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Make gcp-linux example template use a non-root user #2480

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Merged
merged 6 commits into from
Aug 3, 2022
Merged

Make gcp-linux example template use a non-root user #2480

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4531a39
make gcp-linux example template use a non-root user
dwahler Jun 17, 2022
3f841e4
don't try to create user account if it already exists
dwahler Jun 30, 2022
4f9a28e
fix bash syntax
dwahler Jun 30, 2022
0db9746
Merge branch 'main' into david/gcp-template-nonroot
dwahler Aug 3, 2022
7002bc9
fix broken merge
dwahler Aug 3, 2022
e731e00
upgrade to debian-10 image since debian-9 is no longer available
dwahler Aug 3, 2022
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27 changes: 15 additions & 12 deletions examples/templates/gcp-linux/main.tf
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Original file line number Diff line number Diff line change
Expand Up @@ -39,7 +39,7 @@ resource "google_compute_disk" "root" {
name = "coder-${lower(data.coder_workspace.me.owner)}-${lower(data.coder_workspace.me.name)}-root"
type = "pd-ssd"
zone = var.zone
image = "debian-cloud/debian-9"
image = "debian-cloud/debian-10"
lifecycle {
ignore_changes = [image]
}
Expand Down Expand Up @@ -70,21 +70,24 @@ resource "google_compute_instance" "dev" {
email = data.google_compute_default_service_account.default.email
scopes = ["cloud-platform"]
}
# The startup script runs as root with no $HOME environment set up, which can break workspace applications, so
# instead of directly running the agent init script, setup the home directory, write the init script, and then execute
# it.
# The startup script runs as root with no $HOME environment set up, so instead of directly
# running the agent init script, create a user (with a homedir, default shell and sudo
# permissions) and execute the init script as that user.
metadata_startup_script = <<EOMETA
#!/usr/bin/env sh
set -eux

mkdir /root || true
cat <<'EOCODER' > /root/coder_agent.sh
${coder_agent.main.init_script}
EOCODER
chmod +x /root/coder_agent.sh

export HOME=/root
/root/coder_agent.sh
# If user does not exist, create it and set up passwordless sudo
if ! id -u "${local.linux_user}" >/dev/null 2>&1; then
useradd -m -s /bin/bash "${local.linux_user}"
echo "${local.linux_user} ALL=(ALL) NOPASSWD:ALL" > /etc/sudoers.d/coder-user
fi

exec sudo -u "${local.linux_user}" sh -c '${coder_agent.main.init_script}'
EOMETA
}

locals {
# Ensure Coder username is a valid Linux username
linux_user = lower(substr(data.coder_workspace.me.owner, 0, 32))
}