Merge pull request #2168 from dokku/2073_mh-zero-downtime

allow zero-downtime to be completely disabled.
2025-12-29 00:25:08 +01:00 · 2016-06-16 12:46:30 -07:00
parent 5c741696fc 1e0c585b74
commit 5e9df3a92d
14 changed files with 389 additions and 72 deletions
--- a/docs/appendices/0.6.0-migration-guide.md
+++ b/docs/appendices/0.6.0-migration-guide.md
@@ -0,0 +1,9 @@
+# 0.6.0 Migration Guide
+
+## zero-downtime deployment
+- You can now **actually** disable zero-downtime deployments per-app and per-process-type
+  - Some config variables have been moved around
+    - `DOKKU_CHECKS_ENABLED` has been migrated to `DOKKU_CHECKS_SKIPPED`
+    - `DOKKU_CHECKS_DISABLED` is now a thing
+    - The values for the above can be a comma-separated list of process-types or the literal string `_all_`
+  - See the [updated `checks`](/dokku/checks-examples/) docs for more info
--- a/docs/checks-examples.md
+++ b/docs/checks-examples.md
@@ -3,9 +3,10 @@
 > New as of 0.5.0

 ```
-checks <app>                                                                                 Show zero-downtime status
-checks:disable <app>                                                                         Disable zero-downtime checks
-checks:enable <app>                                                                          Enable zero-downtime checks
+checks <app>                             Show zero-downtime status
+checks:disable <app> [process-type(s)]   Disable zero-downtime deployment for all processes (or comma-separated process-type list) ***WARNING: this will cause downtime during deployments***
+checks:enable <app> [process-type(s)]    Enable zero-downtime deployment for all processes (or comma-separated process-type list)
+checks:skip <app> [process-type(s)]      Skip zero-downtime checks for all processes (or comma-separated process-type list)
 ```

 Following a deploy, dokku will wait `10` seconds before routing traffic to the new container to give your application time to boot up. If the application is not running after this time, then the deploy is failed and your old container will continue serving traffic. You can modify this value globally or on a per-application basis:
@@ -15,10 +16,32 @@ dokku config:set --global DOKKU_DEFAULT_CHECKS_WAIT=30
 dokku config:set <app> DOKKU_DEFAULT_CHECKS_WAIT=30
 ```

-You can also choose to skip checks completely on a per-application basis:
+You can also choose to skip checks or disable zero-downtime completely on a per-application/per-process basis:

 ```shell
-dokku checks:disable <app>
+dokku checks:skip <app> worker,web
+```
+
+```shell
+dokku checks:disable <app> worker,web
+```
+> Note that `checks:disable` will now (as of 0.6.0) cause downtime for that process-type during deployments.
+
+Additionally, any given process can only be configured to skip OR disable zero-downtime. example:
+
+```shell
+$ dokku checks:skip testapp worker,web
+-----> Skipping zero downtime for app's (testapp) proctypes (worker,web)
+-----> Unsetting testapp
+-----> Unsetting DOKKU_CHECKS_DISABLED
+-----> Setting config vars
+       DOKKU_CHECKS_SKIPPED: worker,web
+$ dokku checks:disable testapp worker
+-----> Disabling zero downtime for app's (testapp) proctypes (worker)
+-----> Setting config vars
+       DOKKU_CHECKS_DISABLED: worker
+-----> Setting config vars
+       DOKKU_CHECKS_SKIPPED: web
 ```

 Dokku will wait `60` seconds before stopping the old container so that existing connections are given a chance to complete. You can modify this value globally or on a per-application basis:
--- a/docs/upgrading.md
+++ b/docs/upgrading.md
@@ -7,6 +7,7 @@ If your version of dokku is pre 0.3.0 (check with `dokku version`), we recommend
 Before upgrading, check the migration guides to get comfortable with new features and prepare your deployment to be upgraded.

 - [0.5 Migration Guide](/dokku/appendices/0.5.0-migration-guide/)
+- [0.6 Migration Guide](/dokku/appendices/0.6.0-migration-guide/)

 ## Upgrade Instructions

--- a/plugins/00_dokku-standard/subcommands/deploy
+++ b/plugins/00_dokku-standard/subcommands/deploy
@@ -19,6 +19,8 @@ dokku_deploy_cmd() {

  local DOKKU_DEFAULT_DOCKER_ARGS=$(: | plugn trigger docker-args-deploy "$APP" "$IMAGE_TAG")
  local DOKKU_IS_APP_PROXY_ENABLED="$(is_app_proxy_enabled "$APP")"
+  local DOKKU_DOCKER_STOP_TIMEOUT="$(config_get "$APP" DOKKU_DOCKER_STOP_TIMEOUT || true)"
+  [[ $DOKKU_DOCKER_STOP_TIMEOUT ]] && DOCKER_STOP_TIME_ARG="--time=${DOKKU_DOCKER_STOP_TIMEOUT}"

  local line; local PROC_TYPE; local PROC_COUNT; local CONTAINER_INDEX
  while read -r line || [[ -n "$line" ]]; do
@@ -28,6 +30,16 @@ dokku_deploy_cmd() {
    PROC_COUNT=${line#*=}
    CONTAINER_INDEX=1

+    if [[ "$(is_app_proctype_checks_disabled "$APP" "$PROC_TYPE")" == "true" ]]; then
+      dokku_log_info1 "zero downtime is disabled for app ($APP.$PROC_TYPE). stopping currently running containers"
+      local cid proctype_oldids="$(get_app_container_ids "$APP" "$PROC_TYPE")"
+      for cid in $proctype_oldids; do
+        dokku_log_info2 "stopping $APP.$PROC_TYPE ($cid)"
+        # shellcheck disable=SC2086
+        docker stop $DOCKER_STOP_TIME_ARG "$cid" &> /dev/null
+      done
+    fi
+
    while [[ $CONTAINER_INDEX -le $PROC_COUNT ]]; do
      local id=""; local port=""; local ipaddr=""
      local DOKKU_CONTAINER_ID_FILE="$DOKKU_ROOT/$APP/CONTAINER.$PROC_TYPE.$CONTAINER_INDEX"
@@ -82,7 +94,6 @@ dokku_deploy_cmd() {
        local id=$(docker run $DOKKU_GLOBAL_RUN_ARGS -d $DOCKER_ARGS $IMAGE $START_CMD)
      fi

-      # if we can't post-deploy successfully, kill new container
      kill_new() {
        declare desc="wrapper function to kill newly started app container"
        local id="$1"
@@ -92,14 +103,12 @@ dokku_deploy_cmd() {
      }

      # run checks first, then post-deploy hooks, which switches Nginx traffic
-      if [[ "$(is_app_checks_enabled "$APP")" == "false" ]]; then
-        dokku_log_info1 "zero downtime is disabled for app ($APP). skipping pre-flight checks"
-      else
-        trap 'kill_new $id' INT TERM EXIT
-        dokku_log_info1 "Running pre-flight checks"
+      trap 'kill_new $id' INT TERM EXIT
+      if [[ "$(is_app_proctype_checks_disabled "$APP" "$PROC_TYPE")" == "false" ]]; then
+        dokku_log_info1 "Attempting pre-flight checks"
        plugn trigger check-deploy  "$APP" "$id" "$PROC_TYPE" "$port" "$ipaddr"
-        trap -        INT TERM EXIT
      fi
+      trap -        INT TERM EXIT

      # now using the new container
      [[ -n "$id" ]] && echo "$id" > "$DOKKU_CONTAINER_ID_FILE"
@@ -143,8 +152,6 @@ dokku_deploy_cmd() {
    for oldid in $oldids; do
      dokku_log_info2 "$oldid"
    done
-    local DOKKU_DOCKER_STOP_TIMEOUT="$(config_get "$APP" DOKKU_DOCKER_STOP_TIMEOUT || true)"
-    [[ $DOKKU_DOCKER_STOP_TIMEOUT ]] && DOCKER_STOP_TIME_ARG="--time=${DOKKU_DOCKER_STOP_TIMEOUT}"
    (
      exec >/dev/null 2>/dev/null </dev/null
      trap '' INT HUP
--- a/plugins/checks/check-deploy
+++ b/plugins/checks/check-deploy
@@ -58,8 +58,8 @@ checks_check_deploy() {
  eval "$(config_export global)"
  eval "$(config_export app "$APP")"

-  if [[ "$(is_app_checks_enabled "$APP")" == "false" ]]; then
-    dokku_log_info2_quiet "Zero downtime checks for app ($APP) have been disabled. moving on..."
+  if [[ "$(is_app_proctype_checks_skipped "$APP" "$PROC_TYPE")" == "true" ]]; then
+    dokku_log_info2_quiet "Zero downtime checks for app ($APP) have been skipped. moving on..."
    exit 0
  fi

--- a/plugins/checks/commands
+++ b/plugins/checks/commands
@@ -8,15 +8,16 @@ case "$1" in
      declare desc="return checks plugin help content"
      cat<<help_content
    checks <app>, Show zero-downtime status
-    checks:enable <app>, Enable zero-downtime checks
-    checks:disable <app>, Disable zero-downtime checks
+    checks:disable <app> [process-type(s)], Disable zero-downtime deployment for all processes (or comma-separated process-type list) ***WARNING: this will cause downtime during deployments***
+    checks:enable <app> [process-type(s)], Enable zero-downtime deployment for all processes (or comma-separated process-type list)
+    checks:skip <app> [process-type(s)], Skip zero-downtime checks for all processes (or comma-separated process-type list)
 help_content
    }

    if [[ $1 = "checks:help" ]] ; then
        echo -e 'Usage: dokku checks[:COMAND]'
        echo ''
-        echo 'Manage zero-downtime checks.'
+        echo 'Manage zero-downtime settings.'
        echo ''
        echo 'Additional commands:'
        help_content_func | sort | column -c2 -t -s,
--- a/plugins/checks/functions
+++ b/plugins/checks/functions
@@ -3,15 +3,27 @@ set -eo pipefail; [[ $DOKKU_TRACE ]] && set -x
 source "$PLUGIN_CORE_AVAILABLE_PATH/common/functions"
 source "$PLUGIN_AVAILABLE_PATH/config/functions"

-is_app_checks_enabled() {
-  declare desc="return app zero-downtime checks status"
+is_app_proctype_checks_disabled() {
+  declare desc="return true if app's proctype(s) checks are disabled"
  local APP="$1"; verify_app_name "$APP"
-  local DOKKU_CHECKS_ENABLED=$(config_get "$APP" DOKKU_CHECKS_ENABLED)
+  local PROCTYPE="$2" status=false
+  local DOKKU_CHECKS_DISABLED=$(config_get "$APP" DOKKU_CHECKS_DISABLED || true)

-  if [[ -z "$DOKKU_CHECKS_ENABLED" ]] || [[ "$DOKKU_CHECKS_ENABLED" == "1" ]];then
-    local status=true
-  else
-    local status=false
+  if [[ "$DOKKU_CHECKS_DISABLED" == "_all_" ]] || [[ "$(is_val_in_list "$PROCTYPE" "$DOKKU_CHECKS_DISABLED")" == "true" ]] ;then
+    status=true
+  fi
+
+  echo $status
+}
+
+is_app_proctype_checks_skipped() {
+  declare desc="return true if app's proctype(s) checks are skipped"
+  local APP="$1"; verify_app_name "$APP"
+  local PROCTYPE="$2" status=false
+  local DOKKU_CHECKS_SKIPPED=$(config_get "$APP" DOKKU_CHECKS_SKIPPED || true)
+
+  if [[ "$DOKKU_CHECKS_SKIPPED" == "_all_" ]] || [[ "$(is_val_in_list "$PROCTYPE" "$DOKKU_CHECKS_SKIPPED")" == "true" ]] ;then
+    status=true
  fi

  echo $status
--- a/plugins/checks/install
+++ b/plugins/checks/install
@@ -3,7 +3,7 @@ set -eo pipefail; [[ $DOKKU_TRACE ]] && set -x
 source "$PLUGIN_CORE_AVAILABLE_PATH/common/functions"
 source "$PLUGIN_AVAILABLE_PATH/config/functions"

-migrate_checks_vars() {
+migrate_checks_vars_0_5_0() {
  declare desc="migrates deprecated CHECKS config variables to simplified counter part introduced in 0.5.x"
  local APPS="$(dokku_apps)"
  local GLOBAL_SKIP_ALL_CHECKS=$(dokku config:get --global DOKKU_SKIP_ALL_CHECKS || true)
@@ -11,7 +11,7 @@ migrate_checks_vars() {

  local app

-  dokku_log_info1 "Migrating zero downtime env variables. The following variables have been deprecated"
+  dokku_log_info1 "Migrating zero downtime env variables to 0.5.x. The following variables have been deprecated"
  dokku_log_info2 "DOKKU_SKIP_ALL_CHECKS DOKKU_SKIP_DEFAULT_CHECKS"
  dokku_log_info2 "Please use dokku checks:[disable|enable] <app> to control zero downtime functionality"

@@ -19,23 +19,47 @@ migrate_checks_vars() {
    local APP_SKIP_ALL_CHECKS=$(dokku config:get "$app" DOKKU_SKIP_ALL_CHECKS || true)
    local APP_SKIP_DEFAULT_CHECKS=$(dokku config:get "$app" DOKKU_SKIP_DEFAULT_CHECKS || true)

-    if [[ "$APP_SKIP_ALL_CHECKS" == "true" ]] || [[ "$APP_SKIP_DEFAULT_CHECKS" == "true" ]] || \
-       [[ "$GLOBAL_SKIP_ALL_CHECKS" == "true" ]] || [[ "$GLOBAL_SKIP_DEFAULT_CHECKS" == "true" ]]; then
-       dokku_log_info2 ""
-       dokku_log_info2 "zero downtime disabled for app ($app)"
+    if [[ "$APP_SKIP_ALL_CHECKS" == "true" ]] || [[ "$APP_SKIP_DEFAULT_CHECKS" == "true" ]] || [[ "$GLOBAL_SKIP_ALL_CHECKS" == "true" ]] || [[ "$GLOBAL_SKIP_DEFAULT_CHECKS" == "true" ]]; then
+      dokku_log_info2 ""
+      dokku_log_info2 "zero downtime checks disabled for app ($app)"
      config_set --no-restart "$app" DOKKU_CHECKS_ENABLED=0
    fi
    if [[ -n "$APP_SKIP_ALL_CHECKS" ]] || [[ -n "$APP_SKIP_DEFAULT_CHECKS" ]]; then
      config_unset --no-restart "$app" DOKKU_SKIP_ALL_CHECKS DOKKU_SKIP_DEFAULT_CHECKS
    fi
-    dokku_log_info2 "Migration complete"
-    dokku_log_info2 ""
  done

  if [[ -n "$GLOBAL_SKIP_ALL_CHECKS" ]] || [[ -n "$GLOBAL_SKIP_DEFAULT_CHECKS" ]]; then
    dokku_log_info1 "Removing global zero downtime settings"
    config_unset --global DOKKU_SKIP_ALL_CHECKS DOKKU_SKIP_DEFAULT_CHECKS
  fi
+  dokku_log_info2 "Migration complete"
+  dokku_log_info2 ""
 }

-migrate_checks_vars "$@"
+migrate_checks_vars_0_5_0 "$@"
+
+migrate_checks_vars_0_6_0() {
+  declare desc="migrates CHECKS config variables from 0.5.x to support fully-disabled zero-downtime checks"
+  local APPS="$(dokku_apps)"
+
+  local app
+
+  dokku_log_info1 "Migrating zero downtime env variables to 0.6.x. The following variables will be migrated"
+  dokku_log_info2 "DOKKU_CHECKS_ENABLED -> DOKKU_CHECKS_SKIPPED"
+  for app in $APPS; do
+    local APP_DOKKU_CHECKS_ENABLED=$(dokku config:get "$app" DOKKU_CHECKS_ENABLED || true)
+    if [[ $APP_DOKKU_CHECKS_ENABLED ]]; then
+      if [[ "$DOKKU_CHECKS_ENABLED" == "0" ]]; then
+        dokku_log_info2 ""
+        dokku_log_info2 "zero downtime checks disabled for app ($app)"
+        config_set --no-restart "$app" DOKKU_CHECKS_SKIPPED="_all_"
+      fi
+      config_unset --no-restart "$app" DOKKU_CHECKS_ENABLED || true
+    fi
+  done
+  dokku_log_info2 "Migration complete"
+  dokku_log_info2 ""
+}
+
+migrate_checks_vars_0_6_0 "$@"
--- a/plugins/checks/subcommands/default
+++ b/plugins/checks/subcommands/default
@@ -4,19 +4,24 @@ source "$PLUGIN_CORE_AVAILABLE_PATH/common/functions"
 source "$PLUGIN_AVAILABLE_PATH/checks/functions"

 checks_main_cmd() {
-  declare desc="displays app zero-downtime status"
+  declare desc="displays app zero-downtime checks status"
  local cmd="checks"
+  [[ "$1" == "$cmd" ]] && shift 1
  local APPS=$(dokku_apps)
  if [[ -n "$1" ]]; then
    local APPS="$1"
  fi

-  dokku_col_log_info1_quiet "App Name" "Zero-Downtime Status"
+  dokku_col_log_info1_quiet "App Name" "Proctypes Disabled" "Proctypes Skipped"
  local app
  for app in $APPS; do
    verify_app_name "$app"
-    dokku_col_log_msg "$app" "$(is_app_checks_enabled "$app")"
+    local DOKKU_CHECKS_DISABLED=$(config_get "$app" DOKKU_CHECKS_DISABLED)
+    local DOKKU_CHECKS_SKIPPED=$(config_get "$app" DOKKU_CHECKS_SKIPPED)
+    local checks_disabled="${DOKKU_CHECKS_DISABLED:-none}"
+    local checks_skipped="${DOKKU_CHECKS_SKIPPED:-none}"
+    dokku_col_log_msg "$app" "$checks_disabled" "$checks_skipped"
  done
 }

-checks_main_cmd "$2"
+checks_main_cmd "$@"
--- a/plugins/checks/subcommands/disable
+++ b/plugins/checks/subcommands/disable
@@ -4,18 +4,41 @@ source "$PLUGIN_CORE_AVAILABLE_PATH/common/functions"
 source "$PLUGIN_AVAILABLE_PATH/checks/functions"

 checks_disable_cmd() {
-  declare desc="disable zero-downtime for app"
-  local cmd="check:disable"
+  declare desc="disable zero-downtime checks for app/proctypes"
+  local cmd="checks:disable"
+  [[ "$1" == "$cmd" ]] && shift 1
  local APP="$1"; verify_app_name "$APP"
+  local PROCTYPES="${2:-_all_}"
+  local DOKKU_CHECKS_DISABLED=$(config_get "$APP" DOKKU_CHECKS_DISABLED || true)
+  local DOKKU_CHECKS_SKIPPED=$(config_get "$APP" DOKKU_CHECKS_SKIPPED || true)

-  if [[ "$(is_app_checks_enabled "$APP")" == "true" ]]; then
+  if [[ "$PROCTYPES" == "_all_" ]]; then
    dokku_log_info1 "Disabling zero downtime for app ($APP)"
-    [[ "$2" == "--no-restart" ]] && local CONFIG_SET_ARGS=$2
-    # shellcheck disable=SC2086
-    config_set $CONFIG_SET_ARGS $APP DOKKU_CHECKS_ENABLED=0
+    config_set --no-restart "$APP" DOKKU_CHECKS_DISABLED="$PROCTYPES"
+    config_unset --no-restart "$APP" DOKKU_CHECKS_SKIPPED
  else
-    dokku_log_info1 "zero downtime is already disable for app ($APP)"
+    dokku_log_info1 "Disabling zero downtime for app's ($APP) proctypes ($PROCTYPES)"
+    local PROCTYPE OIFS="$IFS" IFS=,
+    for PROCTYPE in $PROCTYPES; do
+      IFS="$OIFS"
+      [[ "$(is_val_in_list "$PROCTYPE" "$DOKKU_CHECKS_DISABLED")" == "false" ]] && \
+        DOKKU_CHECKS_DISABLED="$(add_val_to_list "$PROCTYPE" "$DOKKU_CHECKS_DISABLED")"
+      [[ "$(is_val_in_list "$PROCTYPE" "$DOKKU_CHECKS_SKIPPED")" == "true" ]] && \
+        DOKKU_CHECKS_SKIPPED="$(remove_val_from_list "$PROCTYPE" "$DOKKU_CHECKS_SKIPPED")"
+    done
+    DOKKU_CHECKS_DISABLED="$(remove_val_from_list "_all_" "$DOKKU_CHECKS_DISABLED")"
+    if [[ -z "$DOKKU_CHECKS_DISABLED" ]]; then
+      config_unset --no-restart "$APP" DOKKU_CHECKS_DISABLED
+    else
+      config_set --no-restart "$APP" DOKKU_CHECKS_DISABLED="$DOKKU_CHECKS_DISABLED"
+    fi
+
+    if [[ -z "$DOKKU_CHECKS_SKIPPED" ]]; then
+      config_unset --no-restart "$APP" DOKKU_CHECKS_SKIPPED
+    else
+      config_set --no-restart "$APP" DOKKU_CHECKS_SKIPPED="$DOKKU_CHECKS_SKIPPED"
+    fi
  fi
 }

-checks_disable_cmd "$2" --no-restart
+checks_disable_cmd "$@"
--- a/plugins/checks/subcommands/enable
+++ b/plugins/checks/subcommands/enable
@@ -4,18 +4,40 @@ source "$PLUGIN_CORE_AVAILABLE_PATH/common/functions"
 source "$PLUGIN_AVAILABLE_PATH/checks/functions"

 checks_enable_cmd() {
-  declare desc="enable zero-downtime for app"
+  declare desc="enable zero-downtime checks for app/proctypes"
  local cmd="checks:enable"
+  [[ "$1" == "$cmd" ]] && shift 1
  local APP="$1"; verify_app_name "$APP"
+  local PROCTYPES="${2:-_all_}"

-  if [[ "$(is_app_checks_enabled "$APP")" == "false" ]]; then
-    dokku_log_info1 "Enabling zero downtime for app ($APP)"
-    [[ "$2" == "--no-restart" ]] && local CONFIG_SET_ARGS=$2
-    # shellcheck disable=SC2086
-    config_set $CONFIG_SET_ARGS $APP DOKKU_CHECKS_ENABLED=1
+  local DOKKU_CHECKS_DISABLED=$(config_get "$APP" DOKKU_CHECKS_DISABLED || true)
+  local DOKKU_CHECKS_SKIPPED=$(config_get "$APP" DOKKU_CHECKS_SKIPPED || true)
+
+  if [[ "$PROCTYPES" == "_all_" ]]; then
+    dokku_log_info1 "Enabling zero downtime for app's ($APP)"
+    config_unset --no-restart "$APP" DOKKU_CHECKS_DISABLED
+    config_unset --no-restart "$APP" DOKKU_CHECKS_SKIPPED
  else
-    dokku_log_info1 "zero downtime is already enabled for app ($APP)"
+    dokku_log_info1 "Enabling zero downtime for app's ($APP) proctypes ($PROCTYPES)"
+    local PROCTYPE OIFS="$IFS" IFS=,
+    for PROCTYPE in $PROCTYPES; do
+      DOKKU_CHECKS_DISABLED="$(remove_val_from_list "$PROCTYPE" "$DOKKU_CHECKS_DISABLED")"
+      DOKKU_CHECKS_SKIPPED="$(remove_val_from_list "$PROCTYPE" "$DOKKU_CHECKS_SKIPPED")"
+    done
+
+    IFS="$OIFS"
+    if [[ -z "$DOKKU_CHECKS_DISABLED" ]]; then
+      config_unset --no-restart "$APP" DOKKU_CHECKS_DISABLED
+    else
+      config_set --no-restart "$APP" DOKKU_CHECKS_DISABLED="$DOKKU_CHECKS_DISABLED"
+    fi
+
+    if [[ -z "$DOKKU_CHECKS_SKIPPED" ]]; then
+      config_unset --no-restart "$APP" DOKKU_CHECKS_SKIPPED
+    else
+      config_set --no-restart "$APP" DOKKU_CHECKS_SKIPPED="$DOKKU_CHECKS_SKIPPED"
+    fi
  fi
 }

-checks_enable_cmd "$2" --no-restart
+checks_enable_cmd "$@"
--- a/plugins/checks/subcommands/skip
+++ b/plugins/checks/subcommands/skip
@@ -0,0 +1,44 @@
+#!/usr/bin/env bash
+set -eo pipefail; [[ $DOKKU_TRACE ]] && set -x
+source "$PLUGIN_CORE_AVAILABLE_PATH/common/functions"
+source "$PLUGIN_AVAILABLE_PATH/checks/functions"
+
+checks_skip_cmd() {
+  declare desc="skip zero-downtime checks for app/proctypes"
+  local cmd="checks:skip"
+  [[ "$1" == "$cmd" ]] && shift 1
+  local APP="$1"; verify_app_name "$APP"
+  local PROCTYPES="${2:-_all_}"
+  local DOKKU_CHECKS_DISABLED=$(config_get "$APP" DOKKU_CHECKS_DISABLED || true)
+  local DOKKU_CHECKS_SKIPPED=$(config_get "$APP" DOKKU_CHECKS_SKIPPED || true)
+
+  if [[ "$PROCTYPES" == "_all_" ]]; then
+    dokku_log_info1 "Skipping zero downtime for app ($APP)"
+    config_set --no-restart "$APP" DOKKU_CHECKS_SKIPPED="$PROCTYPES"
+    config_unset --no-restart "$APP" DOKKU_CHECKS_DISABLED
+  else
+    dokku_log_info1 "Skipping zero downtime for app's ($APP) proctypes ($PROCTYPES)"
+    local PROCTYPE OIFS="$IFS" IFS=,
+    for PROCTYPE in $PROCTYPES; do
+      IFS="$OIFS"
+      [[ "$(is_val_in_list "$PROCTYPE" "$DOKKU_CHECKS_SKIPPED")" == "false" ]] && \
+        DOKKU_CHECKS_SKIPPED="$(add_val_to_list "$PROCTYPE" "$DOKKU_CHECKS_SKIPPED")"
+      [[ "$(is_val_in_list "$PROCTYPE" "$DOKKU_CHECKS_DISABLED")" == "true" ]] && \
+        DOKKU_CHECKS_DISABLED="$(remove_val_from_list "$PROCTYPE" "$DOKKU_CHECKS_DISABLED")"
+    done
+    DOKKU_CHECKS_SKIPPED="$(remove_val_from_list "_all_" "$DOKKU_CHECKS_SKIPPED")"
+    if [[ -z "$DOKKU_CHECKS_DISABLED" ]]; then
+      config_unset --no-restart "$APP" DOKKU_CHECKS_DISABLED
+    else
+      config_set --no-restart "$APP" DOKKU_CHECKS_DISABLED="$DOKKU_CHECKS_DISABLED"
+    fi
+
+    if [[ -z "$DOKKU_CHECKS_SKIPPED" ]]; then
+      config_unset --no-restart "$APP" DOKKU_CHECKS_SKIPPED
+    else
+      config_set --no-restart "$APP" DOKKU_CHECKS_SKIPPED="$DOKKU_CHECKS_SKIPPED"
+    fi
+  fi
+}
+
+checks_skip_cmd "$@"
--- a/plugins/common/functions
+++ b/plugins/common/functions
@@ -288,7 +288,7 @@ copy_from_image() {
 }

 get_app_container_ids() {
-  declare desc="returns list of docker container ids for given app"
+  declare desc="returns list of docker container ids for given app/container_type"
  local APP="$1"; local CONTAINER_TYPE="$2"
  verify_app_name "$APP"
  [[ -f $DOKKU_ROOT/$APP/CONTAINER ]] && DOKKU_CIDS+=$(< "$DOKKU_ROOT/$APP/CONTAINER")
@@ -795,3 +795,20 @@ is_val_in_list() {

  echo "$val_in_list"
 }
+
+remove_val_from_list() {
+  declare desc="remove value ($1) from list ($2) separated by delimiter ($3) (delimiter defaults to comma) and return list"
+  local value="$1" list="$2" delimiter="${3:-,}"
+  list="${list//$value/}"
+  list="${list//$delimiter$delimiter/$delimiter}"
+  list="${list/#$delimiter/}"
+  list="${list/%$delimiter/}"
+  echo "$list"
+}
+
+add_val_to_list() {
+  declare desc="add value ($1) to list ($2) separated by delimiter ($3) (delimiter defaults to comma) and return list"
+  local value="$1" list="$2" delimiter="${3:-,}"
+  list+="${delimiter}$value"
+  echo "$list"
+}
--- a/tests/unit/10_checks.bats
+++ b/tests/unit/10_checks.bats
@@ -15,31 +15,160 @@ teardown() {
 }

@test "(checks) checks" {
-  run bash -c "dokku checks $TEST_APP | grep -q true"
+  run bash -c "dokku checks $TEST_APP| grep $TEST_APP | xargs"
  echo "output: "$output
  echo "status: "$status
-  assert_success
+  assert_output "$TEST_APP none none"
 }

@test "(checks) checks:disable" {
-  dokku checks:disable $TEST_APP
-  assert_success
-
-  run bash -c "dokku config:get $TEST_APP DOKKU_CHECKS_ENABLED"
+  run bash -c "dokku checks:disable $TEST_APP"
  echo "output: "$output
  echo "status: "$status
-  assert_output "0"
-}
-
-@test "(checks) checks:enable" {
-  dokku checks:disable $TEST_APP
  assert_success

-  dokku checks:enable $TEST_APP
-  assert_success
-
-  run bash -c "dokku config:get $TEST_APP DOKKU_CHECKS_ENABLED"
+  run bash -c "dokku config:get $TEST_APP DOKKU_CHECKS_DISABLED"
  echo "output: "$output
  echo "status: "$status
-  assert_output "1"
+  assert_output "_all_"
+}
+
+@test "(checks) checks:disable -> checks:enable" {
+  run bash -c "dokku checks:disable $TEST_APP"
+  echo "output: "$output
+  echo "status: "$status
+  assert_success
+
+  run bash -c "dokku config:get $TEST_APP DOKKU_CHECKS_DISABLED"
+  echo "output: "$output
+  echo "status: "$status
+  assert_output "_all_"
+
+  run bash -c "dokku config:get $TEST_APP DOKKU_CHECKS_SKIPPED"
+  echo "output: "$output
+  echo "status: "$status
+  assert_output ""
+
+  run bash -c "dokku checks:enable $TEST_APP"
+  echo "output: "$output
+  echo "status: "$status
+  assert_success
+
+  run bash -c "dokku config:get $TEST_APP DOKKU_CHECKS_DISABLED"
+  echo "output: "$output
+  echo "status: "$status
+  assert_output ""
+
+  run bash -c "dokku config:get $TEST_APP DOKKU_CHECKS_SKIPPED"
+  echo "output: "$output
+  echo "status: "$status
+  assert_output ""
+}
+
+@test "(checks) checks:disable -> checks:skip" {
+  run bash -c "dokku checks:disable $TEST_APP web,worker,urgentworker,notifications"
+  echo "output: "$output
+  echo "status: "$status
+  assert_success
+
+  run bash -c "dokku config:get $TEST_APP DOKKU_CHECKS_DISABLED"
+  echo "output: "$output
+  echo "status: "$status
+  assert_output "web,worker,urgentworker,notifications"
+
+  run bash -c "dokku config:get $TEST_APP DOKKU_CHECKS_SKIPPED"
+  echo "output: "$output
+  echo "status: "$status
+  assert_output ""
+
+  run bash -c "dokku checks:skip $TEST_APP urgentworker,worker"
+  echo "output: "$output
+  echo "status: "$status
+  assert_success
+
+  run bash -c "dokku config:get $TEST_APP DOKKU_CHECKS_SKIPPED"
+  echo "output: "$output
+  echo "status: "$status
+  assert_output "urgentworker,worker"
+
+  run bash -c "dokku config:get $TEST_APP DOKKU_CHECKS_DISABLED"
+  echo "output: "$output
+  echo "status: "$status
+  assert_output "web,notifications"
+}
+
+@test "(checks) checks:skip" {
+  run bash -c "dokku checks:skip $TEST_APP"
+  echo "output: "$output
+  echo "status: "$status
+  assert_success
+
+  run bash -c "dokku config:get $TEST_APP DOKKU_CHECKS_SKIPPED"
+  echo "output: "$output
+  echo "status: "$status
+  assert_output "_all_"
+}
+
+@test "(checks) checks:skip -> checks:enable" {
+  run bash -c "dokku checks:skip $TEST_APP"
+  echo "output: "$output
+  echo "status: "$status
+  assert_success
+
+  run bash -c "dokku config:get $TEST_APP DOKKU_CHECKS_SKIPPED"
+  echo "output: "$output
+  echo "status: "$status
+  assert_output "_all_"
+
+  run bash -c "dokku config:get $TEST_APP DOKKU_CHECKS_DISABLED"
+  echo "output: "$output
+  echo "status: "$status
+  assert_output ""
+
+  run bash -c "dokku checks:enable $TEST_APP"
+  echo "output: "$output
+  echo "status: "$status
+  assert_success
+
+  run bash -c "dokku config:get $TEST_APP DOKKU_CHECKS_SKIPPED"
+  echo "output: "$output
+  echo "status: "$status
+  assert_output ""
+
+  run bash -c "dokku config:get $TEST_APP DOKKU_CHECKS_DISABLED"
+  echo "output: "$output
+  echo "status: "$status
+  assert_output ""
+}
+
+@test "(checks) checks:skip -> checks:disable" {
+  run bash -c "dokku checks:skip $TEST_APP web,worker,urgentworker,notifications"
+  echo "output: "$output
+  echo "status: "$status
+  assert_success
+
+  run bash -c "dokku config:get $TEST_APP DOKKU_CHECKS_SKIPPED"
+  echo "output: "$output
+  echo "status: "$status
+  assert_output "web,worker,urgentworker,notifications"
+
+  run bash -c "dokku config:get $TEST_APP DOKKU_CHECKS_DISABLED"
+  echo "output: "$output
+  echo "status: "$status
+  assert_output ""
+
+  run bash -c "dokku checks:disable $TEST_APP urgentworker,worker"
+  echo "output: "$output
+  echo "status: "$status
+  assert_success
+
+  run bash -c "dokku config:get $TEST_APP DOKKU_CHECKS_DISABLED"
+  echo "output: "$output
+  echo "status: "$status
+  assert_output "urgentworker,worker"
+
+  run bash -c "dokku config:get $TEST_APP DOKKU_CHECKS_SKIPPED"
+  echo "output: "$output
+  echo "status: "$status
+  assert_output "web,notifications"
 }