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swarm/dev: add development environment (#14332)

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This PR adds a Swarm development environment which can be run in a
Docker container and provides scripts for building binaries and running
Swarm clusters.
This commit is contained in:
Lewis Marshall
2017-06-01 11:52:18 +01:00
committed by Felix Lange
parent 727eadacca
commit 0036e2a747
11 changed files with 726 additions and 0 deletions
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swarm/dev/scripts/boot-cluster.sh Executable file
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#!/bin/bash
#
# A script to boot a dev swarm cluster on a Linux host (typically in a Docker
# container started with swarm/dev/run.sh).
#
# The cluster contains a bootnode, a geth node and multiple swarm nodes, with
# each node having its own data directory in a base directory passed with the
# --dir flag (default is swarm/dev/cluster).
#
# To avoid using different ports for each node and to make networking more
# realistic, each node gets its own network namespace with IPs assigned from
# the 192.168.33.0/24 subnet:
#
# bootnode: 192.168.33.2
# geth: 192.168.33.3
# swarm: 192.168.33.10{1,2,...,n}
set -e
ROOT="$(cd "$(dirname "$0")/../../.." && pwd)"
source "${ROOT}/swarm/dev/scripts/util.sh"
# DEFAULT_BASE_DIR is the default base directory to store node data
DEFAULT_BASE_DIR="${ROOT}/swarm/dev/cluster"
# DEFAULT_CLUSTER_SIZE is the default swarm cluster size
DEFAULT_CLUSTER_SIZE=3
# Linux bridge configuration for connecting the node network namespaces
BRIDGE_NAME="swarmbr0"
BRIDGE_IP="192.168.33.1"
# static bootnode configuration
BOOTNODE_IP="192.168.33.2"
BOOTNODE_PORT="30301"
BOOTNODE_KEY="32078f313bea771848db70745225c52c00981589ad6b5b49163f0f5ee852617d"
BOOTNODE_PUBKEY="760c4460e5336ac9bbd87952a3c7ec4363fc0a97bd31c86430806e287b437fd1b01abc6e1db640cf3106b520344af1d58b00b57823db3e1407cbc433e1b6d04d"
BOOTNODE_URL="enode://${BOOTNODE_PUBKEY}@${BOOTNODE_IP}:${BOOTNODE_PORT}"
# static geth configuration
GETH_IP="192.168.33.3"
GETH_RPC_PORT="8545"
GETH_RPC_URL="http://${GETH_IP}:${GETH_RPC_PORT}"
usage() {
cat >&2 <<USAGE
usage: $0 [options]
Boot a dev swarm cluster.
OPTIONS:
-d, --dir DIR Base directory to store node data [default: ${DEFAULT_BASE_DIR}]
-s, --size SIZE Size of swarm cluster [default: ${DEFAULT_CLUSTER_SIZE}]
-h, --help Show this message
USAGE
}
main() {
local base_dir="${DEFAULT_BASE_DIR}"
local cluster_size="${DEFAULT_CLUSTER_SIZE}"
parse_args "$@"
local pid_dir="${base_dir}/pids"
local log_dir="${base_dir}/logs"
mkdir -p "${base_dir}" "${pid_dir}" "${log_dir}"
stop_cluster
create_network
start_bootnode
start_geth_node
start_swarm_nodes
}
parse_args() {
while true; do
case "$1" in
-h | --help)
usage
exit 0
;;
-d | --dir)
if [[ -z "$2" ]]; then
fail "--dir flag requires an argument"
fi
base_dir="$2"
shift 2
;;
-s | --size)
if [[ -z "$2" ]]; then
fail "--size flag requires an argument"
fi
cluster_size="$2"
shift 2
;;
*)
break
;;
esac
done
if [[ $# -ne 0 ]]; then
usage
fail "ERROR: invalid arguments: $@"
fi
}
stop_cluster() {
info "stopping existing cluster"
"${ROOT}/swarm/dev/scripts/stop-cluster.sh" --dir "${base_dir}"
}
# create_network creates a Linux bridge which is used to connect the node
# network namespaces together
create_network() {
local subnet="${BRIDGE_IP}/24"
info "creating ${subnet} network on ${BRIDGE_NAME}"
ip link add name "${BRIDGE_NAME}" type bridge
ip link set dev "${BRIDGE_NAME}" up
ip address add "${subnet}" dev "${BRIDGE_NAME}"
}
# start_bootnode starts a bootnode which is used to bootstrap the geth and
# swarm nodes
start_bootnode() {
local key_file="${base_dir}/bootnode.key"
echo -n "${BOOTNODE_KEY}" > "${key_file}"
local args=(
--addr "${BOOTNODE_IP}:${BOOTNODE_PORT}"
--nodekey "${key_file}"
--verbosity "6"
)
start_node "bootnode" "${BOOTNODE_IP}" "$(which bootnode)" ${args[@]}
}
# start_geth_node starts a geth node with --datadir pointing at <base-dir>/geth
# and a single, unlocked account with password "geth"
start_geth_node() {
local dir="${base_dir}/geth"
mkdir -p "${dir}"
local password="geth"
echo "${password}" > "${dir}/password"
# create an account if necessary
if [[ ! -e "${dir}/keystore" ]]; then
info "creating geth account"
create_account "${dir}" "${password}"
fi
# get the account address
local address="$(jq --raw-output '.address' ${dir}/keystore/*)"
if [[ -z "${address}" ]]; then
fail "failed to get geth account address"
fi
local args=(
--datadir "${dir}"
--networkid "321"
--bootnodes "${BOOTNODE_URL}"
--unlock "${address}"
--password "${dir}/password"
--rpc
--rpcaddr "${GETH_IP}"
--rpcport "${GETH_RPC_PORT}"
--verbosity "6"
)
start_node "geth" "${GETH_IP}" "$(which geth)" ${args[@]}
}
start_swarm_nodes() {
for i in $(seq 1 ${cluster_size}); do
start_swarm_node "${i}"
done
}
# start_swarm_node starts a swarm node with a name like "swarmNN" (where NN is
# a zero-padded integer like "07"), --datadir pointing at <base-dir>/<name>
# (e.g. <base-dir>/swarm07) and a single account with <name> as the password
start_swarm_node() {
local num=$1
local name="swarm$(printf '%02d' ${num})"
local ip="192.168.33.1$(printf '%02d' ${num})"
local dir="${base_dir}/${name}"
mkdir -p "${dir}"
local password="${name}"
echo "${password}" > "${dir}/password"
# create an account if necessary
if [[ ! -e "${dir}/keystore" ]]; then
info "creating account for ${name}"
create_account "${dir}" "${password}"
fi
# get the account address
local address="$(jq --raw-output '.address' ${dir}/keystore/*)"
if [[ -z "${address}" ]]; then
fail "failed to get swarm account address"
fi
local args=(
--bootnodes "${BOOTNODE_URL}"
--datadir "${dir}"
--identity "${name}"
--ethapi "${GETH_RPC_URL}"
--bzznetworkid "321"
--bzzaccount "${address}"
--password "${dir}/password"
--verbosity "6"
)
start_node "${name}" "${ip}" "$(which swarm)" ${args[@]}
}
# start_node runs the node command as a daemon in a network namespace
start_node() {
local name="$1"
local ip="$2"
local path="$3"
local cmd_args=${@:4}
info "starting ${name} with IP ${ip}"
create_node_network "${name}" "${ip}"
# add a marker to the log file
cat >> "${log_dir}/${name}.log" <<EOF
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
Starting ${name} node - $(date)
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
EOF
# run the command in the network namespace using start-stop-daemon to
# daemonise the process, sending all output to the log file
local daemon_args=(
--start
--background
--no-close
--make-pidfile
--pidfile "${pid_dir}/${name}.pid"
--exec "${path}"
)
if ! ip netns exec "${name}" start-stop-daemon ${daemon_args[@]} -- $cmd_args &>> "${log_dir}/${name}.log"; then
fail "could not start ${name}, check ${log_dir}/${name}.log"
fi
}
# create_node_network creates a network namespace and connects it to the Linux
# bridge using a veth pair
create_node_network() {
local name="$1"
local ip="$2"
# create the namespace
ip netns add "${name}"
# create the veth pair
local veth0="veth${name}0"
local veth1="veth${name}1"
ip link add name "${veth0}" type veth peer name "${veth1}"
# add one end to the bridge
ip link set dev "${veth0}" master "${BRIDGE_NAME}"
ip link set dev "${veth0}" up
# add the other end to the namespace, rename it eth0 and give it the ip
ip link set dev "${veth1}" netns "${name}"
ip netns exec "${name}" ip link set dev "${veth1}" name "eth0"
ip netns exec "${name}" ip link set dev "eth0" up
ip netns exec "${name}" ip address add "${ip}/24" dev "eth0"
}
create_account() {
local dir=$1
local password=$2
geth --datadir "${dir}" --password /dev/stdin account new <<< "${password}"
}
main "$@"