_admin/_AgentPool\r\n\r\n' "${vsts_account}" | nc -l -p 80 -q 0 > /dev/null
done
}
web-server &
# Start the VSTS agent
su --login --command "cd /home/vsts/agent && exec ./run.sh" - vsts