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Add CONSUL_RETRY_JOIN_WAN env and restructure examples (#48)
Resolves #47, enabling multi-region deployments with automatic configuration of relevant options in Consul. Environment variables related to these can be overridden and are documented in the README.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1 +1,2 @@ | ||
| _env | ||
| _env* | ||
| examples/triton-multi-dc/docker-compose-*.yml |
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examples/triton-multi-dc/docker-compose-multi-dc.yml.template
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,23 @@ | ||
| version: '2.1' | ||
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| services: | ||
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| # Service definition for Consul cluster running in us-east-1. | ||
| # Cloned by ../../setup-multi-datacenter.sh once per profile | ||
| consul: | ||
| image: autopilotpattern/consul:${TAG:-latest} | ||
| labels: | ||
| - triton.cns.services=consul | ||
| - com.docker.swarm.affinities=["container!=~*consul*"] | ||
| restart: always | ||
| mem_limit: 128m | ||
| ports: | ||
| - 8300 # Server RPC port | ||
| - "8302/tcp" # Serf WAN port | ||
| - "8302/udp" # Serf WAN port | ||
| - 8500 | ||
| env_file: | ||
| - ENV_FILE_NAME | ||
| network_mode: bridge | ||
| command: > | ||
| /usr/local/bin/containerpilot |
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| #!/bin/bash | ||
| set -e -o pipefail | ||
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| help() { | ||
| echo | ||
| echo 'Usage ./setup-multi-datacenter.sh <triton-profile1> [<triton-profile2> [...]]' | ||
| echo | ||
| echo 'Generates one _env file and docker-compose.yml file per triton profile, each of which' | ||
| echo 'is presumably associated with a different datacenter.' | ||
| } | ||
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| if [ "$#" -lt 1 ]; then | ||
| help | ||
| exit 1 | ||
| fi | ||
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| # --------------------------------------------------- | ||
| # Top-level commands | ||
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| # | ||
| # Check for triton profile $1 and output _env file named $2 | ||
| # | ||
| generate_env() { | ||
| local triton_profile=$1 | ||
| local output_file=$2 | ||
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| command -v docker >/dev/null 2>&1 || { | ||
| echo | ||
| tput rev # reverse | ||
| tput bold # bold | ||
| echo 'Docker is required, but does not appear to be installed.' | ||
| tput sgr0 # clear | ||
| echo 'See https://docs.joyent.com/public-cloud/api-access/docker' | ||
| exit 1 | ||
| } | ||
| command -v triton >/dev/null 2>&1 || { | ||
| echo | ||
| tput rev # reverse | ||
| tput bold # bold | ||
| echo 'Error! Joyent Triton CLI is required, but does not appear to be installed.' | ||
| tput sgr0 # clear | ||
| echo 'See https://www.joyent.com/blog/introducing-the-triton-command-line-tool' | ||
| exit 1 | ||
| } | ||
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| # make sure Docker client is pointed to the same place as the Triton client | ||
| local docker_user=$(docker info 2>&1 | awk -F": " '/SDCAccount:/{print $2}') | ||
| local docker_dc=$(echo $DOCKER_HOST | awk -F"/" '{print $3}' | awk -F'.' '{print $1}') | ||
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| local triton_user=$(triton profile get $triton_profile | awk -F": " '/account:/{print $2}') | ||
| local triton_dc=$(triton profile get $triton_profile | awk -F"/" '/url:/{print $3}' | awk -F'.' '{print $1}') | ||
| local triton_account=$(TRITON_PROFILE=$triton_profile triton account get | awk -F": " '/id:/{print $2}') | ||
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| if [ ! "$docker_user" = "$triton_user" ] || [ ! "$docker_dc" = "$triton_dc" ]; then | ||
| echo | ||
| tput rev # reverse | ||
| tput bold # bold | ||
| echo 'Error! The Triton CLI configuration does not match the Docker CLI configuration.' | ||
| tput sgr0 # clear | ||
| echo | ||
| echo "Docker user: ${docker_user}" | ||
| echo "Triton user: ${triton_user}" | ||
| echo "Docker data center: ${docker_dc}" | ||
| echo "Triton data center: ${triton_dc}" | ||
| exit 1 | ||
| fi | ||
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| local triton_cns_enabled=$(triton account get | awk -F": " '/cns/{print $2}') | ||
| if [ ! "true" == "$triton_cns_enabled" ]; then | ||
| echo | ||
| tput rev # reverse | ||
| tput bold # bold | ||
| echo 'Error! Triton CNS is required and not enabled.' | ||
| tput sgr0 # clear | ||
| echo | ||
| exit 1 | ||
| fi | ||
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| # setup environment file | ||
| if [ ! -f "$output_file" ]; then | ||
| echo '# Consul bootstrap via Triton CNS' >> $output_file | ||
| echo CONSUL=consul.svc.${triton_account}.${triton_dc}.cns.joyent.com >> $output_file | ||
| echo >> $output_file | ||
| else | ||
| echo "Existing _env file found at $1, exiting" | ||
| exit | ||
| fi | ||
| } | ||
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| declare -a written | ||
| declare -a consul_hostnames | ||
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| # check that we won't overwrite any _env files first | ||
| if [ -f "_env" ]; then | ||
| echo "Existing env file found, exiting: _env" | ||
| fi | ||
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| # check the names of _env files we expect to generate | ||
| for profile in "$@" | ||
| do | ||
| if [ -f "_env-$profile" ]; then | ||
| echo "Existing env file found, exiting: _env-$profile" | ||
| exit 2 | ||
| fi | ||
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| if [ -f "_env-$profile" ]; then | ||
| echo "Existing env file found, exiting: _env-$profile" | ||
| exit 3 | ||
| fi | ||
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| if [ -f "docker-compose-$profile.yml" ]; then | ||
| echo "Existing docker-compose file found, exiting: docker-compose-$profile.yml" | ||
| exit 4 | ||
| fi | ||
| done | ||
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| # check that the docker-compose.yml template is in the right place | ||
| if [ ! -f "docker-compose-multi-dc.yml.template" ]; then | ||
| echo "Multi-datacenter docker-compose.yml template is missing!" | ||
| exit 5 | ||
| fi | ||
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| echo "profiles: $@" | ||
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| # invoke ./setup.sh once per profile | ||
| for profile in "$@" | ||
| do | ||
| echo "Temporarily switching profile: $profile" | ||
| eval "$(TRITON_PROFILE=$profile triton env -d)" | ||
| generate_env $profile "_env-$profile" | ||
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| unset CONSUL | ||
| source "_env-$profile" | ||
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| consul_hostnames+=("\"${CONSUL//cns.joyent.com/triton.zone}\"") | ||
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| cp docker-compose-multi-dc.yml.template \ | ||
| "docker-compose-$profile.yml" | ||
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| sed -i '' "s/ENV_FILE_NAME/_env-$profile/" "docker-compose-$profile.yml" | ||
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| written+=("_env-$profile") | ||
| done | ||
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| # finalize _env and prepare docker-compose.yml files | ||
| for profile in "$@" | ||
| do | ||
| # add the CONSUL_RETRY_JOIN_WAN addresses to each _env | ||
| echo '# Consul multi-DC bootstrap via Triton CNS' >> _env-$profile | ||
| echo "CONSUL_RETRY_JOIN_WAN=$(IFS=,; echo "${consul_hostnames[*]}")" >> _env-$profile | ||
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| cp docker-compose-multi-dc.yml.template \ | ||
| "docker-compose-$profile.yml" | ||
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| sed -i '' "s/ENV_FILE_NAME/_env-$profile/" "docker-compose-$profile.yml" | ||
| done | ||
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| echo "Wrote: ${written[@]}" |
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