Add kubernetes tentacle docker build (#699)

docker-compose.build.yml

@@ -10,6 +10,17 @@ services:
                 BUILD_NUMBER: ${BUILD_NUMBER:?err}
         image: docker.packages.octopushq.com/octopusdeploy/tentacle:${BUILD_NUMBER?err}-linux
 
+    octopusdeploy-kubernetes-tentacle-linux:
+        platform: "linux/${BUILD_ARCH:?err}"
+        build:
+            context: .
+            dockerfile: ./docker/kubernetes-tentacle/Dockerfile
+            args:
+                BUILD_DATE: ${BUILD_DATE:?err}
+                BUILD_NUMBER: ${BUILD_NUMBER:?err}
+                BUILD_ARCH: ${BUILD_ARCH:?err}
+        image: docker.packages.octopushq.com/octopusdeploy/kubernetes-tentacle:${BUILD_NUMBER?err}-linux-${BUILD_ARCH:?err}
+
     octopusdeploy-tentacle-windows-2019:
         build:
             context: .

docker/kubernetes-tentacle/Dockerfile

@@ -0,0 +1,61 @@
+FROM mcr.microsoft.com/dotnet/runtime-deps:6.0
+
+ARG BUILD_NUMBER
+ARG BUILD_DATE
+ARG BUILD_ARCH
+
+EXPOSE 10933
+
+WORKDIR /tmp
+
+COPY docker/kubernetes-tentacle/scripts/* /scripts/
+RUN chmod +x /scripts/*.sh
+
+# Install Tentacle
+COPY _artifacts/deb/tentacle_${BUILD_NUMBER}_${BUILD_ARCH}.deb /tmp/
+RUN apt-get update
+RUN apt install ./tentacle_${BUILD_NUMBER}_${BUILD_ARCH}.deb -y
+RUN apt-get clean
+RUN rm -rf /var/lib/apt/lists/*
+
+WORKDIR /
+
+# We know this won't reduce the image size at all. It's just to make the filesystem a little tidier.
+RUN rm -rf /tmp/*
+
+ENV OCTOPUS_RUNNING_IN_CONTAINER=Y
+ENV ACCEPT_EULA=N
+ENV CustomPublicHostName=""
+ENV ListeningPort=""
+ENV MachinePolicy="Default Machine Policy"
+ENV PublicHostNameConfiguration="ComputerName"
+ENV ServerApiKey=""
+ENV ServerPassword=""
+ENV ServerUsername=""
+ENV ServerCommsAddress=""
+ENV ServerPort=""
+ENV ServerUrl=""
+ENV Space="Default"
+ENV TargetEnvironment=""
+ENV TargetName=""
+ENV TargetRole=""
+ENV TargetTenant=""
+ENV TargetTenantTag=""
+ENV TargetTenantedDeploymentParticipation=""
+ENV OCTOPUS__K8STENTACLE__NAMESPACE=""
+ENV OCTOPUS__K8STENTACLE__USEJOBS="True"
+ENV OCTOPUS__K8STENTACLE__JOBSERVICEACCOUNTNAME=""
+ENV OCTOPUS__K8STENTACLE__JOBVOLUMEYAML=""
+
+CMD /scripts/configure-tentacle.sh && /scripts/run-tentacle.sh
+
+LABEL \
+    org.label-schema.schema-version="1.0" \
+    org.label-schema.name="Octopus Deploy Kubernetes Tentacle" \
+    org.label-schema.vendor="Octopus Deploy" \
+    org.label-schema.url="https://octopus.com" \
+    org.label-schema.vcs-url="https://github.com/OctopusDeploy/OctopusTentacle" \
+    org.label-schema.license="Apache"  \
+    org.label-schema.description="Octopus Kubernetes Tentacle instance with auto-registration to Octopus Server" \
+    org.label-schema.version=${BUILD_NUMBER} \
+    org.label-schema.build-date=${BUILD_DATE}

docker/kubernetes-tentacle/scripts/configure-tentacle.sh

@@ -0,0 +1,211 @@
+#!/bin/bash
+set -e
+
+if [[ "$ACCEPT_EULA" != "Y" ]]; then
+    echo "ERROR: You must accept the EULA at https://octopus.com/company/legal by passing an environment variable 'ACCEPT_EULA=Y'"
+    exit 1
+fi
+
+# Tentacle Docker images only support once instance per container. Running multiple instances can be achieved by running multiple containers.
+instanceName=Tentacle
+configurationDirectory=/etc/octopus
+applicationsDirectory=/home/Octopus/Applications
+internalListeningPort=10933
+
+mkdir -p $configurationDirectory
+mkdir -p $applicationsDirectory
+
+if [ ! -f /usr/bin/tentacle ]; then
+    ln -s /opt/octopus/tentacle/Tentacle /usr/bin/tentacle
+fi
+
+function getPublicHostName() {
+    if [[ "$PublicHostNameConfiguration" == "PublicIp" ]]; then
+        curl https://api.ipify.org/
+    elif [[ "$PublicHostNameConfiguration" == "FQDN" ]]; then
+        hostname --fqdn
+    elif [[ "$PublicHostNameConfiguration" == "ComputerName" ]]; then
+        hostname
+    else
+        echo $CustomPublicHostName
+    fi
+}
+
+function validateVariables() {
+    if [[ -z "$ServerApiKey" && -z "$BearerToken" ]]; then
+        if [[ -z "$ServerPassword" || -z "$ServerUsername" ]]; then
+            echo "Please specify either an API key, a Bearer Token or a username/password with the 'ServerApiKey' or 'ServerUsername'/'ServerPassword' environment variables" >&2
+            exit 1
+        fi
+    fi
+
+    if [[ -z "$ServerUrl" ]]; then
+        echo "Please specify an Octopus Server with the 'ServerUrl' environment variable" >&2
+        exit 1
+    fi
+
+    if [[ -z "$TargetEnvironment" ]]; then
+        echo "Please specify one or more environment names (comma delimited) with the 'TargetEnvironment' environment variable" >&2
+        exit 1
+    fi
+
+    if [[ -z "$TargetRole" ]]; then
+        echo "Please specify one or more role names (comma delimited) with the 'TargetRole' environment variable" >&2
+        exit 1
+    fi
+
+    echo " - server endpoint '$ServerUrl'"
+    echo " - api key '##########'"
+
+    if [[ ! -z "$ServerCommsAddress" || ! -z "$ServerPort" ]]; then
+        echo " - communication mode 'Kubernetes' (Polling)"
+
+        if [[ ! -z "$ServerCommsAddress" ]]; then
+            echo " - server comms address $ServerCommsAddress"
+        fi
+        if [[ ! -z "$ServerPort" ]]; then
+            echo " - server port $ServerPort"
+        fi
+    else
+        echo " - communication mode 'Kubernetes' (Listening)"
+        echo " - registered port $ListeningPort"
+    fi
+
+    echo " - environment '$TargetEnvironment'"
+    echo " - role '$TargetRole'"
+    echo " - host '$PublicHostNameConfiguration'"
+
+    if [[ ! -z "$TargetName" ]]; then
+        echo " - name '$TargetName'"
+    fi
+    if [[ ! -z "$TargetTenant" ]]; then
+        echo " - tenant '$TargetTenant'"
+    fi
+    if [[ ! -z "$TargetTenantTag" ]]; then
+        echo " - tenant tag '$TargetTenantTag'"
+    fi
+    if [[ ! -z "$TargetTenantedDeploymentParticipation" ]]; then
+        echo " - tenanted deployment participation '$TargetTenantedDeploymentParticipation'"
+    fi
+    if [[ ! -z "$Space" ]]; then
+        echo " - space '$Space'"
+    fi
+}
+
+function configureTentacle() {
+    tentacle create-instance --instance "$instanceName" --config "$configurationDirectory/tentacle.config"
+
+    echo "Setting directory paths ..."
+    tentacle configure --instance "$instanceName" --app "$applicationsDirectory"
+
+    echo "Configuring communication type ..."
+    if [[ ! -z "$ServerCommsAddress" || ! -z "$ServerPort" ]]; then
+        tentacle configure --instance "$instanceName" --noListen "True"
+    else
+        tentacle configure --instance "$instanceName" --port $internalListeningPort --noListen "False"
+    fi
+
+    echo "Updating trust ..."
+    tentacle configure --instance "$instanceName" --reset-trust
+
+    echo "Creating certificate ..."
+    tentacle new-certificate --instance "$instanceName" --if-blank
+}
+
+function registerTentacle() {
+    echo "Registering with server ..."
+
+    local ARGS=()
+
+    ARGS+=('register-k8s-cluster')
+
+    if [[ ! -z "$TargetEnvironment" ]]; then
+        IFS=',' read -ra ENVIRONMENTS <<<"$TargetEnvironment"
+        for i in "${ENVIRONMENTS[@]}"; do
+            ARGS+=('--environment' "$i")
+        done
+    fi
+
+    if [[ ! -z "$TargetRole" ]]; then
+        IFS=',' read -ra ROLES <<<"$TargetRole"
+        for i in "${ROLES[@]}"; do
+            ARGS+=('--role' "$i")
+        done
+    fi
+
+    if [[ ! -z "$TargetTenant" ]]; then
+        IFS=',' read -ra TENANTS <<<"$TargetTenant"
+        for i in "${TENANTS[@]}"; do
+            ARGS+=('--tenant' "$i")
+        done
+    fi
+
+    if [[ ! -z "$TargetTenantTag" ]]; then
+        IFS=',' read -ra TENANTTAGS <<<"$TargetTenantTag"
+        for i in "${TENANTTAGS[@]}"; do
+            ARGS+=('--tenanttag' "$i")
+        done
+    fi
+
+    ARGS+=(
+        '--instance' "$instanceName"
+        '--server' "$ServerUrl"
+        '--space' "$Space"
+        '--policy' "$MachinePolicy")
+
+    if [[ ! -z "$ServerCommsAddress" || ! -z "$ServerPort" ]]; then
+        ARGS+=('--comms-style' 'TentacleActive')
+
+        if [[ ! -z "$ServerCommsAddress" ]]; then
+            ARGS+=('--server-comms-address' $ServerCommsAddress)
+        fi
+
+        if [[ ! -z "$ServerPort" ]]; then
+            ARGS+=('--server-comms-port' $ServerPort)
+        fi
+    else
+        ARGS+=(
+            '--comms-style' 'TentaclePassive'
+            '--publicHostName' $(getPublicHostName))
+
+        if [[ ! -z "$ListeningPort" && "$ListeningPort" != "$internalListeningPort" ]]; then
+            ARGS+=('--tentacle-comms-port' $ListeningPort)
+        fi
+    fi
+
+    if [[ ! -z "$ServerApiKey" ]]; then
+        echo "Registering Tentacle with API key"
+        ARGS+=('--apiKey' $ServerApiKey)
+    elif [[ ! -z "$BearerToken" ]]; then
+        echo "Registering Tentacle with Bearer Token"
+        ARGS+=('--bearerToken' "$BearerToken")
+    else
+        echo "Registering Tentacle with username/password"
+        ARGS+=(
+            '--username' "$ServerUsername"
+            '--password' "$ServerPassword")
+    fi
+
+    if [[ ! -z "$TargetName" ]]; then
+        ARGS+=('--name' "$TargetName")
+    fi
+
+    if [[ ! -z "$TargetTenantedDeploymentParticipation" ]]; then
+        ARGS+=('--tenanted-deployment-participation' "$TargetTenantedDeploymentParticipation")
+    fi
+
+    tentacle "${ARGS[@]}"
+}
+
+echo "==============================================="
+echo "Configuring Octopus Deploy Kubernetes Tentacle"
+
+validateVariables
+
+echo "==============================================="
+
+configureTentacle
+registerTentacle
+
+echo "Configuration successful."
+echo ""

docker/kubernetes-tentacle/scripts/run-tentacle.sh

@@ -0,0 +1,4 @@
+#!/bin/bash
+set -eux
+
+tentacle agent --instance Tentacle --noninteractive